Rohde&Schwarz SMW-K114 User Manual

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R&S®SMW-K114 OFDM Signal Generation User Manual

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1177624602 Version 15

This document describes the following software options:

●

R&S®SMW-K114 OFDM Signal Generation (1414.1985.xx)

This manual describes firmware version FW 5.00.166.xx and later of the R&S®SMW200A.

© 2022 Rohde & Schwarz GmbH & Co. KG Muehldorfstr. 15, 81671 Muenchen, Germany Phone: +49 89 41 29 - 0 Email: info@rohde-schwarz.com Internet: www.rohde-schwarz.com Subject to change – data without tolerance limits is not binding. R&S® is a registered trademark of Rohde & Schwarz GmbH & Co. KG. Trade names are trademarks of the owners.

1177.6246.02 | Version 15 | R&S®SMW-K114

The following abbreviations are used throughout this manual: R&S®SMW200A is abbreviated as R&S SMW, R&S®WinIQSIM2 is abbreviated as R&S WinIQSIM2; the license types 02/03/07/11/13/16/12 are abbreviated as xx.

R&S®SMW-K114

1 Welcome to the OFDM Signal Generation option............................... 5

1.1 Accessing the OFDM Signal Generation dialog.........................................................6

1.2 What's new.....................................................................................................................6

1.3 Documentation overview..............................................................................................6

1.3.1 Getting started manual....................................................................................................6

1.3.2 User manuals and help................................................................................................... 6

1.3.3 Tutorials...........................................................................................................................7

1.3.4 Service manual............................................................................................................... 7

1.3.5 Instrument security procedures.......................................................................................7

1.3.6 Printed safety instructions............................................................................................... 7

1.3.7 Data sheets and brochures............................................................................................. 7

Contents

1.3.8 Release notes and open source acknowledgment (OSA).............................................. 8

1.3.9 Application notes, application cards, white papers, etc...................................................8

1.4 Scope............................................................................................................................. 8

1.5 Notes on screenshots...................................................................................................8

2 About OFDM Signal Generation option............................................... 9

2.1 Required options...........................................................................................................9

2.2 Overview of modulation schemes............................................................................... 9

2.2.1 OFDM..............................................................................................................................9

2.2.2 f-OFDM......................................................................................................................... 10

2.2.3 GFDM............................................................................................................................10

2.2.4 UFMC............................................................................................................................ 11

2.2.5 FBMC............................................................................................................................ 12

2.2.6 Filtering......................................................................................................................... 13

2.3 Supported multiple access schemes........................................................................ 18

2.4 Physical layer parameterization................................................................................ 21

2.5

Generating configuration files for R&S®VSE-K96....................................................22

3 OFDM Signal Generation configuration and settings.......................24

3.1 General settings.......................................................................................................... 24

3.2 General settings.......................................................................................................... 27

3.2.1 Physical settings........................................................................................................... 27

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3.2.2 Filter settings.................................................................................................................33

3.2.3 Modulation configuration settings..................................................................................35

3.3 Allocation settings...................................................................................................... 37

3.3.1 User settings................................................................................................................. 38

3.3.2 Allocations settings....................................................................................................... 39

3.3.3 SCMA settings.............................................................................................................. 44

3.3.4 Time plan.......................................................................................................................46

3.4 Trigger settings........................................................................................................... 48

3.5 Marker settings............................................................................................................53

3.6 Clock settings..............................................................................................................54

3.7 Local and global connectors settings.......................................................................56

4 Remote-control commands.................................................................57

Contents

4.1 General commands.....................................................................................................58

4.2 Physical settings commands.....................................................................................61

4.3 Filter commands......................................................................................................... 65

4.4 Modulation commands............................................................................................... 68

4.5 User commands.......................................................................................................... 70

4.6 Allocation commands.................................................................................................71

4.7 SCMA commands........................................................................................................78

4.8 Trigger commands......................................................................................................80

4.9 Marker commands...................................................................................................... 86

4.10 Clock commands........................................................................................................ 87

Annex.................................................................................................... 89

A XML settings file...................................................................................89

Glossary: List of terms and abbreviations........................................ 92

Glossary: Specifications, references and further information........ 94

List of commands................................................................................ 95

Index......................................................................................................97

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1 Welcome to the OFDM Signal Generation

Welcome to the OFDM Signal Generation option

option

The R&S SMW-K114 is a firmware application that adds functionality to generate:

●

User-defined OFDM signals

●

Pre-release 5G signals in accordance with the 5GNOW project specification

5GNOW D3.x.

With the provided settings, you can generate any of the specified waveform types and parameterize the signals. For example, you can select the pulse-shaping filters, the subcarrier spacing and the number of carriers. Moreover, you can set the used modulation and data content and enable preamble and cyclic prefix generation. Configuration of the sparse code multiple access (SCMA) settings is supported, too.

The generated signal is suitable for testing of components or receivers with userdefined OFDM signals or realistic pre-5G physical layer signals.

The R&S SMW-K114 key features are:

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Support of GFDM, UFMC, FBMC, f-OFDM and OFDM waveforms

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Support of the proposed filter types

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Flexible resource allocation, independent of the frame-type structure

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Flexibly switching between different modulation formats, filters, symbol rates

●

Support of multiple access schemes such as SCMA

●

Optional use of a cyclic prefix or a preamble

●

Internal signal generator solution, no need for external PC

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For f-OFDM and OFDM modulations, automatic generation of configuration file for upload in the R&S®VSE-K96.

●

Optional discrete Fourier transformation spread OFDM (DFT-s-OFDM) for data allocations

This user manual contains a description of the functionality that the application provides, including remote control operation.

All functions not discussed in this manual are the same as in the base unit and are described in the R&S SMW user manual. The latest version is available at:

www.rohde-schwarz.com/manual/SMW200A

Installation

You can find detailed installation instructions in the delivery of the option or in the R&S SMW service manual.

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1.1 Accessing the OFDM Signal Generation dialog

1.2 What's new

Welcome to the OFDM Signal Generation option

Documentation overview

To open the dialog with OFDM Signal Generation settings

► In the block diagram of the R&S SMW, select "Baseband > OFDM Signal Genera-

tion".

A dialog box opens that displays the provided general settings.

The signal generation is not started immediately. To start signal generation with the default settings, select "State > On".

This manual describes firmware version FW 5.00.166.xx and later of the R&S®SMW200A.

Compared to the previous version, it provides the new features listed below:

●

Discrete Fourier transform spread OFDM (DFT-s-OFDM) for precoding data allocations, see "DFT-S (skip non-data)" on page 31.

●

All allocated users are automatically active, the user state is removed, see Chap-

ter 3.3.1, "User settings", on page 38.

1.3 Documentation overview

This section provides an overview of the R&S SMW user documentation. Unless specified otherwise, you find the documents on the R&S SMW product page at:

www.rohde-schwarz.com/manual/smw200a

1.3.1 Getting started manual

Introduces the R&S SMW and describes how to set up and start working with the product. Includes basic operations, typical measurement examples, and general information, e.g. safety instructions, etc. A printed version is delivered with the instrument.

1.3.2 User manuals and help

Separate manuals for the base unit and the software options are provided for download:

●

Base unit manual Contains the description of all instrument modes and functions. It also provides an introduction to remote control, a complete description of the remote control com-

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1.3.3 Tutorials

Welcome to the OFDM Signal Generation option

Documentation overview

mands with programming examples, and information on maintenance, instrument interfaces and error messages. Includes the contents of the getting started manual.

●

Software option manual Contains the description of the specific functions of an option. Basic information on operating the R&S SMW is not included.

The contents of the user manuals are available as help in the R&S SMW. The help offers quick, context-sensitive access to the complete information for the base unit and the software options.

All user manuals are also available for download or for immediate display on the Internet.

The R&S SMW provides interactive examples and demonstrations on operating the instrument in form of tutorials. A set of tutorials is available directly on the instrument.

1.3.4 Service manual

Describes the performance test for checking compliance with rated specifications, firmware update, troubleshooting, adjustments, installing options and maintenance.

The service manual is available for registered users on the global Rohde & Schwarz information system (GLORIS):

https://gloris.rohde-schwarz.com

1.3.5 Instrument security procedures

Deals with security issues when working with the R&S SMW in secure areas. It is available for download on the Internet.

1.3.6 Printed safety instructions

Provides safety information in many languages. The printed document is delivered with the product.

1.3.7 Data sheets and brochures

The data sheet contains the technical specifications of the R&S SMW. It also lists the options and their order numbers and optional accessories.

The brochure provides an overview of the instrument and deals with the specific characteristics.

See www.rohde-schwarz.com/brochure-datasheet/smw200a

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1.3.8 Release notes and open source acknowledgment (OSA)

1.3.9 Application notes, application cards, white papers, etc.

Welcome to the OFDM Signal Generation option

Notes on screenshots

The release notes list new features, improvements and known issues of the current firmware version, and describe the firmware installation.

The open-source acknowledgment document provides verbatim license texts of the used open source software.

See www.rohde-schwarz.com/firmware/smw200a

These documents deal with special applications or background information on particular topics.

See www.rohde-schwarz.com/application/smw200a and www.rohde-schwarz.com/

manual/smw200a

1.4 Scope

Tasks (in manual or remote operation) that are also performed in the base unit in the same way are not described here.

In particular, it includes:

●

Managing settings and data lists, like saving and loading settings, creating and accessing data lists, or accessing files in a particular directory.

●

Information on regular trigger, marker and clock signals and filter settings, if appropriate.

●

General instrument configuration, such as checking the system configuration, configuring networks and remote operation

●

Using the common status registers

For a description of such tasks, see the R&S SMW user manual.

1.5 Notes on screenshots

When describing the functions of the product, we use sample screenshots. These screenshots are meant to illustrate as many as possible of the provided functions and possible interdependencies between parameters. The shown values may not represent realistic usage scenarios.

The screenshots usually show a fully equipped product, that is: with all options installed. Thus, some functions shown in the screenshots may not be available in your particular product configuration.

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2 About OFDM Signal Generation option

2.1 Required options

About OFDM Signal Generation option

Overview of modulation schemes

The OFDM Signal Generation option enables you to create waveforms according to the following modulation schemes OFDM, f-OFDM, GFDM, UFMC and FBMC.

● Required options.......................................................................................................9

● Overview of modulation schemes............................................................................. 9

● Supported multiple access schemes.......................................................................18

● Physical layer parameterization.............................................................................. 21

●

Generating configuration files for R&S®VSE-K96................................................... 22

The basic equipment layout for generating OFDM signals includes the:

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Standard or wideband Baseband Generator (R&S SMW-B10/-B9)

●

Baseband main module (R&S SMW-B13) or wideband baseband main module (R&S SMW-B13XT)

●

Frequency option (e.g. R&S SMW-B1003)

●

Digital standard OFDM Signal Generation (R&S SMW-K114)

You can generate signals via play-back of waveform files at the signal generator. To create the waveform file using R&S WinIQSIM2, you do not need a specific option.

To play back the waveform file at the signal generator, you have two options:

●

Install the R&S WinIQSIM2 option of the digital standard, e.g. R&S SMW-K255 for playing LTE waveforms

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If supported, install the real-time option of the digital standard, e.g. R&S SMW-K55 for playing LTE waveforms

For more information, see data sheet.

2.2 Overview of modulation schemes

The section gives a brief overview of the techniques and methods.

2.2.1 OFDM

The OFDM modulation is similar to the f-OFDM modulation. Other as in the f-OFDM, the OFDM does not use sub-bands and there is no predefined filtering.

Related settings

●

Chapter 3.2.1, "Physical settings", on page 27

●

Chapter 3.2.3, "Modulation configuration settings", on page 35

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2.2.2 f-OFDM

2.2.3 GFDM

About OFDM Signal Generation option

Overview of modulation schemes

The filtered OFDM (f-OFDM) modulation is a technique similar to the UFMC modulation. Other as in the UFMC, in the f-OFDM uses frame-based filtering.

The method is also known as Spectrum Filtered-OFDM.

Related settings

●

Chapter 3.2.1, "Physical settings", on page 27

●

Chapter 3.2.2, "Filter settings", on page 33

●

Chapter 3.2.3, "Modulation configuration settings", on page 35

The Generalized Frequency Division Multiplexing (GFDM) is a method in which the data is processed on a two-dimensional block structure, both in time and in frequency domain. The GFDM waveform is a non-orthogonal, asynchronous multi-carrier waveform.

In GFDM, subcarriers are independent single carriers; they can have different bandwidth, pulse shape and modulation. Each subcarrier is shaped with an individual transmit filter and then modulated with the subcarrier center frequency. The modulation is performed on a per data block, where the data block size is a configurable value. The commonly used filters are the root raised cosine filters.

The implementation principle is illustrated on Figure 2-1 ([1]).

Figure 2-1: Optimized GFDM transmitter model (from [1])

D = Matrix of input symbols, QPSK, BPSK, or QAM modulated dk= Input vector

k = Number of active subcarrier M = Number of symbols (block size) N = FFT size WM= FFT matrix

(L)

= Upsampling matrix with upsampling factor L

= Diagonal matrix containing the time samples of the filter pulse on its diagonal; the filtering is an ele-

ment wise multiplication in the frequency domain

(k)

= Permutation matrix that applies a frequency shift and moves the block input vectors to the position of

the subcarriers

= IFFT matrix that converts the signal from the frequency domain back to the time domain

x =

NM∑k

(k)ΓR(L)

WMd

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2.2.4 UFMC

About OFDM Signal Generation option

Overview of modulation schemes

As shown on Figure 2-1, in GFDM a time-frequency response is divided into k subcarriers and M symbols.

Related settings

●

Chapter 3.2.1, "Physical settings", on page 27

●

Chapter 3.2.2, "Filter settings", on page 33

●

Chapter 3.2.3, "Modulation configuration settings", on page 35

The Universal Filtered Multi-carrier (UFMC) technique is similar to the known OFDM technique but the UFMC adds one extra filtering step in the signal processing chain.

In UFMC, several consecutive subcarries are bundled into subbands. All subbands have an equal size. Each subband is shaped with an individual Dolph-Chebyshev filter. The modulation uses an optional cyclic prefix for symbol separation.

The system model of UFMC is illustrated on Figure 2-2 ([2]).

Figure 2-2: UFMC system model (from [2])

Subband = Group of consecutive subcarriers B = Number of subbands k = Number of active subcarriers S

IDFT = IFFT operation to transfer the n QAM symbols to the time domain P/S = Parallel to serial conversion F

= Vector of input symbols, QPSK, BPSK, or QAM modulated

= Subband filters with filter length L = Output per subband; outputs are added

The resulting UFMC waveform is a non-orthogonal, asynchronous multi-carrier waveform.

Related settings

●

Chapter 3.2.1, "Physical settings", on page 27

●

Chapter 3.2.2, "Filter settings", on page 33

●

Chapter 3.2.3, "Modulation configuration settings", on page 35

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2.2.5 FBMC

About OFDM Signal Generation option

Overview of modulation schemes

In the Filter Bank Multi-Carrier (FBMC) system, the filtering is applied on a per subcarrier basis.

The FBMC uses a synthesis-analysis filter bank method. Different implementations of FBMC are discussed: Staggered modulated multitone (SMT FBMC), cosine modulated multitone (CMT FBMC), and filtered multitone (FMT FBMC). The main focus is on the SMT FBMC implementation.

In FBMS, adjacent subcarriers do overlap. The number of superimposing symbols in time is referred as overlapping factor K. To maintain the orthogonality between the adjacent subcarrier, the subcarriers are OQAM pre-processed. The cyclic prefix is optional.

The implementation principle is illustrated on ([3]).

Figure 2-3: FBMC transmitter model (from [3])

1 = OQAM pre-processing (symbol staggering) 2 = Synthesis filter bank N = Total number of subcarriers k = 1,..., N is the subcarrier index C2R = Complex to real conversion

⊗

= Complex multiplication by a factor Θ: Shifts the in-phase (I) components of the QAM symbols com-

pared to the quadrature (Q) components IFFT = Inverse fast Fourier transform Ak(z) = Polyphase filtering per subcarrier

N/2 = Upsampling by the factor N/2

-1

= Individual delays, added on each subcarrier

Z s[m] = Transmit signal (the sum of all subcarriers) K = Overlapping factor; defines number of superimposing symbols in time

OQAM pre-processing

Orthogonal QAM is method that shifts the in-phase components of the QAM modulated symbols by T/2 (a half of the symbol length) compared to the quadrature (Q) components. The shift is applied alternating between the subcarrier. For example, if in the

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2.2.6 Filtering

About OFDM Signal Generation option

Overview of modulation schemes

subcarrier N-1 the I component is shifted, then in the neighbor subcarriers (N-2 and N) the Q component is shifted.

Related settings

●

Chapter 3.2.1, "Physical settings", on page 27

●

Chapter 3.2.2, "Filter settings", on page 33

●

Chapter 3.2.3, "Modulation configuration settings", on page 35

The modulation methods utilize filtering for signal shaping, but the filters are applied differently.

Table 2-1: Overview of time and frequency domain filtering per modulation method

Modulation methods

GFDM Per frame Per subcarrier

UFMC Per symbol Per subband

FBMC Per K overlapping sym-

f-OFDM Per frame Per subband

Time domain filtering Frequency domain filtering

Per subcarrier

bols (in this implementation,

K = 4)

OFDM none none

Each modulation method proposes a prototype filter with different characteristics, like filter type and filter length L. The proposed prototype filter types per modulation method are as follows:

●

GFDM: Root cosine, root raised cosine, Dirichlet, and rectangular filters

●

UFMC:

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About OFDM Signal Generation option

Overview of modulation schemes

Dolph-Chebyshev filter

●

FBMC: Root raised cosine, Phydyas filter

●

f-OFDM: Soft truncation filter

●

OFDM No default filter

For UFMC, f-OFDM and OFDM, you can also load a user-defined filter described in a file. See "User filter file format (*.dat files)" on page 16.

Proposed prototype filters

Prototype filters can be designed in several ways, where each approach aims to fully different requirements. In general, filters are designed to have good spectral characteristics and to be easy to be implemented.

GFDM relies on standard filter types with low complexity but with known drawback. A prototype filter with rectangular frequency response suffers from an infinitely long impulse response in time. A root raised cosine filter improves the side lobe suppression.

Figure 2-4: Example of filer characteristics: Root cosine filter with Rolloff Factor = 0.5

A = Filter impulse response B = Filter frequency response 1 = Main lobe 2 = Side lobe suppression

Adjusting the filter parameters can change the filter shape. For example, changing the filter rolloff factor influences the steepness of the filter slopes.

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About OFDM Signal Generation option

Overview of modulation schemes

Figure 2-5: Example of the frequency response of a filter with different rolloff factors

In f-OFDM, the side lobe suppression is improved by applying a soft truncation window function. The modulation uses the commonly known Hamming and Hanning windowing functions. Optionally, the transient response of the filter is cut at the beginning and the end of the signal. The drawback of this operation is that it increases the out-of-band emissions.

Figure 2-6: Effect of the windowing function

1 = Rectangular filter 2 = Hanning window 3 = Hamming window

As shown on Figure 2-6, the soft truncation improves the side lobe suppression but results in a wider main lobe.

UFMC proposes another windowing function with promising characteristics, the DolphChebischev. The Dolph-Chebischev window is characterized by the filter length L in time domain and by the stopband attenuation (that is the desirable side lobe suppression) in the frequency domain.

In FBMC, the initial prototype filter is a root raised cosine (RRC) filter with a rolloff factor of 1. The Phydyas project [3] proposes an extra prototype filter designed using frequency sampling technique. This prototype filter is described by a few filter coefficients that do not depend on the filter length.

For overlapping factor K = 4, the filter coefficients are [[3], 5GNOW D3.x]:

●

P0 = 1

●

P1 = 0.97195981

●

P2 = 1/√(2)

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About OFDM Signal Generation option

Overview of modulation schemes

●

P3 = √(1 - P

)

The filter time response is calculated as:

Figure 2-7: Phydyas filter: Time response calculation

m = 0 to KNc – 2 K = 4 is the overlapping factor

N = Number of subcarriers n = Symbol number T = Symbol period k = Subcarrier number

The stopband attenuation of the Phydyas filter exceeds 60 dB for the frequency range of more than 10 subcarrier spacings [[3], 5GNOW D3.x].

User filter file format (*.dat files)

Additionally to the proposed prototype filter, for UFMC, f-OFDM and OFDM, you can define your own filters.

User filter files are ASCII files with simple format and file extension *.dat.

These files describe filters as a sequence of normalized filter coefficients. Each coefficient is defined as a pair of I and Q samples. The I and Q components alternate at each file line. The I and Q values vary between - 1 and + 1.

User filter file can contain up to 800 coefficients. Once loaded in the software, the file is evaluated and the parameter User Filter Length shows the number of coefficients.

You can create user filter files for example with MATLAB, see for example the following MATLAB script.

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About OFDM Signal Generation option

Overview of modulation schemes

Example: Script that generates user filter file

Function [b, n] = generateUserFilter(filterSets, destPath)

% generateUserFilter returns the filter coefficients of a user-defined (baseband-)filter,

% whose are stored to a .dat file and can be

% loaded as an user filter in R&S SMW

% where:

% filterSets.fftSize is the used FFT size that is used for the OFDM modulation

% filterSets.nOccSubcarrier is the number of occupied subcarriers

% filterSets.transRegionRatio controls the steepness of the filter

% with regards to the ratio of fftSize/2

% filterSets.rp passband ripple in percentage

% filterSets.rs stopband attenuation ripple in percentage

% Example use:

% [b n] = RsFilt.generateUserFilter(struct('fftSize',4096, 'nOccSubcarrier',3376),'.');

% b - complex filter coefficients

% n - filter order

if (~isfield(filterSets,'transRegionRatio'))

filterSets.transRegionRatio = 0.07;

end

if (~isfield(filterSets,'rp'))

filterSets.rp = 0.0001;

end

if (~isfield(filterSets,'rs'))

filterSets.rs = 60;

end

% steepness of filter

transRegion = filterSets.transRegionRatio * filterSets.fftSize/2; %in

%, controls steepness of filter slopes, relative to nyquist frequency

%cutoff frequencies

f = [filterSets.nOccSubcarrier/2 filterSets.nOccSubcarrier/2+transRegion];

%ripples in dB

dev = [(10^(filterSets.rp/20)-1)/(10^(filterSets.rp/20)+1) 10^(-filterSets.rs/20)];

%estimate filter order

[n,fo,ao,w] = firpmord(f,[1 0],dev,filterSets.fftSize);

%make filter symmetric

n = n + mod(n,2)

%generate filter coefficients

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About OFDM Signal Generation option

Supported multiple access schemes

b = firpm(n,fo,ao,w);

% fvtool(b); %displays filter response

%% write filter out into .dat filter coefficient file

coeffsOut = zeros(2*length(b),1);

coeffsOut(1:2:end) = real(b); coeffsOut(2:2:end) = imag(b);

% serialize complex coefficients

if (exist('destPath'))

dlmwrite([destPath '\smw_user_filter_' num2str(length(b))

'taps_' num2str(filterSets.nOccSubcarrier)

'scs_' num2str(filterSets.fftSize) 'fft.dat'],coeffsOut);

end

Related settings

●

Chapter 3.2.2, "Filter settings", on page 33

2.3 Supported multiple access schemes

Multiple access schemes are offered to assign the individual allocations to different users.

Sparse Code Multiple Access (SCMA) is a non-orthogonal multiple access technology that is considered as a key candidate 5G multiple access scheme. This technique adds a CDMA (code division multiple access) component to the orthogonal division multiple access technology OFDMA. SCMA uses multi-layer sparse codewords to separate users that share common time and frequency resources.

In comparison to LTE, SCMA combines modulation mapping and spreading into one operation. Each layer corresponds to unique codebook. The binary input data are mapped directly to the multiple layers complex codeword and then spread over the subcarriers.

SCMA encoding and parameters dependency

The example on Figure 2-8 is an illustration of a codebook.

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R&S®SMW-K114



 





 





About OFDM Signal Generation option

Supported multiple access schemes

Figure 2-8: SCMA encoding parameters

M = 4 is the codebook size (that is the number of codewords) K = 4 is the spreading factor (that is the spread codeword length) N = 2 is the number of non-zero elements K-N = 2 is the number of zero elements

The number of layers J (that is also the number of unique codebooks) is calculated as follows:

The number of layers gives the number of unique combinations that are possible for the given codeword length (K) and number of non-zero elements (N). For K = 4 and N = 2, the maximum number of layers is J = 6. In SCMA, one user can be assigned to several layers, whereas each layer can be assigned to exact one user. Hence, the maximum number of users corresponds to the number of layers and is also 6.

The example on Figure 2-9 illustrates the principle of the SCMA encoding.

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About OFDM Signal Generation option

Supported multiple access schemes

Figure 2-9: SCMA encoding example (K = 4, N = 2, J = 6)

User#x = 6 users Codebook#x = 6 codebooks or layers Bitstream = Binary input data per user, for example User#0 sends bits (0,0) CWy,x = Codeword#y form codebook#x

∑

= Combining the symbols

In this example, each user is assigned to one layer (codebook). The bits that the users are transmitting are highlighted. For example, User#0 sends bits (0,0), that corresponds to codeword CW0,0 from the user-specific codebook#0. The 6 codewords of the 6 users are combined; note that max. 3 symbols overlap. The combined signal of 6 users is spread over the subcarriers; the spreading factor is 4.

SCMA parameterization

The SCMA implementation in R&S SMW-K114 is illustrated Figure 2-8. it uses the following fix parameters:

●

Number of layers = 6

●

Codebook size = 4

●

Spreading factor = 4

Related settings

●

Chapter 3.3.3, "SCMA settings", on page 44

●

Chapter 3.3.2, "Allocations settings", on page 39

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2.4 Physical layer parameterization

About OFDM Signal Generation option

Physical layer parameterization

Data allocation

The input symbols can be modulated in one of the base modulations: BPSK, QPSK, 16QAM, 64QAM, 256QAM and SCMA.

Additionally to the base modulation, you can load files with custom modulated I/Q data and configure allocations modulated in other modulation shemes, like CAZAC sequences for instance. See "Custom I/Q file format (*.iqw or *.dat files)" on page 21.

Related settings:

●

Chapter 3.3, "Allocation settings", on page 37

Custom I/Q file format (*.iqw or *.dat files)

Custom I/Q files are files in one of the following formats:

●

*.dat files

ASCII files with simple format and file extension *.dat. The file content is a sequence of pairs of I and Q samples. The I and Q components alternate at each file line. The I and Q values vary between - 1 and + 1.

●

*.iqw files

Binary files containing complex I/Q data of 32-bit floating point data type. The file contents are I/Q samples described as paired alternating I and Q values (IQIQIQ).

Related settings:

●

"Modulation" on page 41

Cyclic prefix (CP)

A guard time called cyclic prefix (CP) can optionally be used. Note that the CP calculation depends on the used modulation scheme.

Related settings:

●

"Cyclic Prefix Length" on page 29

●

For f-OFDM, also: – "Alt. Cyclic Prefix Length" on page 30 – "CP No. Symbols/Alt. CP No. Symbols" on page 31

Sequence length calculation

The sequence length depends on the modulation method. Sequence length can be expressed as number of symbols or as number of samples.

Calculation of the sequence length as number of samples and per modulation method is as follows:

●

f-OFDM/OFDM

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About OFDM Signal Generation option

Generating configuration files for R&S®VSE-K96

Sequence Length [Samples] = ("Total Number of Subcarriers"*"Sequence Length" [Symbols] + "Cyclic Prefix Length"*"CP No. Symbols" + "Alt. Cyclic Prefix Length"*"Alt. CP No. Symbols")

●

UFMC

Sequence Length [Samples] = "Cyclic Prefix Length" + ("Total Number of Subcarriers" + "Filter Length" - 1)*("Sequence Length" [Symbols]

●

FBMC

– If "Cut Transient Response = Off":

Sequence Length [Samples] = ("Sequence Length" [Symbols] + "Overlap Factor" - 0.5)*"Total Number of Subcarriers" + "Cyclic Prefix Length"

– If "Cut Transient Response = On":

Sequence Length [Samples] = ("Sequence Length" [Symbols] + "Overlap Factor" - 0.5)*"Total Number of Subcarriers" + "Cyclic Prefix Length" - "Total Number of Subcarriers"*"Overlap Factor"

Where "Overlap Factor = 4"

●

GFDM

Sequence Length [Samples] = "Cyclic Prefix Length" + "Total Number of Subcarriers"*"Sequence Length" [Symbols]

2.5

Generating configuration files for R&S

If you generate f-OFDM or OFDM modulated signals, the R&S SMW creates automatically an *.xml settings file. You can use this file for measurements with

Rohde & Schwarz signal analyzer, for example R&S®VSE-K96.

R&S®VSE-K96 processes the waveforms, generated with R&S SMW, differently, depending on the allocation content:

●

Pilots: For f-OFDM and OFDM the R&S®VSE-K96 requires pilot allocations for the signal analysis. The analyzer needs the pilots to decode the channel coding properly.

●

Data: The data allocations contain the resource elements of the corresponding modulation. If you use the generated *.xml settings file, the information on the pilots and data allocations is transmitted automatically.

●

Reserved: Signal analyzer perceives reserved allocations as general OFDM modulated signals. The allocation content can be any user-defined information.

How to create, transfer and use the settings file

1. In the R&S SMW, configure the signal as required.

VSE-K96

2. Enable signal generation ("State > On").

The *.xml settings file is created automatically.

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R&S®SMW-K114

About OFDM Signal Generation option

Generating configuration files for R&S

VSE-K96

It is saved in the user directory as /var/user/K114/ Exported_K114_settings_K96.xml.

3. Connect to the user directory of the R&S SMW via USB, LAN, ftp or any other

access methods. Open, for example, the \\<R&S SMW IP Address>\share\K114\. See also, chapter "File and Data Management" in the R&S SMW user manual.

4. Copy the Exported_K114_settings_K96.xml file

Transfer and load it in the R&S®VSE-K96

Required settings are performed automatically, so that you can start analyzing the signal.

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3 OFDM Signal Generation configuration and

OFDM Signal Generation configuration and settings

General settings

settings

Access:

► Select "Baseband > OFDM Signal Generation".

The remote commands required to define these settings are described in Chapter 3,

"OFDM Signal Generation configuration and settings", on page 24.

Settings:

● General settings......................................................................................................24

● General settings......................................................................................................27

● Allocation settings................................................................................................... 37

● Trigger settings....................................................................................................... 48

● Marker settings........................................................................................................53

● Clock settings..........................................................................................................54

● Local and global connectors settings......................................................................56

3.1 General settings

Access:

► Select "Baseband > OFDM Signal Generation".

This dialog comprises the standard general settings, to the default and the "Save/ Recall" settings, as well as selecting the modulation type and access to dialogs with further settings.

Settings:

State..............................................................................................................................25

Set to Default................................................................................................................ 25

Save/Recall...................................................................................................................25

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OFDM Signal Generation configuration and settings

General settings

Generate Waveform File...............................................................................................25

Modulation Type............................................................................................................26

Export path for XML settings.........................................................................................26

Set to Modulation Default..............................................................................................27

General Settings…........................................................................................................27

Allocation Settings….....................................................................................................27

State

Activates the standard and deactivates all the other digital standards and digital modulation modes in the same path.

Remote command:

[:SOURce<hw>]:BB:OFDM:STATe on page 59

Set to Default

Calls the default settings. The values of the main parameters are listed in the following table.

Parameter Values

State Not affected by "Set to Default"

Modulation Type OFDM

Remote command:

[:SOURce<hw>]:BB:OFDM:PRESet on page 59

Save/Recall

Accesses the "Save/Recall" dialog, that is the standard instrument function for storing and recalling the complete dialog-related settings in a file. The provided navigation possibilities in the dialog are self-explanatory.

The filename and the directory, in which the settings are stored, are user-definable; the file extension is predefined.

See also, chapter "File and Data Management" in the R&S SMW user manual. Remote command:

[:SOURce<hw>]:BB:OFDM:SETTing:CATalog on page 59 [:SOURce<hw>]:BB:OFDM:SETTing:LOAD on page 59 [:SOURce<hw>]:BB:OFDM:SETTing:STORe on page 59 [:SOURce<hw>]:BB:OFDM:SETTing:DEL on page 60

Generate Waveform File

With enabled signal generation, triggers the instrument to save the current settings of an arbitrary waveform signal in a waveform file with predefined extension *.wv. You can define the filename and the directory, in that you want to save the file.

Using the ARB modulation source, you can play back waveform files and/or process the file to generate multi-carrier or multi-segment signals.

Remote command:

[:SOURce<hw>]:BB:OFDM:WAVeform:CREate on page 60

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OFDM Signal Generation configuration and settings

Modulation Type

Selects the modulation type. "OFDM"

"f-OFDM"

"UFMC"

"GFDM"

"FBMC"

Remote command:

[:SOURce<hw>]:BB:OFDM:MODulation on page 60

You can create your own OFDM signal, for example configure the allocations as required. For more information, see Chapter 2.5, "Generating configuration files

for R&S®VSE-K96", on page 22.

Filtered-OFDM The filtered OFDM (f-OFDM) modulation is a technique similar to the

UFMC modulation.

See Chapter 2.2.1, "OFDM", on page 9. An *.xml setting file is created for this modulation type, too. For more information, see Chapter 2.5, "Generating configuration files

for R&S®VSE-K96", on page 22.

Universal Filtered Multi-Carrier UFMC is similar to OFDM but an additional filter is applied to each subband. The modulation used an optional cyclic prefix and a DolphChebyshev filter. See Chapter 2.2.4, "UFMC", on page 11.

Generalized Frequency Division Multiplexing Data processing is performed on a two-dimensional block structure, both in time and frequency domain. Each subcarrier is pulse-shaped with a transmit filter and then modulated. See Chapter 2.2.3, "GFDM", on page 10.

Filter Bank Multi-Carrier This modulation uses staggered modulated multitone filter bank (SMT FBMC) method where the subcarriers are OQAM modulated. See Chapter 2.2.5, "FBMC", on page 12.

General settings

Export path for XML settings

Accesses a standard "File Select" dialog to specify the output path of the created *.xml settings file.

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OFDM Signal Generation configuration and settings

General settings

By default, the output path /var/user/K114-Export and output file Exported_K114_settings_K96.xml is specified.

If modulation "State > On", the *.xml settings file is created automatically. You can use this file for measurements with Rohde & Schwarz signal analyzer, for example R&S®VSE-K96.

See also Example "Default "Exported_K114_settings_K96.xml" file" on page 89. Remote command:

[:SOURce<hw>]:BB:OFDM:OUTPath on page 61

Set to Modulation Default

Calls the default settings for the selected Modulation Type. Remote command:

[:SOURce<hw>]:BB:OFDM:MODPreset on page 60

General Settings…

Accesses the "General Settings" dialog of the selected modulation. For description, see:

●

Chapter 3.2.1, "Physical settings", on page 27

●

Chapter 3.2.2, "Filter settings", on page 33

●

Chapter 3.2.3, "Modulation configuration settings", on page 35

Remote command: n.a.

Allocation Settings…

Accesses the "Allocation Settings" dialog, see Chapter 3.3, "Allocation settings", on page 37.

Remote command: n.a.

3.2 General settings

● Physical settings..................................................................................................... 27

● Filter settings...........................................................................................................33

● Modulation configuration settings............................................................................35

3.2.1 Physical settings

Access:

► Select "OFDM Signal Generation > General Settings".

The physical settings are common to all modulation schemes.

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OFDM Signal Generation configuration and settings

General settings

Settings:

Total Number Of Subcarriers.........................................................................................28

Occupied Number of Subcarriers..................................................................................28

Subcarrier Spacing........................................................................................................29

Sequence Length..........................................................................................................29

Cyclic Prefix Length...................................................................................................... 29

Alt. Cyclic Prefix Length................................................................................................ 30

CP No. Symbols/Alt. CP No. Symbols.......................................................................... 31

DFT-S (skip non-data)...................................................................................................31

Sampling Rate...............................................................................................................32

Occupied Bandwidth..................................................................................................... 32

Number Of Left/Right Guard Subcarriers......................................................................32

Total Number Of Subcarriers

Sets the number of available subcarriers, that is the FFT size. The maximum number of subcarriers depends on the selected "Subcarrier Spacing" as

follows: "Total Number of Subcarriers" * Subcarrier Spacing ≤ Bandwidth

max

The available baseband bandwidth depends on the installed options, see data sheet. See also Chapter 2.4, "Physical layer parameterization", on page 21 for an overview of

this cross-reference between the parameters. Remote command:

[:SOURce<hw>]:BB:OFDM:NSUBcarriers on page 62

Occupied Number of Subcarriers

Sets the number of occupied subcarriers. The maximum number of occupied subcarriers is calculated as follows: "Occupied Number of Subcarriers"

= 0.83 * Total Number Of Subcarriers

max

For the UFMC modulation, the "Occupied Number of Subcarriers" has to be a multiple of the selected Number of Sub-bands.

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OFDM Signal Generation configuration and settings

General settings

See also Chapter 2.4, "Physical layer parameterization", on page 21 for an overview of this cross-reference between the parameters.

Remote command:

[:SOURce<hw>]:BB:OFDM:NOCCupied on page 62

Subcarrier Spacing

Sets the frequency distance between the carrier frequencies of the subcarriers. The subcarriers are evenly distributed within the available bandwidth. All subcarriers

span the same bandwidth and there is no frequency gap between adjacent subcarriers. Hence, the parameter "Subcarrier Spacing" sets also the subcarrier bandwidth.

See also Chapter 2.4, "Physical layer parameterization", on page 21 for an overview of this cross-reference between the parameters.

Remote command:

[:SOURce<hw>]:BB:OFDM:SCSPace on page 62

Sequence Length

Sets the sequence length of the signal in number of symbols. See also "Sequence length calculation" on page 21. Remote command:

[:SOURce<hw>]:BB:OFDM:SEQLength on page 62

Cyclic Prefix Length

Sets the cyclic prefix (CP) length as number of samples. The maximum number of symbols that can be used as a CP is calculated as follows: "Cyclic Prefix Length"

= 0.5*Total Number Of Subcarriers

max

The cyclic prefix calculation depends on the modulation scheme:

●

f-OFDM/OFDM

Similar to the calculation in LTE, the cyclic prefix is applied as a cyclic extension to each symbol.

Figure 3-1: Principle of cyclic prefix calculation in f-OFDM/OFDM (default configuration with CP

CP = Cyclic prefix CP Length = Selected number of samples Subcarriers = Total Number Of Subcarriers Sequence Length = Selected number of symbols; 8 symbols in this example Total number of samples = Calculated as described in "Sequence length calculation" on page 21

No. Symbols = 0, Alt. Cyclic Prefix Length = 0)

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OFDM Signal Generation configuration and settings

General settings

To apply different CP to a certain number of symbols or to use an alternating CP pattern, use the combination of the parameters Alt. Cyclic Prefix Length and CP

No. Symbols/Alt. CP No. Symbols.

●

UFMC, GFDM, FBMC

If a "CP Length ≠ 0" is selected, then last samples of the complete signal are prepended to the signal.

Figure 3-2: Principle of cyclic prefix calculation in UFMC, GFDM, and FBMC

Remote command:

[:SOURce<hw>]:BB:OFDM:CPLength on page 63

Alt. Cyclic Prefix Length

For f-OFDM/OFDM, you can modify the default CP assignment where the same CP is applied to each symbol and enable additional alternative CP, see Figure 3-3.

Both cyclic prefix (CP) lengths are set as number of samples. The parameters CP No.

Symbols/Alt. CP No. Symbols determine for how many symbols each of the CP is

applied. These parameters thus define a pattern of alternating cyclic prefixes.

Figure 3-3: Dynamic cyclic prefixes in f-OFDM/OFDM (example with Alt. Cyclic Prefix Length

Prefix Length, CP No. Symbols = 1, Alt. CP No. Symbols = 7)

CP = Cyclic prefix CP Length = CP duration as number of samples, e.g 160 samples Alt. CP Length = Duration of the alternative CP as number of samples, e.g 144 samples CP No. Symbol = 1 (number of symbols for that the selected CP length is applied). Alt. CP No. Symbols = 7 (number of symbols for that the selected Alt. CP length is applied).

≠

Cyclic

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OFDM Signal Generation configuration and settings

General settings

Sequence Length = Selected number of symbols; 8 symbols in this example Subcarriers = Occupied Number of Subcarriers, e.g. 400 so that the Occupied Bandwidth = 20

MHz

Total number of samples = Calculated as described in "Sequence length calculation" on page 21

Remote command:

[:SOURce<hw>]:BB:OFDM:ACPLength on page 63

CP No. Symbols/Alt. CP No. Symbols

For f-OFDM/OFDM, these parameters determine for how many symbols each of the CP (Cyclic Prefix Length and Alt. Cyclic Prefix Length) is applied.

3.2.2 Filter settings

OFDM Signal Generation configuration and settings

General settings

Access:

1. Select "OFDM Signal Generation > Modulation Type > for example UFMC".

2. Select "OFDM Signal Generation > General Settings".

3. Select "Filter".

The filter settings depend on the selected modulation scheme. See also Chapter 2.2.6, "Filtering", on page 13.

Settings:

Filter Type..................................................................................................................... 33

Rolloff Factor.................................................................................................................34

Filter Length.................................................................................................................. 34

Stopband Attenuation....................................................................................................34

Windowing Method........................................................................................................34

Cut Transient Response................................................................................................35

User Filter Length..........................................................................................................35

Load User Filter.............................................................................................................35

Filter Type

Sets the filter type. The available types depend on the selected "Modulation Type":

●

OFDM None

●

f-OFDM: Soft truncation filter

●

GFDM: Root cosine, root raised cosine, Dirichlet, and rectangular filters

●

UFMC: Dolph-Chebyshev filter

●

FBMC:

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OFDM Signal Generation configuration and settings

General settings

Root raised cosine, Phydyas filter Additionally, you can load a user-defined filter described in a file. See also Chapter 2.2.6, "Filtering", on page 13. Remote command:

[:SOURce<hw>]:BB:OFDM:FILTer:TYPE on page 66

Rolloff Factor

Sets the filter parameter. The rolloff factor affects the steepness of the filter slopes. A "Rolloff Factor = 0" results

in the steepest slopes; values near to 1 make the slopes more flat.

Figure 3-4: Example of the frequency response of a filter with different rolloff factors

Remote command:

[:SOURce<hw>]:BB:OFDM:FILTer:ROLLoff on page 66

Filter Length

Set the number of filter tabs and changes the filter shape in the time domain. Remote command:

[:SOURce<hw>]:BB:OFDM:FILTer:LENGth on page 66

Stopband Attenuation

The UFMC modulation uses a Dolph-Chebyshev window to filter each subband. The following parameters affect the shape of the Dolph-Chebyshev window:

●

Filter Length (L) changes the shape in the time domain

●

"Stopband Attenuation" (sidelobe attenuation) affects the shape in the frequency

domain. See also "Proposed prototype filters" on page 14. Remote command:

[:SOURce<hw>]:BB:OFDM:FILTer:SBATtenuation on page 66

Windowing Method

The f-OFDM modulation uses a soft truncation window to filter each subband. The windowing model affects the shape in the frequency domain. The Hamming win-

dowing method, for example, is optimized for better side-lobes suppression.

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OFDM Signal Generation configuration and settings

General settings

The following parameters also affect the shape of the filter window:

●

Filter Length

●

Cut Transient Response

See also "Proposed prototype filters" on page 14. Remote command:

[:SOURce<hw>]:BB:OFDM:FILTer:WINDowing on page 67

Cut Transient Response

Cuts the transient response of the filtering operation at the beginning and end of the signal. The length of the cut samples depends on the selected Filter Length.

See also "Proposed prototype filters" on page 14. Remote command:

[:SOURce<hw>]:BB:OFDM:FILTer:CUTTrans on page 67

User Filter Length

Indicates the number of filter coefficients in the user filter file, see "User filter file format

(*.dat files)" on page 16.

Remote command:

[:SOURce<hw>]:BB:OFDM:FILTer:ULENgth? on page 68

Load User Filter

Accesses the dialog "Select List File User Filter" for loading a user-defined filter file. User filters are described in files with extension *.dat, see "User filter file format (*.dat

files)" on page 16.

Remote command:

[:SOURce<hw>]:BB:OFDM:FILTer:USELection on page 67 [:SOURce<hw>]:BB:OFDM:FILTer:UCATalog? on page 67

3.2.3 Modulation configuration settings

Access:

1. Select "OFDM Signal Generation > Modulation Type > for example UFMC".

2. Select "OFDM Signal Generation > General Settings".

3. Select "Modulation Configuration".

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OFDM Signal Generation configuration and settings

General settings

The provided settings depend on the selected modulation type.

Settings:

Number of Sub-bands...................................................................................................36

Subcarriers per Subband.............................................................................................. 36

Subband Filter Pre-equalization....................................................................................36

Data Block Size.............................................................................................................37

Overlap Factor K...........................................................................................................37

Number of Sub-bands

In UFMC and f-OFDM, sets the number of sub-bands. A sub-band is a group of adjacent subcarriers. The number of subcarriers in one sub-

band is calculated as follows:

Subcarriers per Subband = Occupied Number of Subcarriers / Number of Sub-bands

Remote command:

[:SOURce<hw>]:BB:OFDM:UFMC:NSUBand on page 69 [:SOURce<hw>]:BB:OFDM:FOFDm:NSUBand on page 69

Subcarriers per Subband

In UFMC and f-OFDM, indicates the number of adjacent subcarriers within a sub-band. It is calculated as:

Subcarriers per Subband = Occupied Number of Subcarriers / Number of Sub-bands

Remote command:

[:SOURce<hw>]:BB:OFDM:SUBCarriers? on page 68

Subband Filter Pre-equalization

In UFMC, applies a filter pre-equalization according to the specification 5GNOW D3.x. It equalizes the non-ideal filter response of the subband-filter by increasing or decreas-

ing the power of outer and inner subcarriers of a subband.

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Table 3-1: Effect of filter pre-equaölization on the UFMC modulation ("Number of Subbands = 4")

"Subband Filter Pre-equalization > Off" "Subband Filter Pre-equalization > On"

Remote command:

[:SOURce<hw>]:BB:OFDM:UFMC:PREequal on page 69

Data Block Size

In GFDM, sets data block size M in terms of symbols per data block. The "Data Block Size" is a value between 1 and the Sequence Length value and must

be a common divisor of the "Sequence Length". Remote command:

[:SOURce<hw>]:BB:OFDM:GFDM:DBSYmbols on page 68

OFDM Signal Generation configuration and settings

Allocation settings

Overlap Factor K

Describes the number of overlapping (superimposed) symbols in time on the same subcarrier.

This parameter influences the filter length. Remote command:

n.a.

3.3 Allocation settings

Access:

1. Select "OFDM Signal Generation > Modulation Type > for example UFMC".

2. Select "OFDM Signal Generation > Allocation Settings".

The main part of the "Allocation Settings" dialog is the allocation table where the individual allocations can be defined. Each allocation can use different (base) modulation type and data source. The allocations can differ in the used number of symbols, the occupied number of subcarriers, and the individual position within the time-frequency grid. Different users can be assigned to the allocations, where each user uses individual data source and multiple access schemes.

The "Time Plan" shows individual allocations on the time-frequency grid.

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3.3.1 User settings

OFDM Signal Generation configuration and settings

Allocation settings

Settings:

● User settings........................................................................................................... 38

● Allocations settings................................................................................................. 39

● SCMA settings........................................................................................................ 44

● Time plan................................................................................................................ 46

Access:

1. Select the modulation type, for example, "OFDM Signal Generation" > "Modulation

Type" > "UFMC".

2. Select "OFDM Signal Generation > Allocation Settings".

Settings:

Number of Users...........................................................................................................38

User...............................................................................................................................38

Data Source.................................................................................................................. 38

ρ / dB.............................................................................................................................39

Number of Users

Indicates the maximum number of users that can be configured. Any configured user can be deactivated.

User

Displays the consecutive number of the user.

Data Source

The following standard data sources are available:

●

"All 0, All 1"

An internally generated sequence containing 0 data or 1 data.

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OFDM Signal Generation configuration and settings

Allocation settings

●

"PNxx"

An internally generated pseudo-random noise sequence.

●

"Pattern"

An internally generated sequence according to a bit pattern.

Use the "Pattern" box to define the bit pattern.

●

"Data List/Select DList"

A binary data from a data list, internally or externally generated.

Select "Select DList" to access the standard "Select List" dialog.

– Select the "Select Data List > navigate to the list file *.dm_iqd > Select" to

select an existing data list.

– Use the "New" and "Edit" functions to create internally new data list or to edit

an existing one.

– Use the standard "File Manager" function to transfer external data lists to the

instrument.

3.3.2 Allocations settings

Access:

1. Select "OFDM Signal Generation > Modulation Type > for example UFMC".

2. Select "OFDM Signal Generation > Allocation Settings".

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OFDM Signal Generation configuration and settings

Allocation settings

3. Select "Allocations".

In this dialog, you can configure the individual allocations so that each allocation

uses different base modulation type, data source, power offset and time-frequency

resources.

Use the Time plan to visualize the resulting resource grid assignments.

Settings:

Number of Allocations...................................................................................................40

Alloc. #.......................................................................................................................... 40

Modulation.....................................................................................................................41

No. SC...........................................................................................................................41

No. Sym........................................................................................................................ 41

Offset SC.......................................................................................................................41

Offset Sym.....................................................................................................................41

Phys Bits....................................................................................................................... 41

Data Source.................................................................................................................. 41

ρ / dB.............................................................................................................................42

Content Type.................................................................................................................42

State..............................................................................................................................43

Conflict.......................................................................................................................... 44

Number of Allocations

Sets the number of scheduled allocations. Remote command:

[:SOURce<hw>]:BB:OFDM:NALLoc on page 74

Alloc. #

Displays the consecutive number of the allocation. Remote command:

n.a.

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OFDM Signal Generation configuration and settings

Allocation settings

Modulation

The input symbols can be modulated in one of the base modulations: BPSK, QPSK, 16QAM, 64QAM, 256QAM and SCMA.

Also, you can load files with custom modulated I/Q data. Custom I/Q files are files with predefined file syntax and extension, see "Custom I/Q file format (*.iqw or *.dat files)" on page 21.

If "Data Source > User x", changing this parameter sets also the parameter "Modulation" of all allocations, belonging to the same user.

Remote command:

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:MODulation on page 74

No. SC

Sets the number of allocated subcarriers, that is the allocated bandwidth. If SCMA is used, the number of allocated subcarries must be a multiple of the spread-

ing factor K (see Spreading Factor K). Remote command:

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCNO on page 74

No. Sym.

Sets the allocation size in the time domain as number of symbols. Remote command:

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SYNO on page 74

Offset SC

Sets the start subcarrier of the selected allocation. It shifts the allocated bandwidth in the frequency domain.

Remote command:

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCOFfset on page 75

Offset Sym.

Sets the start symbol of the selected allocation. It shifts the allocation in the time domain.

Remote command:

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SYOFfset on page 75

Phys Bits

Displays the allocation size in bits. The value depends on the allocation size and the used modulation. Remote command:

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:PHYSbits? on page 75

Data Source

Selects the data source for the allocation. "User x"

Use the User settings dialog to configure the data sources for the "User 1 to 6".

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OFDM Signal Generation configuration and settings

Allocation settings

"Config"

"I/Q Source"

"All 0, All 1, PNxx, Pattern, Data List/Select DList"

If "Modulation > SCMA", opens a dialog with further settings, see

Chapter 3.3.3, "SCMA settings", on page 44.

For "Modulation > Custom I/Q", select "Select IQ Source" to access the standard "Select List" dialog. Select the "Select IQ Source > navigate to a *.dat or *.iqw file > Select" to select an existing file. Use the standard "File Manager" function to transfer external data lists to the instrument. For information on the file format, see "Custom I/Q file format (*.iqw

or *.dat files)" on page 21.

The following standard data sources are available:

●

"All 0, All 1" An internally generated sequence containing 0 data or 1 data.

●

"PNxx" An internally generated pseudo-random noise sequence.

●

"Pattern" An internally generated sequence according to a bit pattern. Use the "Pattern" box to define the bit pattern.

●

"Data List/Select DList" A binary data from a data list, internally or externally generated. Select "Select DList" to access the standard "Select List" dialog. – Select the "Select Data List > navigate to the list file *.dm_iqd

> Select" to select an existing data list.

– Use the "New" and "Edit" functions to create internally new

data list or to edit an existing one.

– Use the standard "File Manager" function to transfer external

data lists to the instrument.

3.3.3 SCMA settings

OFDM Signal Generation configuration and settings

Allocation settings

Remote command:

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:STATe on page 77

Conflict

Indicates a conflict, if allocations overlap. To visualize the allocations, use the Time plan. Remote command:

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:CONFlict? on page 77

Access:

1. Select "OFDM Signal Generation > Modulation Type > for example UFMC".

2. Select "OFDM Signal Generation > Allocation Settings > Allocations".

3. Select "Alloc# > Modulation > SCMA".

4. Select "Data Source > Config".

The "Codebook" dialog opens.

5. Select "Layer Mapping".

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OFDM Signal Generation configuration and settings

Allocation settings

Settings:

Codebook......................................................................................................................45

└ Spreading Factor K.........................................................................................45

└ Codebook Size M............................................................................................45

└ Number of Layers J.........................................................................................45

Layer Mapping.............................................................................................................. 46

└ Layer...............................................................................................................46

└ User................................................................................................................ 46

└ ρ / dB...............................................................................................................46

└ State................................................................................................................46

Codebook

Displays the codebook parameters. See Figure 2-8.

Spreading Factor K ← Codebook

Displays the used spreading factor K. Remote command:

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:SPRead? on page 78

Codebook Size M ← Codebook

Displays the codebook size M. Remote command:

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:CODebook? on page 78

Number of Layers J ← Codebook

Displays the resulting number of layers J.

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

 





 





OFDM Signal Generation configuration and settings

Allocation settings

The number of layers (that is also the number of codebooks) is calculated as follows:

Where:

●

K is the spreading factor

●

N is the number of non-zero elements, see Figure 2-8. With the predefined settings, the number of layers is J = 6. Remote command:

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:NLAYers? on page 78

Layer Mapping

Comprises the user to layer-mapping settings:

Layer ← Layer Mapping

Indicates the layer number. With the predefined settings, the number of layers is J = 6, see Number of Layers J.

User ← Layer Mapping

Maps the users to the layers and sets the codebook per user, see for example Fig-

ure 2-9.

One user can be assigned to several layers, whereas each layer can be assigned to exact one user.

Remote command:

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:LAYer<st0>:USER on page 79

ρ / dB ← Layer Mapping

Provided for future use. Remote command:

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:LAYer<st0>:PWR? on page 79

State ← Layer Mapping

Enables the individual layers (codebooks). Remote command:

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:LAYer<st0>:STATe on page 79

3.3.4 Time plan

Access:

1. Select "OFDM Signal Generation > Modulation Type > for example UFMC".

2. Select "OFDM Signal Generation > Allocation Settings".

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OFDM Signal Generation configuration and settings

Allocation settings

3. Select "Time Plan".

The x-axis shows allocation in the time domain, expressed in both time and num-

ber of symbols. The y-axis shows the occupied subcarriers as smallest allocation

granularity in the frequency domain.

Settings:

1st Symbol.................................................................................................................... 47

Symbols........................................................................................................................ 47

Detach Time Plan..........................................................................................................47

1st Symbol

Selects the number of the first displayed symbol. Remote command:

n.a.

Symbols

Sets the number of displayed symbols. The maximum number of symbols is set with the parameter Sequence Length. Remote command:

n.a.

Detach Time Plan

Opens the time plan in a separate window. Remote command:

n.a.

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3.4 Trigger settings

OFDM Signal Generation configuration and settings

Trigger settings

Access:

► Select "OFDM Signal Generation > Trigger In".

This tab provides access to the settings necessary to select and configure the trig-

ger, like trigger source and mode, and to arm or trigger an internal trigger manually.

The current signal generation status is displayed in the header of the tab together

with information on the enabled trigger mode. As in the "Marker" and "Clock" tabs,

this tab provides also access to the settings of the related connectors.

This section focuses on the available settings. For information on how these settings affect the signal, refer to section "Basics on ..."

in the R&S SMW user manual.

Routing and enabling a trigger

The provided trigger signals are not dedicated to a particular connector. Trigger signals can be mapped to one or more USER x or T/M connectors.

Use the Local and global connectors settings to configure the signal mapping, the polarity, the trigger threshold and the input impedance of the input connectors.

To route and enable a trigger signal, perform the following general steps:

●

Define the signal source and the effect of a trigger event.

Select the "Trigger In > Mode" and "Trigger In > Source".

●

Define the connector where the selected signal is provided.

Use the "Global Connectors" settings.

Settings:

Trigger Settings Common to All Basebands................................................................. 49

└ Trigger Mode...................................................................................................49

└ Signal Duration Unit........................................................................................49

└ Trigger Signal Duration...................................................................................50

└ Running/Stopped............................................................................................ 50

└ Arm................................................................................................................. 50

└ Execute Trigger...............................................................................................50

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OFDM Signal Generation configuration and settings

Trigger settings

└ Trigger Source................................................................................................ 50

└ Sync. Output to External Trigger/Sync. Output to Trigger...............................51

└ External / Trigger Inhibit..................................................................................52

(External) Delay Unit.....................................................................................................52

(Specified) External Delay/(Specified) Trigger Delay....................................................52

Actual Trigger Delay/Actual External Delay.................................................................. 52

Trigger Settings Common to All Basebands

To enable simultaneous signal generation in all basebands, the R&S SMW couples the trigger settings in the available basebands in any instrument's configuration involving signal routing with signal addition. For example, in MIMO configuration, routing and summing of basebands or of streams.

The icon indicates that common trigger settings are applied. You can access and configure the common trigger source and trigger mode settings in

any of the basebands. An arm or a restart trigger event applies to all basebands, too. You can still apply different delay to each of the triggers individually.

Trigger Mode ← Trigger Settings Common to All Basebands

Selects trigger mode, i.e. determines the effect of a trigger event on the signal generation.

For more information, refer to chapter "Basics" in the R&S SMW user manual.

●

"Auto" The signal is generated continuously.

●

"Retrigger" The signal is generated continuously. A trigger event (internal or external) causes a restart.

●

"Armed Auto" The signal is generated only when a trigger event occurs. Then the signal is generated continuously. An "Arm" stops the signal generation. A subsequent trigger event (internal or external) causes a restart.

●

"Armed Retrigger" The signal is generated only when a trigger event occurs. Then the signal is generated continuously. Every subsequent trigger event causes a restart. An "Arm" stops signal generation. A subsequent trigger event (internal or external) causes a restart.

●

"Single" The signal is generated only when a trigger event occurs. Then the signal is generated once to the length specified at "Signal Duration". Every subsequent trigger event (internal or external) causes a restart.

Remote command:

[:SOURce<hw>]:BB:OFDM[:TRIGger]:SEQuence on page 81

Signal Duration Unit ← Trigger Settings Common to All Basebands

Defines the unit for describing the length of the signal sequence to be output in the "Single" trigger mode.

Remote command:

[:SOURce<hw>]:BB:OFDM:TRIGger:SLUNit on page 82

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OFDM Signal Generation configuration and settings

Trigger settings

Trigger Signal Duration ← Trigger Settings Common to All Basebands

Enters the length of the signal sequence to be output in the "Single" trigger mode. Use this parameter to output part of the signal deliberately, an exact sequence of the

signal, or a defined number of repetitions of the signal. Remote command:

[:SOURce<hw>]:BB:OFDM:TRIGger:SLENgth on page 82

Running/Stopped ← Trigger Settings Common to All Basebands

With enabled modulation, displays the status of signal generation for all trigger modes.

●

"Running" The signal is generated; a trigger was (internally or externally) initiated in triggered mode.

●

"Stopped" The signal is not generated and the instrument waits for a trigger event.

Remote command:

[:SOURce<hw>]:BB:OFDM:TRIGger:RMODe? on page 82

Arm ← Trigger Settings Common to All Basebands

Stops the signal generation until subsequent trigger event occurs. Remote command:

[:SOURce<hw>]:BB:OFDM:TRIGger:ARM:EXECute on page 83

Execute Trigger ← Trigger Settings Common to All Basebands

For internal trigger source, executes trigger manually. Remote command:

[:SOURce<hw>]:BB:OFDM:TRIGger:EXECute on page 82

Trigger Source ← Trigger Settings Common to All Basebands

The following sources of the trigger signal are available:

●

"Internal" The trigger event is executed manually by the "Execute Trigger".

●

"Internal (Baseband A/B)" The trigger event is provided by the trigger signal from the other basebands. If common trigger settings are applied, this trigger source is disabled.

●

"External Global Trigger" The trigger event is the active edge of an external trigger signal provided and configured at the USER x connectors.

●

"External Local Trigger" The trigger event is the active edge of an external trigger signal provided and configured at the local T/M/C connector. With coupled trigger settings, the signal has to be provided at the T/M/C1/2/3 connectors.

●

"External Local Clock" The trigger event is the active edge of an external local clock signal provided and configured at the local T/M/C connector. With coupled trigger settings, the signal has to be provided at the T/M/C1 connector.

●

"Baseband Sync In"

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OFDM Signal Generation configuration and settings

Trigger settings

Option: R&S SMW-B9 In primary-secondary instrument mode, secondary instruments are triggered by the active edge of the synchronization signal.

"External Local Clock/Trigger" require R&S SMW-B10. Remote command:

[:SOURce<hw>]:BB:OFDM:TRIGger:SOURce on page 81

Sync. Output to External Trigger/Sync. Output to Trigger ← Trigger Settings Common to All Basebands

Enables signal output synchronous to the trigger event.

●

"On" Corresponds to the default state of this parameter. The signal calculation starts simultaneously with the trigger event. Because of the processing time of the instrument, the first samples are cut off and no signal is output. After elapsing of the internal processing time, the output signal is synchronous to the trigger event.

●

"Off" The signal output begins after elapsing of the processing time. Signal output starts with sample 0. The complete signal is output. This mode is recommended for triggering of short signal sequences. Short sequences are sequences with signal duration comparable with the processing time of the instrument.

In primary-secondary instrument mode, this setting ensures that once achieved, synchronization is not lost if the baseband signal sampling rate changes.

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OFDM Signal Generation configuration and settings

Trigger settings

Remote command:

[:SOURce<hw>]:BB:OFDM:TRIGger:EXTernal:SYNChronize:OUTPut

on page 83

External / Trigger Inhibit ← Trigger Settings Common to All Basebands

Applies for external trigger signal or trigger signal from the other path. Sets the duration with that any following trigger event is suppressed. In "Retrigger"

mode, for example, a new trigger event does not cause a restart of the signal generation until the specified inhibit duration does not expire.

For more information, see chapter "Basics" in the R&S SMW user manual. Remote command:

[:SOURce<hw>]:BB:OFDM:TRIGger[:EXTernal]:INHibit on page 85 [:SOURce<hw>]:BB:OFDM:TRIGger:OBASeband:INHibit on page 84

(External) Delay Unit

Determine whatever the trigger delay is expressed in samples or directly defined as a time period (seconds).

To specify the delay, use the parameter (Specified) External Delay/(Specified) Trigger

Delay.

The parameter Actual Trigger Delay/Actual External Delay displays the delay converted in time.

Remote command:

[:SOURce<hw>]:BB:OFDM:TRIGger:DELay:UNIT on page 83

(Specified) External Delay/(Specified) Trigger Delay

The name of the parameter and the units the delay is expressed in, changes depending on the parameter (External) Delay Unit.

Delays the trigger event of the signal from:

●

The external trigger source

●

The other path

●

The other basebands (internal trigger), if common trigger settings are used.

Use this setting to:

●

Synchronize the instrument with the device under test (DUT) or other external devices

●

Postpone the signal generation start in the basebands compared to each other

●

Compensate delays and align the signal generation start in multi-instrument setup

For more information, see chapter "Basics on ..." in the R&S SMW user manual. The parameter displays the delay converted in time. Remote command:

[:SOURce<hw>]:BB:OFDM:TRIGger[:EXTernal]:DELay on page 84 [:SOURce<hw>]:BB:OFDM:TRIGger:EXTernal:TDELay on page 85 [:SOURce<hw>]:BB:OFDM:TRIGger:OBASeband:DELay on page 83 [:SOURce<hw>]:BB:OFDM:TRIGger:OBASeband:TDELay on page 84

Actual Trigger Delay/Actual External Delay

Indicates the resulting trigger delay in "Time" unit.

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3.5 Marker settings

OFDM Signal Generation configuration and settings

Marker settings

Remote command:

[:SOURce<hw>]:BB:OFDM:TRIGger:EXTernal:RDELay? on page 85 [:SOURce<hw>]:BB:OFDM:TRIGger:OBASeband:RDELay? on page 84

Access:

► Select "OFDM Signal Generation > Marker".

This tab provides access to the settings necessary to select and configure the marker output signal, like the marker mode or marker delay settings.

This section focuses on the available settings. For information on how these settings affect the signal, refer to section "Basics on ..."

in the R&S SMW user manual.

Routing and enabling a marker

The provided marker signals are not dedicated to a particular connector. They can be mapped to one or more USER x or T/M connectors.

To route and enable a marker signal, perform the following general steps:

●

Define the shape of the generated marker, i.e. select the "Marker > Mode".

●

Define the connector where the selected signal is provided. Use the Local and global connectors settings.

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OFDM Signal Generation configuration and settings

Clock settings

Settings:

Marker Mode.................................................................................................................54

Rise/Fall Offset..............................................................................................................54

Marker x Delay..............................................................................................................54

Marker Mode

Marker configuration for up to 3 markers. The settings are used to select the marker mode defining the shape and periodicity of the markers. The contents of the dialog change with the selected marker mode.

"Restart (ARB)"

A marker signal is generated at the start of each ARB sequence.

Remote command:

[:SOURce<hw>]:BB:OFDM:TRIGger:OUTPut<ch>:MODE on page 86

Rise/Fall Offset

Shifts the rising or falling ramp of the marker by the selected number of samples. Positive values shift the rising ramp to later positions; negative values shift it to earlier positions.

Remote command:

[:SOURce<hw>]:BB:OFDM:TRIGger:OUTPut<ch>:FOFFset on page 86 [:SOURce<hw>]:BB:OFDM:TRIGger:OUTPut<ch>:ROFFset on page 86

Marker x Delay

Delays the marker signal at the marker output relative to the signal generation start. Variation of the parameter "Marker x Delay" causes signal recalculation. Remote command:

[:SOURce<hw>]:BB:OFDM:TRIGger:OUTPut<ch>:DELay on page 87

3.6 Clock settings

Access:

► Select "OFDM Signal Generation > Clock".

This tab provides access to the settings necessary to select and configure the clock signal, like the clock source and clock mode.

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OFDM Signal Generation configuration and settings

Clock settings

This section focuses on the available settings. For information on how these settings affect the signal, refer to section "Basics on ..."

in the R&S SMW user manual.

Defining the clock

The provided clock signals are not dedicated to a particular connector. They can be mapped to one or more USER x and T/M/C connectors.

Use the Local and global connectors settings to configure the signal mapping, the polarity, the trigger threshold, and the input impedance of the input connectors.

To route and enable a trigger signal, perform the following general steps:

●

Define the signal source, that is select the "Clock > Source".

●

Define the connector where the selected signal is provided. Use the Local and global connectors settings.

Settings:

Clock Source.................................................................................................................55

Clock Mode................................................................................................................... 55

Measured External Clock..............................................................................................55

Clock Source

Selects the clock source.

●

"Internal" The instrument uses its internal clock reference.

●

"External Local Clock" Option: R&S SMW-B10 The instrument expects an external clock reference at the local T/M/C connector.

"External Local Clock" requires R&S SMW-B10. Remote command:

[:SOURce<hw>]:BB:OFDM:CLOCk:SOURce on page 87

Clock Mode

Option: R&S SMW-B10 Sets the type of externally supplied clock. Remote command:

[:SOURce<hw>]:BB:OFDM:CLOCk:MODE on page 87

Measured External Clock

Provided for permanent monitoring of the enabled and externally supplied clock signal. Remote command:

CLOCk:INPut:FREQuency?

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3.7 Local and global connectors settings

OFDM Signal Generation configuration and settings

Local and global connectors settings

Each of the "Trigger In", "Marker" and "Clock" dialogs and the "Trigger Marker Clock" dialog provides a quick access to the related connector settings.

See also chapter "Local and global connectors settings" in the user manual.

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4 Remote-control commands

Remote-control commands

The following commands are required to perform signal generation with the option R&S SMW-K114 in a remote environment. We assume that the R&S SMW has already been set up for remote operation in a network as described in the R&S SMW documentation. A knowledge about the remote control operation and the SCPI command syntax are assumed.

Conventions used in SCPI command descriptions

For a description of the conventions used in the remote command descriptions, see section "Remote Control Commands" in the R&S SMW user manual.

Common Suffixes

The following common suffixes are used in the remote commands:

Suffix Value range Description

ENTity<ch>

SOURce<hw>

OUTPut<ch>

USER<ch>

ALLoc<ch0>

1 to 4 Entity in a multiple entity configuration with separate base-

band sources ENTity3|4 require option R&S SMW-K76

[1] to 4 Available baseband signals

Only SOURce1 possible, if the keyword ENTity is used

1 to 3 Available markers

0 to 5 Available users

0 to 30 Number of allocations

Using SCPI command aliases for advanced mode with multiple entities

You can address multiple entities configurations by using the SCPI commands starting with the keyword SOURce or the alias commands starting with the keyword ENTity.

Note that the meaning of the keyword SOURce<hw> changes in the second case. For details, see section "SCPI Command Aliases for Advanced Mode with Multiple

Entities" in the R&S SMW user manual.

Programming examples

This description provides simple programming examples. The purpose of the examples is to present all commands for a given task. In real applications, one would rather reduce the examples to an appropriate subset of commands.

The programming examples have been tested with a software tool which provides an environment for the development and execution of remote tests. To keep the example as simple as possible, only the "clean" SCPI syntax elements are reported. Non-executable command lines (e.g. comments) start with two // characters.

At the beginning of the most remote control program, an instrument preset or reset is recommended to set the instrument to a definite state. The commands *RST and

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4.1 General commands

Remote-control commands

General commands

SYSTem:PRESet are equivalent for this purpose. *CLS also resets the status registers and clears the output buffer.

The following commands specific to the R&S SMW-K114 option are described here:

● General commands.................................................................................................58

● Physical settings commands...................................................................................61

● Filter commands......................................................................................................65

● Modulation commands............................................................................................68

● User commands......................................................................................................70

● Allocation commands..............................................................................................71

● SCMA commands................................................................................................... 78

● Trigger commands.................................................................................................. 80

● Marker commands.................................................................................................. 86

● Clock commands.....................................................................................................87

Example: Saving current configuration

SOURce1:BB:OFDM:SETTing:STORe "/var/user/5g_ufmc_scma"

*RST

SOURce1:BB:OFDM:SETTing:CATalog?

// Response: "5g_ufmc_scma", "5g"

SOURce1:BB:OFDM:SETTing:LOAD "/var/user/5g_ufmc_scma"

SOURce1:BB:OFDM:NALLoc?

// 6

SOURce1:BB:OFDM:SETTing:DEL "5g"

Example: Saving a configuration to an XML file

SOURce1:BB:OFDM:MODulation OFDM

SOURce1:BB:OFDM:OUTPath "/var/user/K114-Export/"

SOURce1:BB:OFDM:STATe 1

// Query the created *.xml file.

SOURce1:BB:OFDM:OUTPath? "/var/user/K114-Export/Exported_K114_settings_K96"

[:SOURce<hw>]:BB:OFDM:STATe..................................................................................... 59

[:SOURce<hw>]:BB:OFDM:PRESet...................................................................................59

[:SOURce<hw>]:BB:OFDM:SETTing:CATalog.....................................................................59

[:SOURce<hw>]:BB:OFDM:SETTing:LOAD........................................................................59

[:SOURce<hw>]:BB:OFDM:SETTing:STORe......................................................................59

[:SOURce<hw>]:BB:OFDM:SETTing:DEL...........................................................................60

[:SOURce<hw>]:BB:OFDM:WAVeform:CREate...................................................................60

[:SOURce<hw>]:BB:OFDM:MODulation............................................................................. 60

[:SOURce<hw>]:BB:OFDM:MODPreset............................................................................. 60

[:SOURce<hw>]:BB:OFDM:OUTPath.................................................................................61

[:SOURce<hw>]:BB:OFDM:SRATe:VARiation..................................................................... 61

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Remote-control commands

General commands

[:SOURce<hw>]:BB:OFDM:STATe <State>

Activates the standard.

Parameters:

<State> 1 | ON | 0 | OFF

*RST: 0

Example: See Example "Generating a UFMC waveform" on page 71.

Manual operation: See "State" on page 25

[:SOURce<hw>]:BB:OFDM:PRESet

Sets the parameters of the digital standard to their default values (*RST values specified for the commands).

Not affected is the state set with the command SOURce<hw>:BB:OFDM:STATe.

Example:

Usage: Event

Manual operation: See "Set to Default" on page 25

[:SOURce<hw>]:BB:OFDM:SETTing:CATalog

Queries the files with settings in the default directory. Listed are files with the file extension *.c5g.

Example:

Manual operation: See "Save/Recall" on page 25

[:SOURce<hw>]:BB:OFDM:SETTing:LOAD <Filename>

Loads the selected file from the default or the specified directory. Loaded are files with extension *.c5g.

Parameters:

<Filename> string

Example: See Example "Saving current configuration" on page 58.

See Example "Generating a UFMC waveform" on page 71.

See Example "Saving current configuration" on page 58.

file name or complete file path; file extension can be omitted

Manual operation: See "Save/Recall" on page 25

[:SOURce<hw>]:BB:OFDM:SETTing:STORe <Filename>

Stores the current settings into the selected file; the file extension (*.c5g) is assigned automatically.

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Remote-control commands

General commands

Parameters:

<Filename> string

file name or complete file path

Example: See Example "Saving current configuration" on page 58.

Manual operation: See "Save/Recall" on page 25

[:SOURce<hw>]:BB:OFDM:SETTing:DEL <Filename>

Deletes the selected file from the default or specified directory. Deleted are files with the file extension *.c5g.

Parameters:

<Filename> string

file name or complete file path; file extension can be omitted

Example: See Example "Saving current configuration" on page 58.

Manual operation: See "Save/Recall" on page 25

[:SOURce<hw>]:BB:OFDM:WAVeform:CREate <Filename>

Stores the current settings as an ARB signal in a waveform file (*.wv).

Parameters:

<Filename> string

file name or complete file path; file extension is assigned automatically

Example: See Example "Generating a UFMC waveform" on page 71.

Manual operation: See "Generate Waveform File" on page 25

[:SOURce<hw>]:BB:OFDM:MODulation <ModType>

Selects the modulation type.

Parameters:

<ModType> UFMC | FBMC | GFDM | FOFDm | OFDM

*RST: OFDM

Example: See Example "Generating a UFMC waveform" on page 71.

Manual operation: See "Modulation Type" on page 26

[:SOURce<hw>]:BB:OFDM:MODPreset

Calls the default settings for the selected modulation type, see [:SOURce<hw>]:BB:

OFDM:MODulation on page 60.

Example:

See Example "Generating a UFMC waveform" on page 71.

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Remote-control commands

Physical settings commands

Usage: Event

Manual operation: See "Set to Modulation Default" on page 27

[:SOURce<hw>]:BB:OFDM:OUTPath <K114OutputPath>

Specifies the output path and output file of the exported OFDM signal generation settings.

By default, the output path is /var/user/K114-Export and the output file is Exported_K114_settings_K96.xml.

See also Example "Default "Exported_K114_settings_K96.xml" file" on page 89.

Parameters:

<K114OutputPath> string

Example: See Example "Saving a configuration to an XML file"

on page 58.

Manual operation: See "Export path for XML settings" on page 26

[:SOURce<hw>]:BB:OFDM:SRATe:VARiation <SymRateVar>

Sets the symbol rate variation of the signal.

Parameters:

<SymRateVar> float

Range: 400 to 4E7 Increment: 1E-3 *RST: 15.360000E6

Example: See Example "Generating a UFMC waveform" on page 71.

4.2 Physical settings commands

[:SOURce<hw>]:BB:OFDM:NSUBcarriers.......................................................................... 62

[:SOURce<hw>]:BB:OFDM:NOCCupied.............................................................................62

[:SOURce<hw>]:BB:OFDM:SCSPace................................................................................ 62

[:SOURce<hw>]:BB:OFDM:SEQLength..............................................................................62

[:SOURce<hw>]:BB:OFDM:CPLength................................................................................63

[:SOURce<hw>]:BB:OFDM:ACPLength..............................................................................63

[:SOURce<hw>]:BB:OFDM:ACPSymbols........................................................................... 63

[:SOURce<hw>]:BB:OFDM:CPSYmbols.............................................................................63

[:SOURce<hw>]:BB:OFDM:DFTS:STATe............................................................................64

[:SOURce<hw>]:BB:OFDM:SAMPling?.............................................................................. 64

[:SOURce<hw>]:BB:OFDM:BWOCcupied?.........................................................................64

[:SOURce<hw>]:BB:OFDM:LGUard?................................................................................. 64

[:SOURce<hw>]:BB:OFDM:RGUard?.................................................................................65

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Remote-control commands

Physical settings commands

[:SOURce<hw>]:BB:OFDM:NSUBcarriers <NoOfSubCarr>

Sets the number of available subcarriers.

Parameters:

<NoOfSubCarr> integer

Range: 64 to 16384 *RST: 64

Example: See Example "Generating a UFMC waveform" on page 71.

Manual operation: See "Total Number Of Subcarriers" on page 28

[:SOURce<hw>]:BB:OFDM:NOCCupied <NumOccSc>

Sets the number of occupied subcarriers.

Parameters:

<NumOccSc> integer

Range: 1 to 13107 *RST: 53

Example: See Example "Generating a UFMC waveform" on page 71.

Manual operation: See "Occupied Number of Subcarriers" on page 28

[:SOURce<hw>]:BB:OFDM:SCSPace <SubCarSp>

Sets the frequency distance between the carrier frequencies of the subcarriers.

Parameters:

<SubCarSp> float

Range: 0.001 to 2 Increment: 1E-6 *RST: 0.3125 Default unit: MHz

Example: See Example "Generating a UFMC waveform" on page 71.

Manual operation: See "Subcarrier Spacing" on page 29

[:SOURce<hw>]:BB:OFDM:SEQLength <SeqLen>

Sets the sequence length of the signal in number of symbols.

Parameters:

<SeqLen> integer

Range: 1 to 1000 *RST: 10

Example: See Example "Generating a UFMC waveform" on page 71.

Manual operation: See "Sequence Length" on page 29

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Physical settings commands

[:SOURce<hw>]:BB:OFDM:CPLength <CpLength>

Sets the cyclic prefix length as number of samples.

Parameters:

<CpLength> integer

Range: 0 to 8192 *RST: 16

Example: See Example "Generating a UFMC waveform" on page 71.

Example: See also [:SOURce<hw>]:BB:OFDM:ACPLength

on page 63.

Manual operation: See "Cyclic Prefix Length" on page 29

[:SOURce<hw>]:BB:OFDM:ACPLength <CpLength>

For f-OFDM/OFDM, enables additional alternative CP.

Parameters:

<CpLength> integer

Range: 0 to 8192 *RST: 0

Example:

Manual operation:

SOURce1:BB:OFDM:MODulation FOFD

SOURce1:BB:OFDM:NSUBcarriers 512

SOURce1:BB:OFDM:NOCCupied 400

SOURce1:BB:OFDM:SCSPace 0.05

SOURce1:BB:OFDM:SEQLength 8

SOURce1:BB:OFDM:CPLength1 160

SOURce1:BB:OFDM:CPSYmbols1 1

SOURce1:BB:OFDM:CPLength2 144

SOURce1:BB:OFDM:CPSYmbols2 7

// the CP in the first symbol is 1600 samples long

// the other 7 symbols use a CP with 144 samples

See "Alt. Cyclic Prefix Length" on page 30

[:SOURce<hw>]:BB:OFDM:ACPSymbols <CPSymbols> [:SOURce<hw>]:BB:OFDM:CPSYmbols <CPSymbols>

For f-OFDM/OFDM, defines number of symbols on that the cyclic prefix/the alternative cyclic prefix is applied.

Parameters:

<CPSymbols> integer

Range: 0 to 8192 *RST: 1

Example: See [:SOURce<hw>]:BB:OFDM:ACPLength on page 63.

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Physical settings commands

Manual operation: See "CP No. Symbols/Alt. CP No. Symbols" on page 31

[:SOURce<hw>]:BB:OFDM:DFTS:STATe <DftsState>

Activates discrete Fourier transform spread OFDM (DFT-s-OFDM) uplink scheme.

Parameters:

<DftsState> 1 | ON | 0 | OFF

*RST: 0

Example: See Example "Generating a UFMC waveform" on page 71.

Manual operation: See "DFT-S (skip non-data)" on page 31

[:SOURce<hw>]:BB:OFDM:SAMPling?

Queries the sampling rate.

Return values:

<SampRate> float

Range: 0.001 to 1000 Increment: 1E-3 *RST: 25.6 Default unit: MHz

Example: See Example "Generating a UFMC waveform" on page 71.

Usage: Query only

Manual operation: See "Sampling Rate" on page 32

[:SOURce<hw>]:BB:OFDM:BWOCcupied?

Queries the occupied bandwidth.

Return values:

<OccBw> float

Range: 0.001 to 1000 Increment: 1E-3 *RST: 20.45 Default unit: MHz

Example: See Example "Generating a UFMC waveform" on page 71.

Usage: Query only

Manual operation: See "Occupied Bandwidth" on page 32

[:SOURce<hw>]:BB:OFDM:LGUard?

Queries the number of left guard subcarriers.

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Filter commands

Return values:

<LeftGuardSC> integer

Range: 0 to 1000 *RST: 52

Example: See Example "Generating a UFMC waveform" on page 71.

Usage: Query only

Manual operation: See "Number Of Left/Right Guard Subcarriers" on page 32

[:SOURce<hw>]:BB:OFDM:RGUard?

Queries the number of right guard subcarriers.

Return values:

<RightGuardSC> integer

Range: 0 to 1000 *RST: 51

Example: See Example "Generating a UFMC waveform" on page 71.

Usage: Query only

Manual operation: See "Number Of Left/Right Guard Subcarriers" on page 32

4.3 Filter commands

Example: Configuring filter settings

SOURce1:BB:OFDM:MODulation FOFD

SOURce1:BB:OFDM:FILTer:LENGth 74

SOURce1:BB:OFDM:FILTer:WINDowing HANN

SOURce1:BB:OFDM:FILTer:CUTTrans 1

SOURce1:BB:OFDM:MODulation GFDM

SOURce1:BB:OFDM:FILTer:TYPE?

// DIR

SOURce1:BB:OFDM:FILTer:ROLLoff?

// 0.1

SOURce1:BB:OFDM:FILTer:TYPE USER

SOURce1:BB:OFDM:FILTer:UCATalog?

// my_filter

SOURce1:BB:OFDM:FILTer:USELection "/var/user/my_filter.dat"

[:SOURce<hw>]:BB:OFDM:FILTer:TYPE............................................................................66

[:SOURce<hw>]:BB:OFDM:FILTer:ROLLoff........................................................................ 66

[:SOURce<hw>]:BB:OFDM:FILTer:LENGth.........................................................................66

[:SOURce<hw>]:BB:OFDM:FILTer:SBATtenuation...............................................................66

[:SOURce<hw>]:BB:OFDM:FILTer:CUTTrans......................................................................67

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Filter commands

[:SOURce<hw>]:BB:OFDM:FILTer:WINDowing................................................................... 67

[:SOURce<hw>]:BB:OFDM:FILTer:UCATalog?.................................................................... 67

[:SOURce<hw>]:BB:OFDM:FILTer:USELection................................................................... 67

[:SOURce<hw>]:BB:OFDM:FILTer:ULENgth?......................................................................68

[:SOURce<hw>]:BB:OFDM:FILTer:TYPE <FilterType>

Sets the baseband filter type.

Parameters:

PHYDyas | NONE *RST: DCH

Example: See Example "Generating a UFMC waveform" on page 71.

Manual operation: See "Filter Type" on page 33

[:SOURce<hw>]:BB:OFDM:FILTer:ROLLoff <RollOff>

Sets the filter parameter.

Parameters:

<RollOff> float

Range: 0 to 1 Increment: 0.001 *RST: 0.1

Example: See Example "Configuring filter settings" on page 65.

Manual operation: See "Rolloff Factor" on page 34

[:SOURce<hw>]:BB:OFDM:FILTer:LENGth <FilterLength>

Sets the filter length.

Parameters:

<FilterLength> integer

Range: 1 to 800 *RST: Deppends on the filter type

Example: See Example "Generating a UFMC waveform" on page 71.

Manual operation: See "Filter Length" on page 34

[:SOURce<hw>]:BB:OFDM:FILTer:SBATtenuation <StBAttenuation>

Sets the attenuation in the filter stop band.

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Filter commands

Parameters:

<StBAttenuation> float

Range: 10 to 120 Increment: 0.001 *RST: 60

Example: See Example "Generating a UFMC waveform" on page 71.

Manual operation: See "Stopband Attenuation" on page 34

[:SOURce<hw>]:BB:OFDM:FILTer:CUTTrans <CutTransResp>

Cuts the transient response of the filtering operation at the beginning and end of the signal.

Parameters:

<CutTransResp> 1 | ON | 0 | OFF

*RST: 0

Example: See Example "Configuring filter settings" on page 65.

Manual operation: See "Cut Transient Response" on page 35

[:SOURce<hw>]:BB:OFDM:FILTer:WINDowing <Windowing>

Sets the windowing method.

Parameters:

<Windowing> NONE | HANNing | HAMMing

*RST: HANNing

Example: See Example "Configuring filter settings" on page 65.

Manual operation: See "Windowing Method" on page 34

[:SOURce<hw>]:BB:OFDM:FILTer:UCATalog?

Queries the user filter files in the default directory. Only files with the file extension *.dat are listed.

Example:

Usage: Query only

Manual operation: See "Load User Filter" on page 35

See Example "Generating a UFMC waveform" on page 71.

[:SOURce<hw>]:BB:OFDM:FILTer:USELection <UserSel>

Loads the selected file from the default or the specified directory. Loaded are files with extension *.dat.

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Modulation commands

Parameters:

<UserSel> string

Complete file path including file name and file extension

Example: See Example "Configuring filter settings" on page 65.

Manual operation: See "Load User Filter" on page 35

[:SOURce<hw>]:BB:OFDM:FILTer:ULENgth?

Queries the filter length.

Return values:

<UserFilterLen> integer

Range: 1 to 800 *RST: 0

Example: See Example "Configuring filter settings" on page 65.

Usage: Query only

Manual operation: See "User Filter Length" on page 35

4.4 Modulation commands

[:SOURce<hw>]:BB:OFDM:SUBCarriers?.......................................................................... 68

[:SOURce<hw>]:BB:OFDM:GFDM:DBSYmbols.................................................................. 68

[:SOURce<hw>]:BB:OFDM:FOFDm:NSUBand................................................................... 69

[:SOURce<hw>]:BB:OFDM:UFMC:NSUBand......................................................................69

[:SOURce<hw>]:BB:OFDM:UFMC:PREequal..................................................................... 69

[:SOURce<hw>]:BB:OFDM:SUBCarriers?

Queries the number of subcarriers per subband.

Return values:

<SubcPerSubband> integer

Range: 1 to 16384 *RST: 1

Example: See Example "Generating a UFMC waveform" on page 71.

Usage: Query only

Manual operation: See "Subcarriers per Subband" on page 36

[:SOURce<hw>]:BB:OFDM:GFDM:DBSYmbols <GFDMDbSymbols>

Sets data block size in terms of symbols per data block.

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Modulation commands

Parameters:

<GFDMDbSymbols> integer

Range: 1 to 50 *RST: 8

Example:

SOURce1:BB:OFDM:GFDM:DBSYmbols 8

Manual operation: See "Data Block Size" on page 37

[:SOURce<hw>]:BB:OFDM:FOFDm:NSUBand <FofdmNSubands>

Sets the number of f-OFDM subbands.

Parameters:

<FofdmNSubands> integer

Range: 1 to 1500 *RST: 6

Example:

SOURce1:BB:OFDM:FOFDm:NSUBand 34

Manual operation: See "Number of Sub-bands" on page 36

[:SOURce<hw>]:BB:OFDM:UFMC:NSUBand <NSubbands>

Sets the number of UFMC subbands.

Parameters:

<NSubbands> integer

Range: 1 to 1500 *RST: 6

Example: See Example "Generating a UFMC waveform" on page 71.

Manual operation: See "Number of Sub-bands" on page 36

[:SOURce<hw>]:BB:OFDM:UFMC:PREequal <UfmcPreEqual>

Applies a filter pre-equalization.

Parameters:

<UfmcPreEqual> 1 | ON | 0 | OFF

*RST: 0

Example: See Example "Generating a UFMC waveform" on page 71.

Manual operation: See "Subband Filter Pre-equalization" on page 36

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4.5 User commands

Remote-control commands

User commands

[:SOURce<hw>]:BB:OFDM:USER<ch0>:DATA................................................................... 70

[:SOURce<hw>]:BB:OFDM:USER<ch0>:LIST.....................................................................70

[:SOURce<hw>]:BB:OFDM:USER<ch0>:PATTern............................................................... 70

[:SOURce<hw>]:BB:OFDM:USER<ch0>:PWR....................................................................70

[:SOURce<hw>]:BB:OFDM:USER<ch0>:DATA <Datasource>

Sets the data source per user.

Parameters:

<Datasource> PN9 | PN11 | PN15 | PN16 | PN20 | PN21 | PN23 | PATTern |

DLISt | ZERO | ONE *RST: PN16

Example: See Example "Generating a UFMC waveform" on page 71.

Manual operation: See "Data Source" on page 38

[:SOURce<hw>]:BB:OFDM:USER<ch0>:LIST <DataList>

Selects an existing data list file from the default directory or from the specific directory.

Parameters:

<DataList> string

file name incl. file extension or complete file path

Example: See Example "Generating a UFMC waveform" on page 71.

Manual operation: See "Data Source" on page 38

[:SOURce<hw>]:BB:OFDM:USER<ch0>:PATTern <Pattern>, <BitCount>

Sets a bit pattern as a data source.

Parameters:

<Pattern> numeric

*RST: #H0

<BitCount> integer

Range: 1 to 64 *RST: 1

Example: See Example "Generating a UFMC waveform" on page 71.

Manual operation: See "Data Source" on page 38

[:SOURce<hw>]:BB:OFDM:USER<ch0>:PWR <Power>

Applies a power offset.

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Allocation commands

Parameters:

<Power> float

Range: -80 to 10 Increment: 1E-3 *RST: 0

Example: See Example "Generating a UFMC waveform" on page 71.

Manual operation: See "ρ / dB" on page 39

4.6

Allocation commands

Example: Generating a UFMC waveform

// ********************************************************************************

// Call the default settings.

// ********************************************************************************

*RST

// Presets the instrument.

// Alternatively, preset the OFDM baseband settings only.

SOURce1:BB:OFDM:PRESet

// Alternatively, preset only modulation parameters for the set modulation mode.

// For example, preset universal filtered multi-carrier modulation settings.

SOURce1:BB:OFDM:MODulation UFMC

SOURce1:BB:OFDM:MODPreset

// ********************************************************************************

// Configure physical settings of the modulation mode.

// ********************************************************************************

SOURce1:BB:OFDM:NSUBcarriers 512

SOURce1:BB:OFDM:NOCCupied 408

SOURce1:BB:OFDM:SCSPace 0.05

SOURce1:BB:OFDM:SEQLength 8

SOURce1:BB:OFDM:CPLength 10

SOURce1:BB:OFDM:RGUard?

// Response: "52"

SOURce1:BB:OFDM:LGUard?

// Response: "52"

SOURce1:BB:OFDM:BWOCcupied?

// Response: "20.4"

SOURce1:BB:OFDM:DFTS:STATe?

// Response: "0"

// DFT-s-OFDM for data allocations is deactivated.

SOURce1:BB:OFDM:SAMPling?

// Response: "25.6"

SOURce1:BB:OFDM:SRATe:VARiation?

// Response: "15360000"

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Allocation commands

// ********************************************************************************

// Configure filter settings of the modulation mode.

// ********************************************************************************

SOURce1:BB:OFDM:FILTer:TYPE DCH

SOURce1:BB:OFDM:FILTer:LENGth 74

SOURce1:BB:OFDM:FILTer:SBATtenuation 60

SOURce1:BB:OFDM:UFMC:NSUBand 34

SOURce1:BB:OFDM:SUBCarriers?

// Response: "12"

SOURce1:BB:OFDM:UFMC:PREequal?

// Response: "0"

// ********************************************************************************

// Configure user settings. Available users are always active.

// ********************************************************************************

SOURce1:BB:OFDM:USER0:DATA PN23

SOURce1:BB:OFDM:USER0:PWR 1

// Load the file 5g_datalist.dm_iqd from the default directory.

SOURce1:BB:OFDM:USER2:DATA DLIS

SOURce1:BB:OFDM:USER2:LIST "/var/user/5g_datalist.dm_iqd"

SOURce1:BB:OFDM:USER4:DATA PATT

SOURce1:BB:OFDM:USER4:PATTern #H1C4A9,17

// ********************************************************************************

// Confgure allocation settings

// ********************************************************************************

SOURce1:BB:OFDM:NALLoc 6

SOURce1:BB:OFDM:ALLoc0:CONTent?

// Response: "PRE"

SOURce1:BB:OFDM:ALLoc0:SYNO 2

SOURce1:BB:OFDM:ALLoc1:CONTent?

// Response: "DATA"

SOURce1:BB:OFDM:ALLoc1:MODulation QAM256

SOURce1:BB:OFDM:ALLoc1:SCNO 100

SOURce1:BB:OFDM:ALLoc1:SCOFfset 2

SOURce1:BB:OFDM:ALLoc1:SYOFfset 2

SOURce1:BB:OFDM:ALLoc1:DATA USER0

SOURce1:BB:OFDM:ALLoc1:PHYSbits?

// Response: "4000"

SOURce1:BB:OFDM:ALLoc1:STATe 1

SOURce1:BB:OFDM:ALLoc2:SCNO 200

SOURce1:BB:OFDM:ALLoc2:SYNO 2

SOURce1:BB:OFDM:ALLoc2:SCOFfset 150

SOURce1:BB:OFDM:ALLoc2:SYOFfset 2

SOURce1:BB:OFDM:ALLoc2:DATA USER3

SOURce1:BB:OFDM:ALLoc3:MODulation SCMA

SOURce1:BB:OFDM:ALLoc3:SCNO 200

SOURce1:BB:OFDM:ALLoc3:SYNO 2

SOURce1:BB:OFDM:ALLoc3:SCOFfset 208

SOURce1:BB:OFDM:ALLoc3:SYOFfset 4

SOURce1:BB:OFDM:ALLoc3:PWR 3

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Allocation commands

SOURce1:BB:OFDM:ALLoc4:CONFlict?

// Response: "1"

SOURce1:BB:OFDM:ALLoc4:SCNO 90

SOURce1:BB:OFDM:ALLoc4:SYNO 3

SOURce1:BB:OFDM:ALLoc4:SCOFfset 110

SOURce1:BB:OFDM:ALLoc4:SYOFfset 4

SOURce1:BB:OFDM:ALLoc4:DATA USER5

SOURce1:BB:OFDM:ALLoc5:MODulation SCMA

SOURce1:BB:OFDM:ALLoc5:SCNO 252

SOURce1:BB:OFDM:ALLoc5:SCOFfset 90

SOURce1:BB:OFDM:ALLoc5:SYOFfset 7

SOURce1:BB:OFDM:ALLoc3:SCMA:CODebook?

// Response: "4"

SOURce1:BB:OFDM:ALLoc3:SCMA:NLAYers?

// Response: "6"

SOURce1:BB:OFDM:ALLoc3:SCMA:SPRead?

// Response: "4"

SOURce1:BB:OFDM:ALLoc3:SCMA:LAYer1:USER USER1

SOURce1:BB:OFDM:ALLoc3:SCMA:LAYer1:STATe 0

SOURce1:BB:OFDM:ALLoc3:SCMA:LAYer1:PWR?

// Response: "0"

SOURce1:BB:OFDM:ALLoc3:SCMA:LAYer2:STATe 0

SOURce1:BB:OFDM:ALLoc3:SCMA:LAYer4:STATe 0

SOURce1:BB:OFDM:ALLoc5:SCMA:LAYer0:STATe 0

SOURce1:BB:OFDM:ALLoc5:SCMA:LAYer3:STATe 0

SOURce1:BB:OFDM:ALLoc5:SCMA:LAYer5:STATe 0

// Response: "0"

SOURce1:BB:OFDM:ALLoc5:CONFlict?

// Response: "0"

SOURce1:BB:OFDM:STATe 1

SOURce1:BB:OFDM:WAVeform:CREate "/var/user/5g_ufmc.wv"

[:SOURce<hw>]:BB:OFDM:NALLoc...................................................................................74

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:MODulation.......................................................... 74

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCNO..................................................................74

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SYNO..................................................................74

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCOFfset.............................................................75

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SYOFfset............................................................. 75

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:PHYSbits?............................................................75

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:DATA................................................................... 75

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:LIST.................................................................... 76

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:PATTern............................................................... 76

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:CIQFile................................................................ 76

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:PWR....................................................................76

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:CONTent.............................................................. 77

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:STATe.................................................................. 77

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:CONFlict?............................................................ 77

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Allocation commands

[:SOURce<hw>]:BB:OFDM:NALLoc <NoOfAlloc>

Sets the number of scheduled allocations.

Parameters:

<NoOfAlloc> integer

Range: 0 to 500 *RST: 1

Example: See Example "Generating a UFMC waveform" on page 71.

Manual operation: See "Number of Allocations" on page 40

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:MODulation <BaseModType>

Sets the modulation type of an allocation.

Parameters:

<BaseModType> BPSK | QPSK | QAM16 | QAM64 | QAM256 | SCMA | CIQ

CIQ

Custom IQ data file, loaded with the command [:

SOURce<hw>]:BB:OFDM:ALLoc<ch0>:CIQFile.

*RST: QPSK

Example: See Example "Generating a UFMC waveform" on page 71.

Manual operation: See "Modulation" on page 41

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCNO <NoOfSubcarriers>

Sets the number of allocated subcarriers.

Parameters:

<NoOfSubcarriers> integer

Range: 1 to 13107 *RST: 1

Example: See Example "Generating a UFMC waveform" on page 71.

Manual operation: See "No. SC" on page 41

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SYNO <NoOfSymbols>

Sets the allocation size as number of symbols.

Parameters:

<NoOfSymbols> integer

Range: 0 to 1000 *RST: 1

Example: See Example "Generating a UFMC waveform" on page 71.

Manual operation: See "No. Sym." on page 41

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Allocation commands

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCOFfset <ScOffset>

Sets the start subcarrier of the selected allocation.

Parameters:

<ScOffset> integer

Range: 0 to 13106 *RST: 0

Example: See Example "Generating a UFMC waveform" on page 71.

Manual operation: See "Offset SC" on page 41

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SYOFfset <SymOffset>

Sets the start symbol of the selected allocation.

Parameters:

<SymOffset> integer

Range: 0 to 999 *RST: 0

Example: See Example "Generating a UFMC waveform" on page 71.

Manual operation: See "Offset Sym." on page 41

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:PHYSbits?

Queries the allocation size in bits.

Return values:

<PhysicalBits> integer

Example: See Example "Generating a UFMC waveform" on page 71.

Usage: Query only

Manual operation: See "Phys Bits" on page 41

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:DATA <Datasource>

Selects the data source for the selected allocation.

Parameters:

<Datasource> USER1 | USER2 | USER3 | USER4 | PN9 | PN11 | PN15 |

PN16 | PN20 | PN21 | PN23 | PATTern | DLISt | ZERO | ONE | USER5 | USER0

*RST: PN16

Example: See Example "Generating a UFMC waveform" on page 71.

Manual operation: See "Data Source" on page 41

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Allocation commands

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:LIST <DataList>

Selects an existing data list file from the default directory or from the specific directory.

Parameters:

<DataList> string

file name incl. file extension or complete file path

Example: See Example "Generating a UFMC waveform" on page 71.

Manual operation: See "Data Source" on page 41

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:PATTern

Sets a bit pattern as data source.

Parameters:

<Pattern> numeric

*RST: #H0

<BitCount> integer

Range: 1 to 64 *RST: 1

Example: See Example "Generating a UFMC waveform" on page 71.

Manual operation: See "Data Source" on page 41

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:CIQFile <CustomIqFile>

Selects an existing file with custom I/Q data from the default directory or from the specific directory.

Parameters:

<CustomIqFile> string

Filename including file extension or complete file path

Example:

SOURce1:BB:OFDM:NALLoc 1

SOURce1:BB:OFDM:ALLoc0:MODulation CIQ

SOURce1:BB:OFDM:ALLoc0:CIQFile "/var/user/iq.iqw"

Manual operation: See "Data Source" on page 41

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:PWR <Power>

Applies a power offset to the allocation relative to the others.

Parameters:

<Power> float

Range: -80 to 10 Increment: 1E-3 *RST: 0

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Allocation commands

Example: See Example "Generating a UFMC waveform" on page 71.

Manual operation: See "ρ / dB" on page 42

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:CONTent <ContentType>

Sets the content type.

Parameters:

<ContentType> DATA | PREamble | PILot | REServed

DATA

Default value for FBMC and GFDM modulations.

PREamble

Default value for the first allocation of the UFMC modulation.

DATA|PILot|REServed

Selects the content type for f-OFDM/OFDM modulations. *RST: DATA

Example: See Example "Generating a UFMC waveform" on page 71.

Manual operation: See "Content Type" on page 42

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:STATe <State>

Enables the allocation.

Parameters:

<State> 1 | ON | 0 | OFF

*RST: 0

Example: See Example "Generating a UFMC waveform" on page 71.

Manual operation: See "State" on page 43

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:CONFlict?

Returns 1, if allocations overlap.

Return values:

<Conflict> 1 | ON | 0 | OFF

Example: See Example "Generating a UFMC waveform" on page 71.

Usage: Query only

Manual operation: See "Conflict" on page 44

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4.7 SCMA commands

Remote-control commands

SCMA commands

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:NLAYers?...................................................78

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:SPRead?................................................... 78

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:CODebook?............................................... 78

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:LAYer<st0>:PWR?......................................79

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:LAYer<st0>:STATe...................................... 79

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:LAYer<st0>:USER...................................... 79

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:NLAYers?

Queries the number of layers.

Return values:

<NoOfLayers> integer

Range: 0 to 6 *RST: 6

Example: See Example "Generating a UFMC waveform" on page 71.

Usage: Query only

Manual operation: See "Number of Layers J" on page 45

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:SPRead?

Queries the spreading factor.

Return values:

<SpreadFac> integer

Range: 0 to 4 *RST: 4

Example: See Example "Generating a UFMC waveform" on page 71.

Usage: Query only

Manual operation: See "Spreading Factor K" on page 45

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:CODebook?

Queries the codebook size.

Return values:

<Codebook> integer

Range: 0 to 4 *RST: 4

Example: See Example "Generating a UFMC waveform" on page 71.

Usage: Query only

Manual operation: See "Codebook Size M" on page 45

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Remote-control commands

SCMA commands

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:LAYer<st0>:PWR?

Applies a power offset to the selected layer relative to the others.

Return values:

<Power> float

Range: -80 to 10 Increment: 1E-3 *RST: 0

Example: See Example "Generating a UFMC waveform" on page 71.

Usage: Query only

Manual operation: See "ρ / dB" on page 46

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:LAYer<st0>:STATe

Enables the layer (codebook).

Parameters:

<State> 1 | ON | 0 | OFF

*RST: 0

Example: See Example "Generating a UFMC waveform" on page 71.

Manual operation: See "State" on page 46

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:LAYer<st0>:USER

Maps the users to the layers.

Parameters:

*RST: USER0

Example: See Example "Generating a UFMC waveform" on page 71.

Manual operation: See "User" on page 46

<State>

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4.8 Trigger commands

Remote-control commands

Trigger commands

Example: Configuring triggers

SOURce1:BB:OFDM:TRIGger:SEQuence SINGle

SOURce1:BB:OFDM:TRIGger:SLENgth 200

// ********************************************************************************

// Outputs the first 200 samples of the current waveform after the trigger event.

SOURce1:BB:OFDM:TRIGger:SEQuence ARETrigger

SOURce1:BB:OFDM:TRIGger:SOURce EGT1

// Uses the external trigger signal from the USER connector.

SOURce1:BB:OFDM:TRIGger:EXTernal:SYNChronize:OUTPut ON

SOURce1:BB:OFDM:TRIGger:EXTernal:DELay 200

SOURce1:BB:OFDM:TRIGger:EXTernal:INHibit 100

SOURce1:BB:OFDM:TRIGger:SOURce INTB

// Uses the internal trigger signal from the other path.

SOURce1:BB:OFDM:TRIGger:OBASeband:DELay 25

SOURce1:BB:OFDM:TRIGger:OBASeband:INHibit 10

SOURce1:BB:OFDM:TRIGger:SEQuence AAUTo

SOURce1:BB:OFDM:TRIGger:SOURce INTernal

SOURce1:BB:OFDM:STATe 1

SOURce1:BB:OFDM:TRIGger:EXEC

Example: Specifying delay and inhibit values in time units

SOURce1:BB:OFDM:CLOCk 1000000

SOURce1:BB:OFDM:TRIGger:SEQuence AAUT

SOURce1:BB:OFDM:TRIGger:SOURce EGT1

SOURce1:BB:OFDM:TRIGger:DELay:UNIT SAMP

SOURce1:BB:OFDM:TRIGger:EXTernal:DELay 100

SOURce1:BB:OFDM:TRIGger:EXTernal:RDELay?

// Response in seconds: "100"

SOURce1:BB:OFDM:TRIGger:DELay:UNIT TIME

SOURce1:BB:OFDM:TRIGger:EXTernal:TDELay 0.00001

SOURce1:BB:OFDM:TRIGger:EXTernal:RDELay?

// Response in seconds: "0.00001"

// Corresponds to 10 µs.

SOURce1:BB:OFDM:TRIGger:DELay:UNIT SAMP

SOURce1:BB:OFDM:TRIGger:EXTernal:DELay 10

[:SOURce<hw>]:BB:OFDM[:TRIGger]:SEQuence................................................................81

[:SOURce<hw>]:BB:OFDM:TRIGger:SOURce.................................................................... 81

[:SOURce<hw>]:BB:OFDM:TRIGger:RMODe?................................................................... 82

[:SOURce<hw>]:BB:OFDM:TRIGger:SLENgth....................................................................82

[:SOURce<hw>]:BB:OFDM:TRIGger:SLUNit.......................................................................82

[:SOURce<hw>]:BB:OFDM:TRIGger:EXECute....................................................................82

[:SOURce<hw>]:BB:OFDM:TRIGger:ARM:EXECute............................................................83

[:SOURce<hw>]:BB:OFDM:TRIGger:EXTernal:SYNChronize:OUTPut...................................83

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Remote-control commands

Trigger commands

[:SOURce<hw>]:BB:OFDM:TRIGger:DELay:UNIT...............................................................83

[:SOURce<hw>]:BB:OFDM:TRIGger:OBASeband:DELay.................................................... 83

[:SOURce<hw>]:BB:OFDM:TRIGger:OBASeband:RDELay?................................................ 84

[:SOURce<hw>]:BB:OFDM:TRIGger:OBASeband:TDELay.................................................. 84

[:SOURce<hw>]:BB:OFDM:TRIGger:OBASeband:INHibit.................................................... 84

[:SOURce<hw>]:BB:OFDM:TRIGger[:EXTernal]:DELay....................................................... 84

[:SOURce<hw>]:BB:OFDM:TRIGger:EXTernal:TDELay....................................................... 85

[:SOURce<hw>]:BB:OFDM:TRIGger:EXTernal:RDELay?.....................................................85

[:SOURce<hw>]:BB:OFDM:TRIGger[:EXTernal]:INHibit....................................................... 85

[:SOURce<hw>]:BB:OFDM[:TRIGger]:SEQuence <TrigMode>

Sets the trigger mode.

Parameters:

<TrigMode> AUTO | RETRigger | AAUTo | ARETrigger | SINGle

*RST: AUTO

Example: See Example "Configuring triggers" on page 80.

Manual operation: See "Trigger Mode" on page 49

[:SOURce<hw>]:BB:OFDM:TRIGger:SOURce <TrigSource>

Selects the trigger signal source and determines the way the triggering is executed. Provided are:

●

Internal triggering by a command (INTernal)

●

External trigger signal via one of the local or global connectors – EGT1|EGT2: External global trigger – EGC1|EGC2: External global clock – ELTRigger: External local trigger – ELCLock: External local clock

●

Internal triggering by a signal from the other basebands (INTA|INTB)

●

In primary-secondary instrument mode, the external baseband synchronization signal (BBSY)

●

OBASeband|BEXTernal|EXTernal: Setting only Provided only for backward compatibility with other Rohde & Schwarz signal generators. The R&S SMW accepts these values and maps them automatically as follows: EXTernal = EGT1, BEXTernal = EGT2, OBASeband = INTA or INTB (depending on the current baseband)

Parameters:

<TrigSource> INTB|INTernal|OBASeband|EGT1|EGT2|EGC1|EGC2|ELTRig-

Example: See Example "Configuring triggers" on page 80.

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Remote-control commands

Trigger commands

Options: ELTRigger|ELCLock require R&S SMW-B10.

BBSY requires R&S SMW-B9.

Manual operation: See "Trigger Source" on page 50

[:SOURce<hw>]:BB:OFDM:TRIGger:RMODe?

Queries the status of waveform output.

Return values:

<TrigRunMode> STOP | RUN

*RST: STOP

Example: See Example "Configuring triggers" on page 80.

Usage: Query only

Manual operation: See "Running/Stopped" on page 50

[:SOURce<hw>]:BB:OFDM:TRIGger:SLENgth <TrigSeqLen>

Defines the length of the signal sequence to be output in the SINGle trigger mode.

Parameters:

<TrigSeqLen> integer

Range: 1 to dynamic *RST: 1

Example: See Example "Configuring triggers" on page 80.

Manual operation: See "Trigger Signal Duration" on page 50

[:SOURce<hw>]:BB:OFDM:TRIGger:SLUNit <TrigSeqLenUnit>

Defines the unit for the entry of the length of the signal sequence to be output in the SINGle trigger mode.

Parameters:

<TrigSeqLenUnit> SEQuence | SAMPle

*RST: SEQuence

Example: See Example "Configuring triggers" on page 80.

Manual operation: See "Signal Duration Unit" on page 49

[:SOURce<hw>]:BB:OFDM:TRIGger:EXECute

Executes an internal trigger event.

Example:

Usage: Event

Manual operation: See "Execute Trigger" on page 50

See Example "Configuring triggers" on page 80.

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Remote-control commands

Trigger commands

[:SOURce<hw>]:BB:OFDM:TRIGger:ARM:EXECute

Stops (arms) waveform output.

Example: See Example "Configuring triggers" on page 80.

Usage: Event

Manual operation: See "Arm" on page 50

[:SOURce<hw>]:BB:OFDM:TRIGger:EXTernal:SYNChronize:OUTPut

Enables signal output synchronous to the trigger event.

Parameters:

<TrigSyncOutpSta> 1 | ON | 0 | OFF

*RST: 1

Example: See Example "Configuring triggers" on page 80.

Manual operation: See "Sync. Output to External Trigger/Sync. Output to Trigger"

on page 51

[:SOURce<hw>]:BB:OFDM:TRIGger:DELay:UNIT <TrigDelUnit>

Determines the unit that the trigger delay is expressed in.

Parameters:

<TrigDelUnit> SAMPle | TIME

*RST: SAMPle

Example: See Example "Specifying delay and inhibit values in time units"

on page 80.

Manual operation: See "(External) Delay Unit" on page 52

[:SOURce<hw>]:BB:OFDM:TRIGger:OBASeband:DELay <TrigIntOthDelay>

Specifies the trigger delay for triggering by the signal from the second path.

Parameters:

<TrigIntOthDelay> float

Range: 0 to 2147483647 Increment: 0.01 *RST: 0

Example: See Example "Configuring triggers" on page 80.

Manual operation: See "(Specified) External Delay/(Specified) Trigger Delay"

on page 52

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Remote-control commands

Trigger commands

[:SOURce<hw>]:BB:OFDM:TRIGger:OBASeband:RDELay?

Queries the time a trigger event form the other path is delayed.

Return values:

<IntOthRDelaySec> float

Range: 0 to 688 Increment: 250E-12 *RST: 0

Example: See Example "Specifying delay and inhibit values in time units"

on page 80.

Usage: Query only

Manual operation: See "Actual Trigger Delay/Actual External Delay" on page 52

[:SOURce<hw>]:BB:OFDM:TRIGger:OBASeband:TDELay <IntOthDelaySec>

Specifies the trigger delay for triggering by the signal from the other path.

Parameters:

<IntOthDelaySec> float

Range: 0 to 688 Increment: 250E-12 *RST: 0 Default unit: s

Example: See Example "Specifying delay and inhibit values in time units"

on page 80.

Manual operation: See "(Specified) External Delay/(Specified) Trigger Delay"

on page 52

[:SOURce<hw>]:BB:OFDM:TRIGger:OBASeband:INHibit <IntOthInhibit>

For triggering via the other path, specifies the number of samples by which a restart is inhibited.

Parameters:

<IntOthInhibit> integer

Range: 0 to 67108863 *RST: 0 Default unit: Sample

Example: See Example "Configuring triggers" on page 80.

Manual operation: See "External / Trigger Inhibit" on page 52

[:SOURce<hw>]:BB:OFDM:TRIGger[:EXTernal]:DELay <TrigExtDelay>

Specifies the trigger delay.

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Remote-control commands

Trigger commands

Parameters:

<TrigExtDelay> float

Range: 0 to 2147483647 Increment: 0.01 *RST: 0

Example: See Example "Configuring triggers" on page 80.

Manual operation: See "(Specified) External Delay/(Specified) Trigger Delay"

on page 52

[:SOURce<hw>]:BB:OFDM:TRIGger:EXTernal:TDELay

Specifies the trigger delay for external triggering. The value affects all external trigger signals.

Parameters:

<TrigExtTimeDel> float

Range: 0 to 688 Increment: 250E-12 *RST: 0 Default unit: s

Example: See Example "Specifying delay and inhibit values in time units"

on page 80.

Manual operation: See "(Specified) External Delay/(Specified) Trigger Delay"

on page 52

[:SOURce<hw>]:BB:OFDM:TRIGger:EXTernal:RDELay?

Queries the time (in seconds) an external trigger event is delayed for.

Return values:

<ResExtDelaySec> float

Range: 0 to 688 Increment: 250E-12 *RST: 0

Example: See Example "Specifying delay and inhibit values in time units"

on page 80.

Usage: Query only

Manual operation: See "Actual Trigger Delay/Actual External Delay" on page 52

[:SOURce<hw>]:BB:OFDM:TRIGger[:EXTernal]:INHibit <TrigExtInhibit>

Specifies the number of samples by which a restart is to be inhibited following an external trigger event.

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4.9 Marker commands

Remote-control commands

Marker commands

Parameters:

<TrigExtInhibit> integer

Range: 0 to dynamic *RST: 0

Example: See Example "Configuring triggers" on page 80.

Manual operation: See "External / Trigger Inhibit" on page 52

Example: Enabling a marker 2 signal

SOURce1:BB:OFDM:TRIGger:OUTPut2:MODE?

// Response: "RESTart"

SOURce1:BB:OFDM:TRIGger:OUTPut2:FOFFset 10

SOURce1:BB:OFDM:TRIGger:OUTPut2:ROFFset 20

SOURce1:BB:OFDM:TRIGger:OUTPut2:DELay?

// Response in samples: "10"

[:SOURce<hw>]:BB:OFDM:TRIGger:OUTPut<ch>:MODE................................................... 86

[:SOURce<hw>]:BB:OFDM:TRIGger:OUTPut<ch>:ROFFset................................................86

[:SOURce<hw>]:BB:OFDM:TRIGger:OUTPut<ch>:FOFFset................................................ 86

[:SOURce<hw>]:BB:OFDM:TRIGger:OUTPut<ch>:DELay................................................... 87

[:SOURce<hw>]:BB:OFDM:TRIGger:OUTPut<ch>:MODE <MarkMode>

Defines the signal for the selected marker output.

Parameters:

<MarkMode> RESTart

*RST: RESTart

Example: See Example "Enabling a marker 2 signal" on page 86.

Manual operation: See "Marker Mode" on page 54

[:SOURce<hw>]:BB:OFDM:TRIGger:OUTPut<ch>:ROFFset <MarkRiseOffs> [:SOURce<hw>]:BB:OFDM:TRIGger:OUTPut<ch>:FOFFset <MarkFallOffs>

Shifts the rising or falling ramp of the marker by the selected number of samples.

Parameters:

<MarkFallOffs> integer

Range: -640000 to 640000 *RST: 0

Example: See Example "Enabling a marker 2 signal" on page 86.

Manual operation: See "Rise/Fall Offset" on page 54

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4.10 Clock commands

Remote-control commands

Clock commands

[:SOURce<hw>]:BB:OFDM:TRIGger:OUTPut<ch>:DELay <MarkDelay>

Defines the delay between the signal on the marker outputs and the start of the signals.

Parameters:

<MarkDelay> float

Range: 0 to 16777215 Increment: 0.001 *RST: 0 Default unit: Samples

Example: See Example "Enabling a marker 2 signal" on page 86.

Manual operation: See "Marker x Delay" on page 54

Example: Configuring clock settings

SOURce1:BB:OFDM:CLOCk:SOURce ELCL

SOURce1:BB:OFDM:CLOCk:MODE SAMP

CLOCk:INPUt:FREQuency?

[:SOURce<hw>]:BB:OFDM:CLOCk:SOURce......................................................................87

[:SOURce<hw>]:BB:OFDM:CLOCk:MODE......................................................................... 87

[:SOURce<hw>]:BB:OFDM:CLOCk:SOURce <ClockSour>

Selects the clock source:

●

INTernal: Internal clock reference

●

ELCLock: External local clock

●

EXTernal = ELCLock: Setting only Provided for backward compatibility with other Rohde & Schwarz signal generators

Parameters:

<ClockSour> INTernal|ELCLock|EXTernal

*RST: INTernal

Example: See Example "Configuring clock settings" on page 87.

Options: ELCLock requires R&S SMW-B10.

Manual operation: See "Clock Source" on page 55

[:SOURce<hw>]:BB:OFDM:CLOCk:MODE <ClockMode>

Sets the type of externally supplied clock.

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Remote-control commands

Clock commands

Parameters:

<ClockMode> SAMPle

*RST: SAMPle

Example: See Example "Configuring clock settings" on page 87.

Options: R&S SMW-B10

Manual operation: See "Clock Mode" on page 55

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A XML settings file

XML settings file

Annex

You can use the created *.xml file for OFDM signal analysis. See "Export path for

XML settings" on page 26. Use the file for measurements with Rohde & Schwarz signal

analyzer, for example R&S®VSE-K96.

Example: Default "Exported_K114_settings_K96.xml" file

The example shows the structure of the default file

Exported_K114_settings_K96.xml.

<?xml version="1.0" encoding="utf-8"?>

<Name>OFDM_16MHzBW_312kHzSpacing</Name>

<Description>Automatically exported R&S SMW-K114 settings to K96 system

configuration file.</Description>

</GeneralParameters>

</Preamble>

<IQ>

</IQ>

</IQSymbols>

</Constellation>

<Name>DontCare</Name>

<HumanReadableName>DontCare</HumanReadableName>

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XML settings file

<AllocationType>DontCare</AllocationType>

</Constellation>

<Name>PilotConstellation</Name>

<HumanReadableName>PilotConstellation</HumanReadableName>

<AllocationType>PilotConstellation</AllocationType>

<IQ>

</IQ>

<IQ>

</IQ>

<IQ>

</IQ>

<IQ>

</IQ>

</IQSymbols>

</Constellation>

<AllocationType>DataConstellation</AllocationType>

<IQ>

</IQ>

<IQ>

</IQ>

</IQSymbols>

</Constellation>

<Name>PilotConstellation</Name>

<HumanReadableName>PilotConstellation</HumanReadableName>

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XML settings file

<AllocationType>PilotConstellation</AllocationType>

<IQ>

</IQ>

<IQ>

</IQ>

</IQSymbols>

</Constellation>

</Constellations>

<Matrix>AQEBAQECAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIC

AgICAgICAgEBAQEBAQEBAQEBAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIC

AgICAgICAgICAgIBAQEBAQEBAQEBAQMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMD

AwMDAwMDAwMDAwMDAwMDAQEBAQEBAQEBAQEDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMD

AwMDAwMDAwMDAwMDAwMDAwMDAwEBAQEBAQEBAQEBAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMD

AwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMBAQEBAQEBAQEBAQMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMD

AwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAQEBAQEBAQEBAQEDAwMDAwMDAwMDAwMDAwMDAwMDAwMD

AwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwEBAQEBAQEBAQEBAwMDAwMDAwMDAwMDAwMDAwMD

AwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMBAQEBAQEBAQEBAQQEBAQEBAQEBAQEBAQE

BAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEAQEBAQEBAQEBAQEEBAQEBAQEBAQE

BAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAEBAQEBAQ==</Matrix>

</Allocation>

<PilotSymbolIdxArray>AQADAAMAAwADAAMAAwADAAEAAwADAAMAAwACAAIAAQABAAMAAwABAAM

AAQABAAMAAAACAAAAAQAAAAIAAgABAAEAAwABAAIAAAABAAEAAgAAAAIAAAADAAMAAAABAAAAAAADAAE

AAQACAAAAAwAAAAAAAAAAAAEAAgACAAAAAwADAAAAAAABAAIAAwABAAEAAAAAAAAAAwACAAEAAQACAAI

AAQADAAAAAQABAAEAAAABAAMAAgACAAMAAQABAAIAAwACAAAAAgAAAAEAAgABAAMAAAAAAAEAAQABAAE

AAQABAAEAAQABAAEAAQABAAEAAQABAAAAAQABAAEAAQABAAEAAQABAAEAAQAAAAEAAAAAAAEAAAABAAE

AAQABAAEAAAABAAEAAQAAAAEAAAABAAEAAQAAAAAAAQAAAAAAAAAAAAEAAAAAAAEAAAABAAAAAAABAAA

AAQABAAEAAAABAAEAAAAAAAAAAAABAAAAAQABAAAAAAAAAAEAAAAAAAAAAQABAAEAAQAAAAAAAAABAAA

AAAAAAAAAAQABAAAAAQAAAAEAAQAAAA==</PilotSymbolIdxArray>

</PilotInformation>

</FSK96ConfigurationFile>

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Glossary: List of terms and abbreviations

ARB: Arbitrary Waveform Generator

CoMP: Coordinated multipoint

f-OFDM: Filtered OFDM

Synonyms: SF-OFDM, UF-OFDM, RB-F-OFDM

FBMC: Filter-Bank Multi-carrier

FFT: Fast Fourier Transformation

GFDM: Generalized Frequency Division Multiplexing

IFFT: Inverse Fast Fourier Transformation

NOMA: Non-Orthogonal Multiple Access

OFDM: Orthogonal Frequency-Division Multiplexing

OQAM: Offset QAM

QAM: Quadrature amplitude modulation

RB-F-OFDM: Resource block based filtered OFDM

see f-OFDM

Resource block (UFMC): Subband (UFMC)

SCMA: Sparse code multiple access

SF-OFDM: Spectrum Filtered-OFDM

see f-OFDM

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Glossary: List of terms and abbreviations

SMT FBMC: Staggered modulated multitone filter bank

Subband (UFMC): In the context of the UFMC modulation, the term subband

describes the smallest amount of resources that can be allocated to a user. Synonyms: Resource block, Subcarrier

Subcarrier (UFMC): Subband (UFMC)

UF-OFDM: Universal Filtered-OFDM

see f-OFDM

UFMC: Universal Filtered Multi-Carrier

Universal Filtered OFDM (UF-OFDM): UFMC

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Symbols

Glossary: Specifications, references and further information

[1]: Michailow, N.; Gaspar, I.; Krone, S.; Lentmaier, M.; Fettweis, G. "Generalized Frequency Division Multiplexing: Analysis of an Alternative Multi-Carrier Technique for Next Generation Cellular Systems", Aug. 2012

[2]: Schaich, F.; Wild, T.; Chen, Y. “Waveform contenders for 5G - suitability for short packet and low latency transmissions,” VTC Spring, May 2014.

[3]: Viholainen, A.; Bellanger, M.; Huchard, M. "PHYDYAS – PHYsical layer for DYnamic AccesS and cognitive radio", Report D5.1, Jan. 2009

5GNOW: Project 5th Generation Non-orthogonal Waveforms for Asynchronous Signal- ing

http://www.5gnow.eu

5GNOW D3.x: 5G Waveform Candidate Selection, Version D3.2 Final 5GNOW Transceiver and frame structure concept, Version D3.3

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List of commands

[:SOURce<hw>]:BB:OFDM:ACPLength.......................................................................................................... 63

[:SOURce<hw>]:BB:OFDM:ACPSymbols....................................................................................................... 63

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:CIQFile........................................................................................... 76

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:CONFlict?.......................................................................................77

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:CONTent.........................................................................................77

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:DATA.............................................................................................. 75

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:LIST................................................................................................76

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:MODulation.................................................................................... 74

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:PATTern..........................................................................................76

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:PHYSbits?......................................................................................75

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:PWR...............................................................................................76

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:CODebook?........................................................................ 78

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:LAYer<st0>:PWR?.............................................................. 79

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:LAYer<st0>:STATe.............................................................. 79

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:LAYer<st0>:USER...............................................................79

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:NLAYers?............................................................................ 78

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:SPRead?.............................................................................78

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCNO.............................................................................................74

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCOFfset........................................................................................75

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:STATe.............................................................................................77

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SYNO............................................................................................. 74

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SYOFfset........................................................................................75

[:SOURce<hw>]:BB:OFDM:BWOCcupied?.....................................................................................................64

[:SOURce<hw>]:BB:OFDM:CLOCk:MODE.....................................................................................................87

[:SOURce<hw>]:BB:OFDM:CLOCk:SOURce..................................................................................................87

[:SOURce<hw>]:BB:OFDM:CPLength.............................................................................................................63

[:SOURce<hw>]:BB:OFDM:CPSYmbols......................................................................................................... 63

[:SOURce<hw>]:BB:OFDM:DFTS:STATe........................................................................................................64

[:SOURce<hw>]:BB:OFDM:FILTer:CUTTrans................................................................................................. 67

[:SOURce<hw>]:BB:OFDM:FILTer:LENGth.....................................................................................................66

[:SOURce<hw>]:BB:OFDM:FILTer:ROLLoff.................................................................................................... 66

[:SOURce<hw>]:BB:OFDM:FILTer:SBATtenuation..........................................................................................66

[:SOURce<hw>]:BB:OFDM:FILTer:TYPE........................................................................................................ 66

[:SOURce<hw>]:BB:OFDM:FILTer:UCATalog?................................................................................................67

[:SOURce<hw>]:BB:OFDM:FILTer:ULENgth?................................................................................................. 68

[:SOURce<hw>]:BB:OFDM:FILTer:USELection...............................................................................................67

[:SOURce<hw>]:BB:OFDM:FILTer:WINDowing...............................................................................................67

[:SOURce<hw>]:BB:OFDM:FOFDm:NSUBand...............................................................................................69

[:SOURce<hw>]:BB:OFDM:GFDM:DBSYmbols..............................................................................................68

[:SOURce<hw>]:BB:OFDM:LGUard?..............................................................................................................64

[:SOURce<hw>]:BB:OFDM:MODPreset..........................................................................................................60

[:SOURce<hw>]:BB:OFDM:MODulation..........................................................................................................60

[:SOURce<hw>]:BB:OFDM:NALLoc................................................................................................................74

[:SOURce<hw>]:BB:OFDM:NOCCupied......................................................................................................... 62

[:SOURce<hw>]:BB:OFDM:NSUBcarriers.......................................................................................................62

[:SOURce<hw>]:BB:OFDM:OUTPath..............................................................................................................61

[:SOURce<hw>]:BB:OFDM:PRESet................................................................................................................59

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R&S®SMW-K114

List of commands

[:SOURce<hw>]:BB:OFDM:RGUard?............................................................................................................. 65

[:SOURce<hw>]:BB:OFDM:SAMPling?...........................................................................................................64

[:SOURce<hw>]:BB:OFDM:SCSPace.............................................................................................................62

[:SOURce<hw>]:BB:OFDM:SEQLength..........................................................................................................62

[:SOURce<hw>]:BB:OFDM:SETTing:CATalog................................................................................................ 59

[:SOURce<hw>]:BB:OFDM:SETTing:DEL.......................................................................................................60

[:SOURce<hw>]:BB:OFDM:SETTing:LOAD....................................................................................................59

[:SOURce<hw>]:BB:OFDM:SETTing:STORe..................................................................................................59

[:SOURce<hw>]:BB:OFDM:SRATe:VARiation.................................................................................................61

[:SOURce<hw>]:BB:OFDM:STATe.................................................................................................................. 59

[:SOURce<hw>]:BB:OFDM:SUBCarriers?...................................................................................................... 68

[:SOURce<hw>]:BB:OFDM:TRIGger:ARM:EXECute......................................................................................83

[:SOURce<hw>]:BB:OFDM:TRIGger:DELay:UNIT..........................................................................................83

[:SOURce<hw>]:BB:OFDM:TRIGger:EXECute...............................................................................................82

[:SOURce<hw>]:BB:OFDM:TRIGger:EXTernal:RDELay?...............................................................................85

[:SOURce<hw>]:BB:OFDM:TRIGger:EXTernal:SYNChronize:OUTPut.......................................................... 83

[:SOURce<hw>]:BB:OFDM:TRIGger:EXTernal:TDELay................................................................................. 85

[:SOURce<hw>]:BB:OFDM:TRIGger:OBASeband:DELay..............................................................................83

[:SOURce<hw>]:BB:OFDM:TRIGger:OBASeband:INHibit..............................................................................84

[:SOURce<hw>]:BB:OFDM:TRIGger:OBASeband:RDELay?......................................................................... 84

[:SOURce<hw>]:BB:OFDM:TRIGger:OBASeband:TDELay............................................................................84

[:SOURce<hw>]:BB:OFDM:TRIGger:OUTPut<ch>:DELay.............................................................................87

[:SOURce<hw>]:BB:OFDM:TRIGger:OUTPut<ch>:FOFFset..........................................................................86

[:SOURce<hw>]:BB:OFDM:TRIGger:OUTPut<ch>:MODE.............................................................................86

[:SOURce<hw>]:BB:OFDM:TRIGger:OUTPut<ch>:ROFFset......................................................................... 86

[:SOURce<hw>]:BB:OFDM:TRIGger:RMODe?...............................................................................................82

[:SOURce<hw>]:BB:OFDM:TRIGger:SLENgth............................................................................................... 82

[:SOURce<hw>]:BB:OFDM:TRIGger:SLUNit.................................................................................................. 82

[:SOURce<hw>]:BB:OFDM:TRIGger:SOURce................................................................................................81

[:SOURce<hw>]:BB:OFDM:TRIGger[:EXTernal]:DELay................................................................................. 84

[:SOURce<hw>]:BB:OFDM:TRIGger[:EXTernal]:INHibit................................................................................. 85

[:SOURce<hw>]:BB:OFDM:UFMC:NSUBand................................................................................................. 69

[:SOURce<hw>]:BB:OFDM:UFMC:PREequal.................................................................................................69

[:SOURce<hw>]:BB:OFDM:USER<ch0>:DATA.............................................................................................. 70

[:SOURce<hw>]:BB:OFDM:USER<ch0>:LIST................................................................................................70

[:SOURce<hw>]:BB:OFDM:USER<ch0>:PATTern..........................................................................................70

[:SOURce<hw>]:BB:OFDM:USER<ch0>:PWR............................................................................................... 70

[:SOURce<hw>]:BB:OFDM:WAVeform:CREate..............................................................................................60

[:SOURce<hw>]:BB:OFDM[:TRIGger]:SEQuence.......................................................................................... 81

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R&S®SMW-K114

Index

Symbols

*.dat file

Filter ............................................................................ 16

I/Q data ....................................................................... 21

*.iqw file ............................................................................. 21

Allocation

Boost ........................................................................... 42

Conflict ........................................................................ 44

Content type ............................................................... 42

Data source ................................................................ 41

Modulation .................................................................. 41

Number ....................................................................... 40

Physical bits ................................................................ 41

Power offset ................................................................ 42

State ........................................................................... 43

Subcarrier number ...................................................... 41

Subcarrier offset ..........................................................41

Symbol number ........................................................... 41

Symbol offset .............................................................. 41

Allocation number ............................................................. 40

Application cards ................................................................. 8

Application notes ................................................................. 8

Arm .................................................................................... 50

Armed_Auto ...................................................................... 49

Armed_Retrigger ............................................................... 49

Attenuation

Side-lobe attenuation .................................................. 34

Stopband .................................................................... 34

Auto ................................................................................... 49

Bandwidth

Occupied ..................................................................... 32

Brochures ............................................................................ 7

Catalog

User filter .................................................................... 35

Clock

Mode ........................................................................... 55

Source ........................................................................ 55

Codebook .......................................................................... 45

Codebook size M .............................................................. 45

Common trigger settings ................................................... 49

Conventions

SCPI commands ......................................................... 57

Coupled trigger settings .................................................... 49

Custom I/Q data

File format ................................................................... 21

Cyclic prefix, CP

As in LTE .....................................................................30

Calculation principle .................................................... 29

Dynamic ...................................................................... 30

Enable ......................................................................... 29

Enable CP pattern ................................................ 30, 31

Length ......................................................................... 29

Data block size .................................................................. 37

Data sheets ......................................................................... 7

Default settings

OFDM Signal Generation ........................................... 25

Delay

Marker ......................................................................... 54

Trigger .........................................................................52

Delete

User filter .................................................................... 35

DFT-S state ....................................................................... 31

Documentation overview ..................................................... 6

Dolph-Chebishev window

Length ......................................................................... 34

Shaping ....................................................................... 34

Side-lobe attenuation .................................................. 34

Export OFDM settings for R&S VSE-K96 ......................... 26

External trigger .................................................................. 52

External trigger delay ........................................................ 52

f-OFDM

Filter parameters ......................................................... 34

Factor K ............................................................................. 37

FBMC types

CMT, FMT, SMT .......................................................... 12

FFT size ............................................................................ 28

Filter

Cut transient response ................................................ 35

Dolph-Chebishev ........................................................ 33

f-OFDM ....................................................................... 34

GFDM ......................................................................... 33

Length ......................................................................... 34

Side-lobe attenuation .................................................. 34

UFMC ......................................................................... 33

Windowing method, f-OFDM ...................................... 34

Filter length

FBMC .......................................................................... 37

Filter Pre-equalization

Activate ....................................................................... 36

First symbol

Time plan .................................................................... 47

Generate

Waveform file .............................................................. 25

Getting started ..................................................................... 6

Help ..................................................................................... 6

I/Q files

*.dat file ....................................................................... 21

*.iqw file ...................................................................... 21

Installation ........................................................................... 5

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R&S®SMW-K114

Index

Instrument help ................................................................... 6

Instrument security procedures ........................................... 7

Layer

Power offset ................................................................ 46

State ........................................................................... 46

Layer mapping

Settings ....................................................................... 46

User ............................................................................ 46

Left guard

Number of subcarriers ................................................ 32

Load

User filter .................................................................... 35

Marker

Offset, fall .................................................................... 54

Offset, rise ...................................................................54

Marker Delay ..................................................................... 54

Measured external clock ................................................... 55

Modulation type ................................................................. 26

Number

Left guard subcarriers ................................................. 32

Right guard subcarriers .............................................. 32

Number of layers J ............................................................ 45

OFDM

Settings file automatically created .............................. 26

Open source acknowledgment (OSA) ................................. 8

OQAM

Principle ...................................................................... 12

Pilot

Signal analyzer ........................................................... 42

PN9

Preamble .................................................................... 42

Preamble symbols

Number ....................................................................... 42

Raised cosine filter

see Cosine filter .......................................................... 33

Release notes ..................................................................... 8

Resource blocks

Number ....................................................................... 36

Retrigger ........................................................................... 49

Right guard

Number of subcarriers ................................................ 32

Roll-off

see rolloff .................................................................... 34

Rolloff factor

GFDM ......................................................................... 34

Root raised cosine filter

see Root Cosine ......................................................... 33

RRC filter

see Root Cosine filter ................................................. 33

Safety instructions ............................................................... 7

Sampling rate .................................................................... 32

Save/Recall

OFDM Signal Generation ........................................... 25

Script

Generate user filter ..................................................... 16

Security procedures ............................................................ 7

Sequence length ............................................................... 29

Service manual ................................................................... 7

Set to default

5G candidates ............................................................. 25

Settings file

Analysis with R&S VSE-K96 ....................................... 26

Signal duration unit ........................................................... 49

Signal generation status .................................................... 50

Single ................................................................................ 49

Soft truncation

Length ......................................................................... 34

Windowing method ..................................................... 34

Soft truncation window

Shaping ....................................................................... 34

Spreading factor K ............................................................ 45

Standard settings

OFDM Signal Generation ........................................... 25

State

OFDM Signal Generation ........................................... 25

Sub-bands

Number ....................................................................... 36

Subband

Filter Pre-equalization ................................................. 36

Subcarriers

Bandwidth ................................................................... 29

Number of active ......................................................... 28

Number of available .................................................... 28

Occupied ..................................................................... 28

Spacing ....................................................................... 29

Subchannel

Number ....................................................................... 36

Superimposed symbols

Faktor K ...................................................................... 37

Symbols

Time plan .................................................................... 47

Synchronization

Signal analyzer ........................................................... 42

Time plan

Open new window ...................................................... 47

Trigger

Sync. output ................................................................ 51

Trigger delay ..................................................................... 52

Actual .......................................................................... 52

Expressed in time ....................................................... 52

Resulting ..................................................................... 52

Unit ............................................................................. 52

Trigger mode ..................................................................... 49

Trigger signal duration .......................................................50

Trigger source ................................................................... 50

Tutorials ...............................................................................7

UFMC

Filter parameters ......................................................... 34

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R&S®SMW-K114

User

Boost ........................................................................... 39

Data source ................................................................ 38

How many ................................................................... 38

Power offset ................................................................ 39

User filter

Create file ................................................................... 16

File format ................................................................... 16

Script ........................................................................... 16

User manual ........................................................................ 6

User to layer mapping ....................................................... 46

Waveform file

Create ......................................................................... 25

White papers ....................................................................... 8

Windowing method

Hamming .................................................................... 34

Hanning ...................................................................... 34

Index

99User Manual 1177.6246.02 ─ 15

Rohde&Schwarz SMW-K114 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

Welcome to the OFDM Signal Generation option

1.1 Accessing the OFDM Signal Generation dialog

1.2 What's new

1.3 Documentation overview

1.3.1 Getting started manual

1.3.2 User manuals and help

1.3.3 Tutorials

1.3.4 Service manual

1.3.5 Instrument security procedures

1.3.6 Printed safety instructions

1.3.7 Data sheets and brochures

1.3.8 Release notes and open source acknowledgment (OSA)

1.3.9 Application notes, application cards, white papers, etc.

1.4 Scope

1.5 Notes on screenshots

2 About OFDM Signal Generation option

2.1 Required options

2.2 Overview of modulation schemes

2.2.1 OFDM

2.2.2 f-OFDM

2.2.3 GFDM

2.2.4 UFMC

2.2.5 FBMC

2.2.6 Filtering

2.3 Supported multiple access schemes

2.4 Physical layer parameterization

Generating configuration files for R&S®VSE-K96

OFDM Signal Generation configuration and settings

3.1 General settings

3.2 General settings

3.2.1 Physical settings

3.2.2 Filter settings

3.2.3 Modulation configuration settings

3.3 Allocation settings

3.3.1 User settings

3.3.2 Allocations settings

3.3.3 SCMA settings

3.3.4 Time plan

3.4 Trigger settings

3.5 Marker settings

3.6 Clock settings

3.7 Local and global connectors settings

4 Remote-control commands

4.1 General commands

4.2 Physical settings commands

4.3 Filter commands

4.4 Modulation commands

4.5 User commands

Allocation commands

4.7 SCMA commands

4.8 Trigger commands

4.9 Marker commands

4.10 Clock commands

A XML settings file

Annex

Glossary: List of terms and abbreviations

Glossary: Specifications, references and further information

List of commands

Index