Rohde&Schwarz SMBVB-K114 User Manual

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

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1178823602 Version 08

This document describes the following software options:

●

R&S®SMBVB-K114 OFDM Signal Generation (1423.8050.xx)

This manual describes firmware version FW 5.00.044.xx and later of the R&S®SMBV100B.

© 2021 Rohde & Schwarz GmbH & Co. KG Mühldorfstr. 15, 81671 München, 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.

1178.8236.02 | Version 08 | R&S®SMBVB-K114

The following abbreviations are used throughout this manual: R&S®SMBV100B is abbreviated as R&S SMBVB, 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®SMBVB-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 Service manual............................................................................................................... 7

1.3.4 Instrument security procedures.......................................................................................7

1.3.5 Printed safety instructions............................................................................................... 7

1.3.6 Data sheets and brochures............................................................................................. 7

1.3.7 Release notes and open source acknowledgment (OSA).............................................. 7

Contents

1.3.8 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

3.2.2 Filter settings.................................................................................................................32

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

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

3.3.1 User settings................................................................................................................. 37

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 Global connectors settings........................................................................................55

4 Remote-control commands.................................................................56

4.1 General commands.....................................................................................................57

Contents

4.2 Physical settings commands.....................................................................................60

4.3 Filter commands......................................................................................................... 64

4.4 Modulation commands............................................................................................... 67

4.5 User commands.......................................................................................................... 68

4.6 Allocation commands.................................................................................................70

4.7 SCMA commands........................................................................................................76

4.8 Trigger commands......................................................................................................78

4.9 Marker commands...................................................................................................... 83

4.10 Clock commands........................................................................................................ 84

Annex.................................................................................................... 85

A XML settings file...................................................................................85

Glossary: List of terms and abbreviations........................................ 88

Glossary: Specifications, references and further information........ 90

List of commands................................................................................ 91

Index......................................................................................................93

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1 Welcome to the OFDM signal generation

option

The R&S SMBV100B-K114 is a firmware application that adds functionality to generate:

●

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.

Welcome to the OFDM signal generation option

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

5GNOW D3.x.

The R&S SMBV100B-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

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Support of multiple access schemes such as SCMA

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Optional use of a cyclic prefix or a preamble

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Internal signal generator solution, no need for external PC

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

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 SMBV100B user manual. The latest version is available at:

www.rohde-schwarz.com/manual/SMBV100B

Installation

You can find detailed installation instructions in the delivery of the option or in the R&S SMBV100B service manual.

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1.1 Accessing the OFDM signal generation dialog

To open the dialog with OFDM signal generation settings

► In the block diagram of the R&S SMBV100B, select "Baseband > OFDM signal

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

1.2 What's new

This manual describes firmware version FW 5.00.044.xx and later of the R&S®SMBV100B.

Welcome to the OFDM signal generation option

Documentation overview

generation".

A dialog box opens that displays the provided general settings.

Compared to the previous version there are editorial changes only.

1.3 Documentation overview

This section provides an overview of the R&S SMBV100B user documentation. Unless specified otherwise, you find the documents on the R&S SMBV100B product page at:

www.rohde-schwarz.com/manual/smbv100b

1.3.1 Getting started manual

Introduces the R&S SMBV100B 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 commands with programming examples, and information on maintenance, instrument interfaces and error messages. Includes the contents of the getting started manual.

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Software option manual Contains the description of the specific functions of an option. Basic information on operating the R&S SMBV100B is not included.

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The contents of the user manuals are available as help in the R&S SMBV100B. 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.

1.3.3 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

1.3.4 Instrument security procedures

Welcome to the OFDM signal generation option

Documentation overview

Deals with security issues when working with the R&S SMBV100B in secure areas. It is available for download on the Internet.

1.3.5 Printed safety instructions

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

1.3.6 Data sheets and brochures

The data sheet contains the technical specifications of the R&S SMBV100B. 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/smbv100b

1.3.7 Release notes and open source acknowledgment (OSA)

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/smbv100b

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

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

See www.rohde-schwarz.com/application/smbv100b

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:

●

Welcome to the OFDM signal generation option

Notes on screenshots

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 SMBV100B 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

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

●

2.1 Required options

The basic equipment layout for generating OFDM signals includes the:

●

About OFDM signal generation option

Overview of modulation schemes

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

Base unit Baseband real-time extension (R&S SMBVB-K520) Digital standard OFDM signal generation (R&S SMBVB-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:

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

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If supported, install the real-time option of the digital standard, e.g. R&S SMBVBK55 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

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

●

2.2.3 GFDM

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.

About OFDM signal generation option

Overview of modulation schemes

Chapter 3.2.1, "Physical settings", on page 27 Chapter 3.2.2, "Filter settings", on page 32 Chapter 3.2.3, "Modulation configuration settings", on page 35

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

Related settings

●

2.2.4 UFMC

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]).

About OFDM signal generation option

Overview of modulation schemes

Chapter 3.2.1, "Physical settings", on page 27 Chapter 3.2.2, "Filter settings", on page 32 Chapter 3.2.3, "Modulation configuration settings", on page 35

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 32

●

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

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2.2.5 FBMC

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]).

About OFDM signal generation option

Overview of modulation schemes

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

Related settings

●

2.2.6 Filtering

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

About OFDM signal generation option

Overview of modulation schemes

Chapter 3.2.1, "Physical settings", on page 27 Chapter 3.2.2, "Filter settings", on page 32 Chapter 3.2.3, "Modulation configuration settings", on page 35

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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●

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.

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

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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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.

About OFDM signal generation option

Overview of modulation schemes

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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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

About OFDM signal generation option

Overview of modulation schemes

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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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

About OFDM signal generation option

Supported multiple access schemes

●

Chapter 3.2.2, "Filter settings", on page 32

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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

 





 





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:

About OFDM signal generation option

Supported multiple access schemes

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 SMBVB-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

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:

●

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

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

●

About OFDM signal generation option

Physical layer parameterization

Chapter 3.3, "Allocation settings", on page 37

*.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 SMBV100B 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 SMBV100B, 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 SMBV100B, configure the signal as required.

VSE-K96

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

The *.xml settings file is created automatically.

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3. Connect to the user directory of the R&S SMBV100B via USB, LAN, ftp or any

4. Copy the Exported_K114_settings_K96.xml file

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.

other access methods. Open, for example, the \\<R&S SMBV100B IP Address>\share\K114\. See also, chapter "File and Data Management" in the R&S SMBV100B user manual.

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

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

● Global connectors settings......................................................................................55

OFDM signal generation configuration and settings

General settings

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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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 57

Set to Default

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

OFDM signal generation configuration and settings

General settings

Parameter Values

State Not affected by "Set to Default"

Modulation Type OFDM

Remote command:

[:SOURce<hw>]:BB:OFDM:PRESet on page 58

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 SMBV100B user manual. Remote command:

[:SOURce<hw>]:BB:OFDM:SETTing:CATalog on page 58 [:SOURce<hw>]:BB:OFDM:SETTing:LOAD on page 58 [:SOURce<hw>]:BB:OFDM:SETTing:STORe on page 58 [:SOURce<hw>]:BB:OFDM:SETTing:DEL on page 59

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 59

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Modulation Type

Selects the modulation type. "OFDM"

"f-OFDM"

"UFMC"

"GFDM"

"FBMC"

Remote command:

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

OFDM signal generation configuration and settings

General settings

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.

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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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 85. Remote command:

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

Set to Modulation Default

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

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

General Settings…

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

●

Remote command: n.a.

OFDM signal generation configuration and settings

General settings

Chapter 3.2.1, "Physical settings", on page 27 Chapter 3.2.2, "Filter settings", on page 32 Chapter 3.2.3, "Modulation configuration settings", on page 35

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...........................................................................................................32

● 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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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

Sampling Rate...............................................................................................................31

Occupied Bandwidth..................................................................................................... 31

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

OFDM signal generation configuration and settings

General settings

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. Remote command:

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

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.

Remote command:

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

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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.

Remote command:

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

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 61

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"

The cyclic prefix calculation depends on the modulation scheme:

●

OFDM signal generation configuration and settings

General settings

= 0.5*Total Number Of Subcarriers

max

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)

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.

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Remote command:

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

OFDM signal generation configuration and settings

General settings

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

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) 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

≠

Cyclic

Remote command:

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

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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

Access:

1. Select "OFDM signal generation > Modulation Type > for example UFMC".

2. Select "OFDM signal generation > General Settings".

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3. Select "Filter".

OFDM signal generation configuration and settings

General settings

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:

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 64

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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

OFDM signal generation configuration and settings

General settings

Remote command:

[:SOURce<hw>]:BB:OFDM:FILTer:ROLLoff on page 65

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 65

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 65

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. 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 66

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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 65

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 66

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

OFDM signal generation configuration and settings

General settings

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".

The provided settings depend on the selected modulation type.

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Settings:

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

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

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

Data Block Size.............................................................................................................36

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 67 [:SOURce<hw>]:BB:OFDM:FOFDm:NSUBand on page 67

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 67

OFDM signal generation configuration and settings

General settings

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.

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 68

Data Block Size

In GFDM, sets data block size M in terms of symbols per data block.

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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 67

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:

OFDM signal generation configuration and settings

Allocation settings

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-frequencygrid. 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.

Settings:

● User settings........................................................................................................... 37

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

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

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

3.3.1 User 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

Settings:

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

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

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

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

State..............................................................................................................................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.

●

"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.

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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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3. Select "Allocations".

OFDM signal generation configuration and settings

Allocation settings

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 72

Alloc. #

Displays the consecutive number of the allocation. Remote command:

n.a.

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Modulation

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

Additionally, 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 72

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 73

OFDM signal generation configuration and settings

Allocation settings

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 73

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 73

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 73

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 74

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

Access:

1. Select "OFDM signal generation > Modulation Type > for example UFMC".

2. Select "OFDM signal generation > Allocation Settings > Allocations".

OFDM signal generation configuration and settings

Allocation settings

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 76

Codebook Size M ← Codebook

Displays the codebook size M. Remote command:

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

Number of Layers J ← Codebook

Displays the resulting number of layers J.

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

 





 





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

Where:

●

With the predefined settings, the number of layers is J = 6. Remote command:

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:NLAYers? on page 76

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.

OFDM signal generation configuration and settings

Allocation settings

K is the spreading factor

N is the number of non-zero elements, see Figure 2-8.

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 78

ρ / dB ← Layer Mapping

Provided for future use. Remote command:

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:LAYer<st0>:PWR? on page 77

State ← Layer Mapping

Enables the individual layers (codebooks). Remote command:

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:LAYer<st0>:STATe on page 77

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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3. Select "Time Plan".

OFDM signal generation configuration and settings

Allocation settings

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

Access:

► Select "OFDM signal generation > Trigger In".

OFDM signal generation configuration and settings

Trigger settings

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 SMBV100B 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 connectors.

The provided trigger signals are not dedicated to a particular connector. Trigger signals can be mapped to one or two User x connectors.

Use the 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

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(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 SMBV100B 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.

OFDM signal generation configuration and settings

Trigger settings

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

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

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

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

└ Sync. Output to External Trigger/Sync. Output to Trigger...............................50

└ External / Trigger Inhibit..................................................................................51

Trigger Mode ← Trigger Settings Common to All Basebands

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

●

"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 gener-

ated continuously.

An "Arm" stops the signal generation. A subsequent trigger event (internal or exter-

nal) causes a restart.

●

"Armed Retrigger"

The signal is generated only when a trigger event occurs. Then the signal is gener-

ated 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 gener-

ated 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 79

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.

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Remote command:

[:SOURce<hw>]:BB:OFDM:TRIGger:SLUNit on page 80

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 80

Running/Stopped ← Trigger Settings Common to All Basebands

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

●

Remote command:

[:SOURce<hw>]:BB:OFDM:TRIGger:RMODe? on page 80

OFDM signal generation configuration and settings

Trigger settings

"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.

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 81

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 81

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".

●

"External Global Trigger"

The trigger event is the active edge of an external trigger signal provided and con-

figured at the User x connectors.

●

"Baseband Sync In"

In primary-secondary instrument mode, secondary instruments are triggered by the

active edge of the synchronization signal. Remote command:

[:SOURce<hw>]:BB:OFDM:TRIGger:SOURce on page 79

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

Enables signal output synchronous to the trigger event.

●

"On"

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●

OFDM signal generation configuration and settings

Trigger settings

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 out-

put. 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 sequen-

ces 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.

Remote command:

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

on page 81

External / Trigger Inhibit ← Trigger Settings Common to All Basebands

Applies for external trigger signal. 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 SMBV100B user manual. Remote command:

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

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(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 81

(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:

●

Use this setting to:

●

● For more information, see chapter "Basics on ..." in the R&S SMBV100B user manual.

OFDM signal generation configuration and settings

Trigger settings

The external trigger source

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

ces

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

The parameter displays the delay converted in time. Remote command:

[:SOURce<hw>]:BB:OFDM:TRIGger[:EXTernal]:DELay on page 81 [:SOURce<hw>]:BB:OFDM:TRIGger:EXTernal:TDELay on page 82

Actual Trigger Delay/Actual External Delay

Indicates the resulting trigger delay in "Time" unit. Remote command:

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

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3.5 Marker settings

Access:

► Select "OFDM signal generation > Marker".

OFDM signal generation configuration and settings

Marker settings

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 SMBV100B 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 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 Global connectors settings.

Settings:

Marker Mode.................................................................................................................53

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.

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"Restart (ARB)"

Remote command:

[:SOURce<hw>]:BB:OFDM:TRIGger:OUTPut<ch>:MODE on page 83

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 83 [:SOURce<hw>]:BB:OFDM:TRIGger:OUTPut<ch>:ROFFset on page 83

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 84

OFDM signal generation configuration and settings

Clock settings

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

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.

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 SMBV100B user manual.

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Defining the clock

The provided clock signals are not dedicated to a particular connector. They can be mapped to one or more User x connectors.

Use the 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:

●

Settings:

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

Clock Source

Selects the clock source.

●

Remote command:

[:SOURce<hw>]:BB:OFDM:CLOCk:SOURce on page 84

OFDM signal generation configuration and settings

Global connectors settings

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

Define the connector where the selected signal is provided.

Use the Global connectors settings.

"Internal"

The instrument uses its internal clock reference.

3.7 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 "Global connectors settings" in the user manual.

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4 Remote-control commands

The following commands are required to perform signal generation with the option R&S SMBV100B-K114 in a remote environment. We assume that the R&S SMBV100B has already been set up for remote operation in a network as described in the R&S SMBV100B 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 SMBV100B user manual.

Common Suffixes

The following common suffixes are used in the remote commands:

Remote-control commands

Suffix Value range Description

ENTity<ch>

SOURce<hw>

OUTPut<ch>

USER<ch>

ALLoc<ch0>

1 Optional keyword, provided for compatibility with

R&S®SMW200A ENTity1:SOURce1 = SOURce1

1 Available baseband signals

1 to 3 Available markers

0 to 5 Available users

0 to 30 Number of allocations

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 (p)reset is recommended to set the instrument to a definite state. The commands *RST and 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 SMBV100B-K114 option are described here:

● General commands.................................................................................................57

● Physical settings commands...................................................................................60

● Filter commands......................................................................................................64

● Modulation commands............................................................................................67

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● User commands......................................................................................................68

● Allocation commands..............................................................................................70

● SCMA commands................................................................................................... 76

● Trigger commands.................................................................................................. 78

● Marker commands.................................................................................................. 83

● Clock commands.....................................................................................................84

4.1 General commands

Example: Storing current configuration

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

*RST

SOURce1:BB:OFDM:SETTing:CATalog?

// 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"

Remote-control commands

General commands

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 ON

// Query the created *.xml file.

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

[:SOURce<hw>]:BB:OFDM:STATe..................................................................................... 57

[:SOURce<hw>]:BB:OFDM:PRESet...................................................................................58

[:SOURce<hw>]:BB:OFDM:SETTing:CATalog.....................................................................58

[:SOURce<hw>]:BB:OFDM:SETTing:LOAD........................................................................58

[:SOURce<hw>]:BB:OFDM:SETTing:STORe......................................................................58

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

[:SOURce<hw>]:BB:OFDM:WAVeform:CREate...................................................................59

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

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

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

[:SOURce<hw>]:BB:OFDM:SRATe:VARiation..................................................................... 60

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

Activates the standard.

Parameters:

<State> 0 | 1 | OFF | ON

*RST: 0

Example: See Example "Generating a UFMC waveform" on page 70.

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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: See Example "Generating a UFMC waveform" on page 70.

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.

Remote-control commands

General commands

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 "Storing current configuration" on page 57.

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.

Parameters:

<Filename> string

See Example "Storing current configuration" on page 57.

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

file name or complete file path

Example: See Example "Storing current configuration" on page 57.

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

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[: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

Example: See Example "Storing current configuration" on page 57.

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

Remote-control commands

General commands

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

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

Example: See Example "Generating a UFMC waveform" on page 70.

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 70.

Manual operation: See "Modulation Type" on page 26

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

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

OFDM:MODulation on page 59.

Example:

Usage: Event

See Example "Generating a UFMC waveform" on page 70.

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.

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

See also Example "Default "Exported_K114_settings_K96.xml" file" on page 85.

Parameters:

<K114OutputPath> string

Example: See Example "Saving a configuration to an *.xml file"

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

Remote-control commands

Physical settings commands

on page 57.

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

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 70.

4.2 Physical settings commands

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

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

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

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

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

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

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

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

[:SOURce<hw>]:BB:OFDM:SAMPling?.............................................................................. 62

[:SOURce<hw>]:BB:OFDM:BWOCcupied?.........................................................................63

[:SOURce<hw>]:BB:OFDM:LGUard?................................................................................. 63

[:SOURce<hw>]:BB:OFDM:RGUard?.................................................................................63

[: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 70.

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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

Example: See Example "Generating a UFMC waveform" on page 70.

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

Remote-control commands

Physical settings commands

Range: 1 to 13107 *RST: 53

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

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 70.

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 70.

Manual operation: See "Sequence Length" on page 29

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

Sets the cyclic prefix length as number of samples.

Parameters:

<CpLength> integer

Range: 0 to 8192 *RST: 16

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Example: See Example "Generating a UFMC waveform" on page 70.

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

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

Remote-control commands

Physical settings commands

on page 62.

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 62.

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

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

Queries the sampling rate.

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Return values:

<SampRate> float

Example: See Example "Generating a UFMC waveform" on page 70.

Usage: Query only

Manual operation: See "Sampling Rate" on page 31

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

Queries the occupied bandwidth.

Return values:

<OccBw> float

Remote-control commands

Physical settings commands

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

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

Example: See Example "Generating a UFMC waveform" on page 70.

Usage: Query only

Manual operation: See "Occupied Bandwidth" on page 31

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

Queries the number of left guard subcarriers.

Return values:

<LeftGuardSC> integer

Range: 0 to 1000 *RST: 52

Example: See Example "Generating a UFMC waveform" on page 70.

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

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Example: See Example "Generating a UFMC waveform" on page 70.

Usage: Query only

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

4.3 Filter commands

Example: 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"

Remote-control commands

Filter commands

[:SOURce<hw>]:BB:OFDM:FILTer:TYPE............................................................................ 64

[:SOURce<hw>]:BB:OFDM:FILTer:ROLLoff........................................................................ 65

[:SOURce<hw>]:BB:OFDM:FILTer:LENGth.........................................................................65

[:SOURce<hw>]:BB:OFDM:FILTer:SBATtenuation...............................................................65

[:SOURce<hw>]:BB:OFDM:FILTer:CUTTrans......................................................................65

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

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

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

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

[: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 70.

Manual operation: See "Filter Type" on page 33

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

Sets the filter parameter.

Parameters:

<RollOff> float

Example: See Example "Filter settings" on page 64.

Manual operation: See "Rolloff Factor" on page 34

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

Sets the filter length.

Parameters:

<FilterLength> integer

Remote-control commands

Filter commands

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

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

Example: See Example "Generating a UFMC waveform" on page 70.

Manual operation: See "Filter Length" on page 34

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

Sets the attenuation in the filter stop band.

Parameters:

<StBAttenuation> float

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

Example: See Example "Generating a UFMC waveform" on page 70.

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> 0 | 1 | OFF | ON

*RST: 0

Example: See Example "Filter settings" on page 64.

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

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

Sets the windowing method.

Parameters:

<Windowing> NONE | HANNing | HAMMing

Example: See Example "Filter settings" on page 64.

Manual operation: See "Windowing Method" on page 34

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

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

Remote-control commands

Filter commands

*RST: HANNing

Example:

Usage: Query only

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

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

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

Parameters:

<UserSel> string

Example: See Example "Filter settings" on page 64.

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

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

Queries the filter length.

Return values:

<UserFilterLen> integer

See Example "Generating a UFMC waveform" on page 70.

complete file path incl file name and file extenssion

Range: 1 to 800 *RST: 0

Example: See Example "Filter settings" on page 64.

Usage: Query only

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

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4.4 Modulation commands

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

[:SOURce<hw>]:BB:OFDM:GFDM:DBSYmbols.................................................................. 67

[:SOURce<hw>]:BB:OFDM:FOFDm:NSUBand................................................................... 67

[:SOURce<hw>]:BB:OFDM:UFMC:NSUBand......................................................................67

[:SOURce<hw>]:BB:OFDM:UFMC:PREequal..................................................................... 68

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

Queries the number of subcarriers per subband.

Return values:

<SubcPerSubband> integer

Example: See Example "Generating a UFMC waveform" on page 70.

Usage: Query only

Remote-control commands

Modulation commands

Range: 1 to 16384 *RST: 1

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.

Parameters:

<GFDMDbSymbols> integer

Range: 1 to 50 *RST: 8

Example:

SOURce1:BB:OFDM:GFDM:DBSYmbols 8

Manual operation: See "Data Block Size" on page 36

[:SOURce<hw>]:BB:OFDM:FOFDm:NSUBand <FofdmNSubands>

Sets the number of f-OFDM sub-bands.

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 sub-bands.

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Parameters:

<NSubbands> integer

Example: See Example "Generating a UFMC waveform" on page 70.

Manual operation: See "Number of Sub-bands" on page 36

[:SOURce<hw>]:BB:OFDM:UFMC:PREequal <UfmcPreEqual>

Applies a filter pre-equalization.

Parameters:

<UfmcPreEqual> 0 | 1 | OFF | ON

Example: See Example "Generating a UFMC waveform" on page 70.

Manual operation: See "Subband Filter Pre-equalization" on page 36

Remote-control commands

User commands

Range: 1 to 1500 *RST: 6

*RST: 0

4.5 User commands

[:SOURce<hw>]:BB:OFDM:USER<ch0>:DATA...................................................................68

[:SOURce<hw>]:BB:OFDM:USER<ch0>:LIST.....................................................................68

[:SOURce<hw>]:BB:OFDM:USER<ch0>:PATTern............................................................... 69

[:SOURce<hw>]:BB:OFDM:USER<ch0>:PWR....................................................................69

[:SOURce<hw>]:BB:OFDM:USER<ch0>:STATe.................................................................. 69

[: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 70.

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 70.

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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

<BitCount> integer

Example: See Example "Generating a UFMC waveform" on page 70.

Manual operation: See "Data Source" on page 38

Remote-control commands

User commands

*RST: #H0

Range: 1 to 64 *RST: 1

[:SOURce<hw>]:BB:OFDM:USER<ch0>:PWR

Applies a power offset.

Parameters:

<Power> float

Range: -80 to 10 Increment: 1E-3 *RST: 0

Example: See Example "Generating a UFMC waveform" on page 70.

Manual operation: See "ρ / dB" on page 39

[:SOURce<hw>]:BB:OFDM:USER<ch0>:STATe <State>

Activates the user.

Parameters:

<State> 0 | 1 | OFF | ON

*RST: 1

Example: See Example "Generating a UFMC waveform" on page 70.

Manual operation: See "State" on page 39

<Power>

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4.6 Allocation commands

Example: Generating a UFMC waveform

*RST

SOURce1:BB:OFDM:PRESet

SOURce1:BB:OFDM:MODulation UFMC

// SOURce1:BB:OFDM:MODPreset

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?

// 52

SOURce1:BB:OFDM:LGUard?

// 52

SOURce1:BB:OFDM:BWOCcupied?

// 20.4

SOURce1:BB:OFDM:SAMPling?

// 25.6

SOURce1:BB:OFDM:SRATe:VARiation?

// 15360000

Remote-control commands

Allocation commands

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?

// 12

SOURce1:BB:OFDM:UFMC:PREequal?

// 0

// User settings

SOURce1:BB:OFDM:USER0:DATA PN23

SOURce1:BB:OFDM:USER0:PWR 1

SOURce1:BB:OFDM:USER0:STATe 0

SOURce1:BB:OFDM:USER0:STATe 1

// file 5g_datalist.dm_iqd must exsist in 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

SOURce1:BB:OFDM:USER4:STATe 0

// Allocation settings

SOURce1:BB:OFDM:NALLoc 6

SOURce1:BB:OFDM:ALLoc0:CONTent?

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// PRE

SOURce1:BB:OFDM:ALLoc0:SYNO 2

SOURce1:BB:OFDM:ALLoc1:CONTent?

// 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?

// 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

SOURce1:BB:OFDM:ALLoc4:CONFlict?

// 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?

// 4

SOURce1:BB:OFDM:ALLoc3:SCMA:NLAYers?

// 6

SOURce1:BB:OFDM:ALLoc3:SCMA:SPRead?

// 4

SOURce1:BB:OFDM:ALLoc3:SCMA:LAYer1:USER USER1

SOURce1:BB:OFDM:ALLoc3:SCMA:LAYer1:STATe 0

SOURce1:BB:OFDM:ALLoc3:SCMA:LAYer1:PWR?

// 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

SOURce1:BB:OFDM:ALLoc4:CONFlict?

Remote-control commands

Allocation commands

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// 0

SOURce1:BB:OFDM:ALLoc5:CONFlict?

// 0

SOURce1:BB:OFDM:STATe

SOURce1:BB:OFDM:WAVeform:CREate "/var/user/5g_ufmc.wv"

[:SOURce<hw>]:BB:OFDM:NALLoc...................................................................................72

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:MODulation.......................................................... 72

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCNO..................................................................73

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SYNO..................................................................73

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCOFfset.............................................................73

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SYOFfset............................................................. 73

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:PHYSbits?............................................................74

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:DATA...................................................................74

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:LIST.................................................................... 74

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:PATTern............................................................... 74

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:CIQFile................................................................ 75

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:PWR....................................................................75

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:CONTent..............................................................75

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:STATe.................................................................. 75

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:CONFlict?............................................................ 76

Remote-control commands

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 70.

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 70.

Manual operation: See "Modulation" on page 41

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[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCNO <NoOfSubcarriers>

Sets the number of allocated subcarriers.

Parameters:

<NoOfSubcarriers> integer

Example: See Example "Generating a UFMC waveform" on page 70.

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

Remote-control commands

Allocation commands

Range: 1 to 13107 *RST: 1

Range: 0 to 1000 *RST: 1

Example: See Example "Generating a UFMC waveform" on page 70.

Manual operation: See "No. Sym." on page 41

[: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 70.

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 70.

Manual operation: See "Offset Sym." on page 41

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[: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 70.

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 |

Remote-control commands

Allocation commands

PN16 | PN20 | PN21 | PN23 | PATTern | DLISt | ZERO | ONE | USER5 | USER0

*RST: PN16

Example: See Example "Generating a UFMC waveform" on page 70.

Manual operation: See "Data Source" on page 41

[: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 70.

Manual operation: See "Data Source" on page 41

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:PATTern <Pattern>, <BitCount>

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 70.

Manual operation: See "Data Source" on page 41

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[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:CIQFile <CustomIqFile>

Selects an existing file wit hcustom I/Q data from the default directory or from the specific directory.

Parameters:

<CustomIqFile> string

Remote-control commands

Allocation commands

Filename incl. 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

Example: See Example "Generating a UFMC waveform" on page 70.

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 70.

Manual operation: See "Content Type" on page 42

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:STATe <State>

Enables the allocation.

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Parameters:

<State> 0 | 1 | OFF | ON

Example: See Example "Generating a UFMC waveform" on page 70.

Manual operation: See "State" on page 43

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

Returns 1, if allocations overlap.

Return values:

<Conflict> 0 | 1 | OFF | ON

Example: See Example "Generating a UFMC waveform" on page 70.

Usage: Query only

Manual operation: See "Conflict" on page 44

Remote-control commands

SCMA commands

*RST: 0

4.7 SCMA commands

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:NLAYers?...................................................76

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:SPRead?................................................... 76

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:CODebook?............................................... 77

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:LAYer<st0>:PWR?...................................... 77

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:LAYer<st0>:STATe...................................... 77

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:LAYer<st0>:USER...................................... 78

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

Queires the number of layers.

Return values:

<NoOfLayers> integer

Range: 0 to 6 *RST: 6

Example: See Example "Generating a UFMC waveform" on page 70.

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.

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Return values:

<SpreadFac> integer

Example: See Example "Generating a UFMC waveform" on page 70.

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

Remote-control commands

SCMA commands

Range: 0 to 4 *RST: 4

Example: See Example "Generating a UFMC waveform" on page 70.

Usage: Query only

Manual operation: See "Codebook Size M" on page 45

[: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 70.

Usage: Query only

Manual operation: See "ρ / dB" on page 46

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:LAYer<st0>:STATe <State>

Enables the layer (codebook).

Parameters:

<State> 0 | 1 | OFF | ON

*RST: 0

Example: See Example "Generating a UFMC waveform" on page 70.

Manual operation: See "State" on page 46

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

Maps the users to the layers.

Parameters:

Example: See Example "Generating a UFMC waveform" on page 70.

Manual operation: See "User" on page 46

Remote-control commands

Trigger commands

*RST: USER0

4.8

Trigger commands

Example: Configure and enable triggering

SOURce:BB:OFDM:TRIGger:SEQuence SINGle

SOURce:BB:OFDM:TRIGger:SLENgth 200

// the first 200 samples of the current waveform will be output after

// the next trigger event

// SOURce:BB:OFDM:TRIGger:SEQuence ARETrigger

// SOURce:BB:OFDM:TRIGger:SOURce EGT1

// external trigger signal must be provided at the USER connector

// SOURce:BB:OFDM:TRIGger:EXTernal:SYNChronize:OUTPut ON

// SOURce:BB:OFDM:TRIGger:EXTernal:DELay 200

// SOURce:BB:OFDM:TRIGger:EXTernal:INHibit 100

// SOURce:BB:OFDM:TRIGger:SOURce INTB

// the internal trigger signal from the other path must be used

// SOURce:BB:OFDM:TRIGger:OBASeband:DELay 25

// SOURce:BB:OFDM:TRIGger:OBASeband:INHibit 10

SOURce:BB:OFDM:TRIGger:SEQuence AAUTo

SOURce:BB:OFDM:TRIGger:SOURce INTernal

SOURce:BB:OFDM:STAT ON

SOURce:BB:OFDM:TRIGger:EXEC

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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: 100

SOURce1:BB:OFDM:TRIGger:DELay:UNIT TIME

SOURce1:BB:OFDM:TRIGger:EXTernal:TDELay 0.00001

SOURce1:BB:OFDM:TRIGger:EXTernal:RDELay?

// Response: 0.00001

SOURce1:BB:OFDM:TRIGger:DELay:UNIT SAMP

SOURce1:BB:OFDM:TRIGger:EXTernal:DELay 10

[:SOURce<hw>]:BB:OFDM[:TRIGger]:SEQuence................................................................79

[:SOURce<hw>]:BB:OFDM:TRIGger:SOURce.................................................................... 79

[:SOURce<hw>]:BB:OFDM:TRIGger:RMODe?................................................................... 80

[:SOURce<hw>]:BB:OFDM:TRIGger:SLENgth....................................................................80

[:SOURce<hw>]:BB:OFDM:TRIGger:SLUNit.......................................................................80

[:SOURce<hw>]:BB:OFDM:TRIGger:EXECute....................................................................81

[:SOURce<hw>]:BB:OFDM:TRIGger:ARM:EXECute............................................................81

[:SOURce<hw>]:BB:OFDM:TRIGger:EXTernal:SYNChronize:OUTPut...................................81

[:SOURce<hw>]:BB:OFDM:TRIGger:DELay:UNIT...............................................................81

[:SOURce<hw>]:BB:OFDM:TRIGger[:EXTernal]:DELay....................................................... 81

[:SOURce<hw>]:BB:OFDM:TRIGger:EXTernal:TDELay....................................................... 82

[:SOURce<hw>]:BB:OFDM:TRIGger:EXTernal:RDELay?.....................................................82

[:SOURce<hw>]:BB:OFDM:TRIGger[:EXTernal]:INHibit....................................................... 82

Remote-control commands

Trigger commands

[:SOURce<hw>]:BB:OFDM[:TRIGger]:SEQuence <TrigMode>

Sets the trigger mode.

Parameters:

<TrigMode> AUTO | RETRigger | AAUTo | ARETrigger | SINGle

*RST: AUTO

Example: See Example "Configure and enable triggering" on page 78.

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 User x connectors

EGT1: External global trigger

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●

Parameters:

<TrigSource> INTernal|EGT1|EXTernal|BBSY

Example: See Example "Configure and enable triggering" on page 78.

Manual operation: See "Trigger Source" on page 50

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

Queries the status of waveform output.

Remote-control commands

Trigger commands

In primary-secondary instrument mode, the external baseband synchronization sig-

nal (BBSY)

EXTernal: Setting only

Provided only for backward compatibility with other Rohde & Schwarz signal gener-

ators.

The R&S SMBV100B accepts this value and maps it automatically as follows:

EXTernal = EGT1

*RST: INTernal

Return values:

<TrigRunMode> STOP | RUN

*RST: STOP

Example: See Example "Configure and enable triggering" on page 78.

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 "Configure and enable triggering" on page 78.

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 "Configure and enable triggering" on page 78.

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Manual operation: See "Signal Duration Unit" on page 49

[:SOURce<hw>]:BB:OFDM:TRIGger:EXECute

Executes an internal trigger event.

Example: See Example "Configure and enable triggering" on page 78.

Usage: Event

Manual operation: See "Execute Trigger" on page 50

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

Stops (arms) waveform output.

Remote-control commands

Trigger commands

Example:

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> 0 | 1 | OFF | ON

Example: See Example "Configure and enable triggering" on page 78.

Manual operation: See "Sync. Output to External Trigger/Sync. Output to Trigger"

[:SOURce<hw>]:BB:OFDM:TRIGger:DELay:UNIT <TrigDelUnit>

Determines the units the trigger delay is expressed in.

Parameters:

<TrigDelUnit> SAMPle | TIME

See Example "Configure and enable triggering" on page 78.

*RST: 1

on page 50

*RST: SAMPle

Example: See Example "Specifying delay and inhibit values in time units"

on page 79.

Manual operation: See "(External) Delay Unit" on page 52

[:SOURce<hw>]:BB:OFDM:TRIGger[:EXTernal]:DELay <TrigExtDelay>

Specifies the trigger delay.

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Parameters:

<TrigExtDelay> float

Example: See Example "Configure and enable triggering" on page 78.

Manual operation: See "(Specified) External Delay/(Specified) Trigger Delay"

Remote-control commands

Trigger commands

Range: 0 to 2147483647 Increment: 0.01 *RST: 0

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 79.

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 79.

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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Parameters:

<TrigExtInhibit> integer

Example: See Example "Configure and enable triggering" on page 78.

Manual operation: See "External / Trigger Inhibit" on page 51

4.9 Marker commands

Example: Configure and enable standard marker signals

SOURce:BB:OFDM:TRIGger:OUTPut2:MODE?

// RESTart

SOURce:BB:OFDM:TRIGger:OUTPut2:FOFFset 10

SOURce:BB:OFDM:TRIGger:OUTPut2:ROFFset 20

Remote-control commands

Marker commands

Range: 0 to dynamic *RST: 0

[:SOURce<hw>]:BB:OFDM:TRIGger:OUTPut<ch>:MODE................................................... 83

[:SOURce<hw>]:BB:OFDM:TRIGger:OUTPut<ch>:ROFFset................................................83

[:SOURce<hw>]:BB:OFDM:TRIGger:OUTPut<ch>:FOFFset................................................ 83

[:SOURce<hw>]:BB:OFDM:TRIGger:OUTPut<ch>:DELay................................................... 84

[: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 "Configure and enable standard marker signals"

on page 83.

Manual operation: See "Marker Mode" on page 53

[: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 "Configure and enable standard marker signals"

on page 83.

Manual operation: See "Rise/Fall Offset" on page 54

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[: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

Example: See Example "Configure and enable standard marker signals"

Manual operation: See "Marker x Delay" on page 54

Remote-control commands

Clock commands

Range: 0 to 16777215 Increment: 1 *RST: 0 Default unit: Samples

on page 83.

4.10

Clock commands

Example: Clock settings

SOURce:BB:OFDM:CLOCk:SOURce INT

[:SOURce<hw>]:BB:OFDM:CLOCk:SOURce......................................................................84

[:SOURce<hw>]:BB:OFDM:CLOCk:SOURce <ClockSour>

Selects the clock source:

●

INTernal: Internal clock reference

Parameters:

<ClockSour> INTernal

*RST: INTernal

Example: See Example "Clock settings" on page 84.

Manual operation: See "Clock Source" on page 55

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Annex

A XML settings file

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 SMBV100B-K114 settings to K96 system

configuration file.</Description>

</GeneralParameters>

</Preamble>

<IQ>

</IQ>

</IQSymbols>

</Constellation>

<Name>DontCare</Name>

<HumanReadableName>DontCare</HumanReadableName>

XML settings file

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<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>

XML settings file

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<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>

XML settings file

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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

Glossary: List of terms and abbreviations

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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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

Glossary: List of terms and abbreviations

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Glossary: Specifications, references and further information

Symbols

[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

Glossary: Specifications, references and further information

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.......................................................................................................... 62

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

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:CIQFile........................................................................................... 75

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:CONFlict?.......................................................................................76

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:CONTent.........................................................................................75

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:DATA.............................................................................................. 74

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:LIST................................................................................................74

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:MODulation.................................................................................... 72

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:PATTern..........................................................................................74

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:PHYSbits?......................................................................................74

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:PWR...............................................................................................75

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:CODebook?........................................................................ 77

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:LAYer<st0>:PWR?..............................................................77

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:LAYer<st0>:STATe.............................................................. 77

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:LAYer<st0>:USER...............................................................78

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:NLAYers?............................................................................76

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCMA:SPRead?.............................................................................76

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCNO.............................................................................................73

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SCOFfset........................................................................................73

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:STATe.............................................................................................75

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SYNO............................................................................................. 73

[:SOURce<hw>]:BB:OFDM:ALLoc<ch0>:SYOFfset........................................................................................73

[:SOURce<hw>]:BB:OFDM:BWOCcupied?.....................................................................................................63

[:SOURce<hw>]:BB:OFDM:CLOCk:SOURce..................................................................................................84

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

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

[:SOURce<hw>]:BB:OFDM:FILTer:CUTTrans................................................................................................. 65

[:SOURce<hw>]:BB:OFDM:FILTer:LENGth.....................................................................................................65

[:SOURce<hw>]:BB:OFDM:FILTer:ROLLoff.................................................................................................... 65

[:SOURce<hw>]:BB:OFDM:FILTer:SBATtenuation..........................................................................................65

[:SOURce<hw>]:BB:OFDM:FILTer:TYPE........................................................................................................ 64

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

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

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

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

[:SOURce<hw>]:BB:OFDM:FOFDm:NSUBand...............................................................................................67

[:SOURce<hw>]:BB:OFDM:GFDM:DBSYmbols..............................................................................................67

[:SOURce<hw>]:BB:OFDM:LGUard?..............................................................................................................63

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

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

[:SOURce<hw>]:BB:OFDM:NALLoc................................................................................................................72

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

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

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

[:SOURce<hw>]:BB:OFDM:PRESet................................................................................................................58

[:SOURce<hw>]:BB:OFDM:RGUard?............................................................................................................. 63

[:SOURce<hw>]:BB:OFDM:SAMPling?...........................................................................................................62

List of commands

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

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

[:SOURce<hw>]:BB:OFDM:SETTing:CATalog................................................................................................ 58

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

[:SOURce<hw>]:BB:OFDM:SETTing:LOAD....................................................................................................58

[:SOURce<hw>]:BB:OFDM:SETTing:STORe..................................................................................................58

[:SOURce<hw>]:BB:OFDM:SRATe:VARiation.................................................................................................60

[:SOURce<hw>]:BB:OFDM:STATe..................................................................................................................57

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

[:SOURce<hw>]:BB:OFDM:TRIGger:ARM:EXECute......................................................................................81

[:SOURce<hw>]:BB:OFDM:TRIGger:DELay:UNIT..........................................................................................81

[:SOURce<hw>]:BB:OFDM:TRIGger:EXECute...............................................................................................81

[:SOURce<hw>]:BB:OFDM:TRIGger:EXTernal:RDELay?...............................................................................82

[:SOURce<hw>]:BB:OFDM:TRIGger:EXTernal:SYNChronize:OUTPut.......................................................... 81

[:SOURce<hw>]:BB:OFDM:TRIGger:EXTernal:TDELay................................................................................. 82

[:SOURce<hw>]:BB:OFDM:TRIGger:OUTPut<ch>:DELay.............................................................................84

[:SOURce<hw>]:BB:OFDM:TRIGger:OUTPut<ch>:FOFFset..........................................................................83

[:SOURce<hw>]:BB:OFDM:TRIGger:OUTPut<ch>:MODE.............................................................................83

[:SOURce<hw>]:BB:OFDM:TRIGger:OUTPut<ch>:ROFFset......................................................................... 83

[:SOURce<hw>]:BB:OFDM:TRIGger:RMODe?...............................................................................................80

[:SOURce<hw>]:BB:OFDM:TRIGger:SLENgth............................................................................................... 80

[:SOURce<hw>]:BB:OFDM:TRIGger:SLUNit.................................................................................................. 80

[:SOURce<hw>]:BB:OFDM:TRIGger:SOURce................................................................................................79

[:SOURce<hw>]:BB:OFDM:TRIGger[:EXTernal]:DELay................................................................................. 81

[:SOURce<hw>]:BB:OFDM:TRIGger[:EXTernal]:INHibit................................................................................. 82

[:SOURce<hw>]:BB:OFDM:UFMC:NSUBand................................................................................................. 67

[:SOURce<hw>]:BB:OFDM:UFMC:PREequal.................................................................................................68

[:SOURce<hw>]:BB:OFDM:USER<ch0>:DATA.............................................................................................. 68

[:SOURce<hw>]:BB:OFDM:USER<ch0>:LIST................................................................................................68

[:SOURce<hw>]:BB:OFDM:USER<ch0>:PATTern..........................................................................................69

[:SOURce<hw>]:BB:OFDM:USER<ch0>:PWR............................................................................................... 69

[:SOURce<hw>]:BB:OFDM:USER<ch0>:STATe.............................................................................................69

[:SOURce<hw>]:BB:OFDM:WAVeform:CREate..............................................................................................59

[:SOURce<hw>]:BB:OFDM[:TRIGger]:SEQuence.......................................................................................... 79

List of commands

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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 ..................................................................... 31

Brochures ............................................................................ 7

Catalog

User filter .................................................................... 35

Clock

Source ........................................................................ 55

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

Codebook size M .............................................................. 45

Common trigger settings ................................................... 49

Conventions

SCPI commands ......................................................... 56

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 .................................................................. 36

Data sheets ......................................................................... 7

Default settings

OFDM signal generation ............................................. 25

Delay

Marker ......................................................................... 54

Trigger .........................................................................52

Delete

User filter .................................................................... 35

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 .................................................................. 51

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

Instrument help ................................................................... 6

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Index

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

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) ................................. 7

OQAM

Principle ...................................................................... 12

Pilot

Signal analyzer ........................................................... 42

PN9

Preamble .................................................................... 42

Preamble symbols

Number ....................................................................... 42

Raised cosine filter

see Cosine filter .......................................................... 33

Release notes ..................................................................... 7

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 .................................................................... 31

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 in a new window ................................................ 47

Trigger

Sync. output ................................................................ 50

Trigger delay ..................................................................... 52

Actual .......................................................................... 52

Expressed in time ....................................................... 52

Resulting ..................................................................... 52

Unit ............................................................................. 52

Trigger mode ..................................................................... 49

Trigger signal duration .......................................................50

Trigger source ................................................................... 50

UFMC

Filter parameters ......................................................... 34

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R&S®SMBVB-K114

User

Boost ........................................................................... 39

Data source ................................................................ 38

How many ................................................................... 38

Power offset ................................................................ 39

State ........................................................................... 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

95User Manual 1178.8236.02 ─ 08

Rohde&Schwarz SMBVB-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 Service manual

1.3.4 Instrument security procedures

1.3.5 Printed safety instructions

1.3.6 Data sheets and brochures

1.3.7 Release notes and open source acknowledgment (OSA)

1.3.8 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 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

4.6 Allocation commands

4.7 SCMA commands

Trigger commands

4.9 Marker commands

Clock commands

Annex

A XML settings file

Glossary: List of terms and abbreviations

Glossary: Specifications, references and further information

List of commands

Index