IEEE 802.16 WiMAX
Digital Standard for
R&S®Signal Generators
Operating Manual
(;ÕÂÛ<)
1171.5277.12 ─ 16
Operating Manual
Test & Measurement
This document describes the following software options:
●
R&S®SMBV-K49
1415.8119.xx
●
R&S®SMU-K49
1161.0366.02
●
R&S®AMU-K49
1402.7002.02
●
R&S®SMATE-K49
1404.6803.02
●
R&S®SMJ-K49
1404.1101.02
This manual version corresponds to firmware version:
FW 3.20.281.xx and later of the R&S®SMBV100A
FW 2.20.360.142 and later of the R&S®SMU200A, R&S®SMATE200A, R&S®SMJ100A and
R&S®AMU200A
© 2015 Rohde & Schwarz GmbH & Co. KG
Mühldorfstr. 15, 81671 München, Germany
Phone: +49 89 41 29 - 0
Fax: +49 89 41 29 12 164
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.
WiMAX Forum® is a registered trademark of the WiMAX Forum. WiMAXTM, the WiMAX Forum logo, WiMAX Forum CertifiedTM and
the WiMAX Forum Certified logo are trademarks of the WiMAX Forum.
Trade names are trademarks of the owners.
The following abbreviations are used throughout this manual: R&S®SMBV100A is abbreviated as R&S SMBV, R&S®SMU200A is
abbreviated as R&S SMU, R&S®AMU200A is abbreviated as R&S AMU, R&S®SMATE200A is abbreviated as R&S SMATE,
R&S®SMJ100A is abbreviated as R&S SMJ, R&S®WinIQSIM2TM is abbreviated as R&S WinIQSIM2; the license types
02/03/07/11/13/16/12 are abbreviated as xx.
ContentsIEEE 802.16 WiMAX
Contents
1 Preface.................................................................................................... 7
1.1 Documentation Overview............................................................................................. 7
1.2 Conventions Used in the Documentation...................................................................8
1.2.1 Typographical Conventions.............................................................................................8
1.2.2 Notes on Screenshots.....................................................................................................9
1.2.3 Naming of Software Options........................................................................................... 9
2 Introduction.......................................................................................... 11
3 WiMAX User Interface..........................................................................15
3.1 General Settings for WiMAX Signals.........................................................................16
3.2 Frame Configuration OFDM....................................................................................... 24
3.2.1 Frame Configuration Common Settings........................................................................25
3.2.2 Burst Table....................................................................................................................28
3.2.3 Frame Burst Graph OFDM............................................................................................32
3.3 Active Carrier Graph OFDM....................................................................................... 32
3.4 FCH Configuration Downlink OFDM..........................................................................33
3.5 DL-MAP Configuration Downlink OFDM................................................................... 35
3.6 Generate UL-MAP Uplink OFDM................................................................................ 37
3.7 UL-MAP Configuration Downlink OFDM................................................................... 38
3.8 More Parameters Uplink OFDM................................................................................. 39
3.9 MAC Header Configuration OFDM.............................................................................39
3.10 Frame Configuration OFDMA.....................................................................................41
3.10.1 Frame Configuration Common Settings........................................................................41
3.10.2 Time Plan...................................................................................................................... 44
3.10.3 Zone Table.................................................................................................................... 45
3.11 Zone Configuration OFDMA.......................................................................................47
3.11.1 OFDMA Common Zone Settings.................................................................................. 47
3.11.2 Burst Table....................................................................................................................50
3.12 Sounding Zone Configuration OFDMA..................................................................... 55
3.12.1 OFDMA Sounding Zone Settings..................................................................................56
3.12.2 Sounding Table............................................................................................................. 58
3.13 CSTD OFDMA.............................................................................................................. 61
3Operating Manual 1171.5277.12 ─ 16
ContentsIEEE 802.16 WiMAX
3.14 FCH Configuration Downlink OFDMA....................................................................... 63
3.15 DL-MAP Configuration Downlink OFDMA.................................................................65
3.16 Data Configuration OFDMA........................................................................................69
3.16.1 OFDMA Data Configuration Settings............................................................................ 69
3.16.2 PDU Table.....................................................................................................................73
3.17 UL-MAP Configuration Downlink OFDMA.................................................................74
3.18 Generate UL-MAP Uplink OFDMA............................................................................. 78
3.19 Ranging Uplink OFDMA..............................................................................................80
3.20 HARQ Configuration OFDMA.....................................................................................81
3.20.1 OFDMA HARQ Settings................................................................................................82
3.20.2 HARQ Sub-burst Table................................................................................................. 84
3.21 Fast Feedback Configuration OFDMA...................................................................... 87
3.22 SUB-DL-UL-MAP Configuration OFDMA...................................................................89
3.23 MAC Header Configuration OFDMA.......................................................................... 90
3.24 PDU MAC Configuration OFDMA...............................................................................92
3.25 Filter / Clipping Settings.............................................................................................95
3.25.1 Filter Settings................................................................................................................ 95
3.25.2 Clipping Settings........................................................................................................... 98
3.25.3 Data Dump.................................................................................................................... 98
3.26 Trigger/Marker/Clock Settings................................................................................... 99
3.26.1 Trigger In.....................................................................................................................100
3.26.2 Marker Mode............................................................................................................... 104
3.26.3 Marker Delay...............................................................................................................105
3.26.4 Clock Settings............................................................................................................. 106
3.26.5 Global Settings............................................................................................................108
4 Remote-Control Commands............................................................. 109
4.1 General Commands.................................................................................................. 110
4.2 Filter/Clipping Settings.............................................................................................118
4.3 Trigger Settings.........................................................................................................124
4.4 Marker Settings......................................................................................................... 129
4.5 Clock Settings........................................................................................................... 132
4.6 OFDMA Physical Layer Settings..............................................................................135
4.7 OFDM Physical Layer Settings................................................................................ 197
4Operating Manual 1171.5277.12 ─ 16
ContentsIEEE 802.16 WiMAX
List of Commands..............................................................................217
Index....................................................................................................223
5Operating Manual 1171.5277.12 ─ 16
ContentsIEEE 802.16 WiMAX
6Operating Manual 1171.5277.12 ─ 16
1 Preface
PrefaceIEEE 802.16 WiMAX
Documentation Overview
1.1 Documentation Overview
The user documentation for the R&S Signal Generator consists of the following parts:
●
Online Help system on the instrument,
●
"Quick Start Guide" printed manual,
●
Documentation CD-ROM with:
– Online help system (*.chm) as a standalone help,
– Operating Manuals for base unit and options,
– Service Manual,
– Data sheet and specifications,
– Links to useful sites on the R&S internet.
Online Help
The Online Help is embedded in the instrument's firmware. It offers quick, context-sensitive access to the complete information needed for operation and programming. The
online help contains help on operating the R&S Signal Generator and all available
options.
Quick Start Guide
The Quick Start Guide is delivered with the instrument in printed form and in PDF format on the Documentation CD-ROM. It provides the information needed to set up and
start working with the instrument. Basic operations and an example of setup are described. The manual includes also general information, e.g., Safety Instructions.
Operating Manuals
The Operating Manuals are a supplement to the Quick Start Guide. Operating Manuals
are provided for the base unit and each additional (software) option.
These manuals are available in PDF format - in printable form - on the Documentation
CD-ROM delivered with the instrument. In the Operating Manual for the base unit, all
instrument functions are described in detail. Furthermore, it provides an introduction to
remote control and a complete description of the remote control commands with programming examples. Information on maintenance, instrument interfaces and error
messages is also given.
In the individual option manuals, the specific functions of the option are described in
detail. For additional information on default settings and parameters, refer to the data
sheets. Basic information on operating the R&S Signal Generator is not included in the
option manuals.
7Operating Manual 1171.5277.12 ─ 16
PrefaceIEEE 802.16 WiMAX
Conventions Used in the Documentation
Service Manual
The Service Manual is available in PDF format - in printable form - on the Documentation CD-ROM delivered with the instrument. It describes how to check compliance with
rated specifications, on instrument function, repair, troubleshooting and fault elimination. It contains all information required for repairing the instrument by the replacement
of modules.
This manual can also be orderd in printed form (see ordering information in the data
sheet).
Release Notes
The release notes describe new and modified functions, eliminated problems, and last
minute changes to the documentation. The corresponding firmware version is indicated
on the title page of the release notes. The current release notes are provided in the
Internet.
Web Help
The web help provides online access to the complete information on operating the
R&S Signal Generator and all available options, without downloading. The content of
the web help corresponds to the user manuals for the latest product version.
The web help is available on the R&S Signal Generator product page at the Downloads > Web Help area.
Application Notes
Application notes, application cards, white papers and educational notes are further
publications that provide more comprehensive descriptions and background information.
The latest versions are available for download from the Rohde & Schwarz website, at
http://www.rohde-schwarz.com/appnotes.
1.2 Conventions Used in the Documentation
1.2.1 Typographical Conventions
The following text markers are used throughout this documentation:
Convention Description
"Graphical user interface elements"
KEYS Key names are written in capital letters.
All names of graphical user interface elements on the screen, such as
dialog boxes, menus, options, buttons, and softkeys are enclosed by
quotation marks.
8Operating Manual 1171.5277.12 ─ 16
Convention Description
PrefaceIEEE 802.16 WiMAX
Conventions Used in the Documentation
File names, commands,
program code
Input Input to be entered by the user is displayed in italics.
Links Links that you can click are displayed in blue font.
"References" References to other parts of the documentation are enclosed by quota-
1.2.2 Notes on Screenshots
File names, commands, coding samples and screen output are distinguished by their font.
tion marks.
When describing the functions of the product, we use sample screenshots. These
screenshots are meant to illustrate as much as possible of the provided functions and
possible interdependencies between parameters. The shown values may not represent
realistic test situations.
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.
1.2.3 Naming of Software Options
In this operating manual, we explicitly refer to options required for specific functions of
the digital standard.
The name of software options for signal generators vary in the name of the instrument,
but the option name is identical. Therefore we use in this manual the placeholder
R&S SMx/AMU.
Example:
Naming for an option of the vector signal generator R&S SMBV100A, e.g:
●
R&S SMx/AMU-K99, stands for R&S SMBV-K99
The particular software options available for the corresponding instruments are listed
on the back of the title page.
9Operating Manual 1171.5277.12 ─ 16
PrefaceIEEE 802.16 WiMAX
Conventions Used in the Documentation
10Operating Manual 1171.5277.12 ─ 16
IntroductionIEEE 802.16 WiMAX
2 Introduction
The R&S SMx/AMU-K49 provides you with the ability to generate signals in accordance with the Institute of Electrical and Electronics Engineers (IEEE 802.16-2004)
standard.
To playback a signal from a waveform file created by the simulation software
R&S WinIQSIM2, the corresponding R&S WinIQSIM2 digital standard option must be
installed.
WiMAX is a wireless metropolitan-area network technology that provides interoperable
broadband wireless connectivity to fixed and portable users. It provides up to 50 kilometers of service area, allows users to get broadband connectivity without the need of
direct line-of-sight to the base station, and provides total data rates up to 75 Mbps enough bandwidth to simultaneously support hundreds of businesses and homes with
a single base station.
The R&S Signal Generator generates the IEEE 802.16 WiMAX signals in the arbitrary
waveform mode; the signal is first calculated and then output.
The R&S Signal Generator simulates IEEE 802.16 WiMAX at the physical level.
Supported features include:
●
Configuration of OFDM (orthogonal frequency division multiplexing) and OFDMA
(orthogonal frequency division multiple access) physical layer mode.
●
Downlink and Uplink mode.
●
Pre-defined settings for receiver tests.
●
All frame duration settings defined by the standard, including a "user" mode with
freely configurable Frame Duration, and a "continuous" mode. In "continuous"
mode, gaps between bursts/subframes are eliminated.
●
Sequence length of up to 511 frames.
●
Up to 64 bursts per frame/zone with independent power setting.
●
Channel bandwidth and sampling rate settings according to the ETSI, MMDS,
WCS, U-NII or WiBro bands, or alternatively arbitrary settings in "User" mode.
●
Full RS/CC, CC and CTC channel coding.
●
BPSK, QPSK, 16-QAM or 64-QAM modulation, independently configurable for any
of the 64 bursts.
●
FCH, DL-MAP and UL-MAP burst generation in "automatic" mode (using signal
configuration parameters set by the user) or in "user" mode, with arbitrary data.
●
Ranging Bursts in uplink
●
Up to 8 Zones per frame in OFDMA mode
●
Predefined data sources such as PN9, PN11 and others, or arbitrary user data.
●
Optional generic MAC headers and CRC for each burst.
●
Subchannelization modes.
●
Clipping for reducing the crest factor.
11Operating Manual 1171.5277.12 ─ 16
IntroductionIEEE 802.16 WiMAX
Table 2-1: Parameters of the modulation system IEEE 802.16 WiMAX
Digital standard 802.16-2004 meets IEEE Std 802.16™-2004/Cor2/D4 and
802.16e-2005
Physical layer modes OFDM, OFDMA, OFDMA – WiBro
Link direction forward link and reverse link
Frame durations 2, 2.5, 4, 5, 8, 10, 12.5, 20 ms, continuous, user
definable
Sequence length 1 – 511 frames (depending on frame duration)
Clipping Vector or scalar clipping, applied before filtering
Marker modes Restart, frame start, frame active part, pulse, pat-
tern, on/off ratio
Parameters in OFDM Mode
Duplexing TDD, FDD
Predefined frames Short, mid and long length test messages for testing
Level reference FCH/Burst or preamble level
Frequency bands ETSI, MMDS, WCS, U-NII, User
Channel bandwidth 1.25 – 30 MHz, depending on selected frequency
Sampling rate 1.5 – 32 MHz, depending on channel bandwidth
Tg / Tb settings 1/4, 1/8, 1/16, 1/32
FFT size 256 (fixed)
Nr. Of possible subchannels in subchannelization
mode
Nr. Of bursts per frame 0 – 64
Preamble / midamble modes Burst preamble / midambles off, burst preamble in
Modulation & RS-CC rates BPSK ½, QPSK ½, QPSK ¾, 16-QAM ½, 16-QAM
receivers with all modulation types and RS-CC rates
band
1, 2, 4, 8, 16 (all)
downlink, midamble repetition 5, 9 or 17 in uplink
¾, 64-QAM 2/3, 64-QAM ¾
Data all 0 , all 1, pattern (up to 64 bit), PN 9 to PN 23,
data lists
Burst power range -80 dB - +10 dB
MAC functions One generic MAC header + CRC available per burst
Parameters in OFDMA Mode
Duplexing TDD
Level reference Subframe RMS Power or preamble level (downlink
Frequency bands ETSI, MMDS, WCS, U-NII, WiBro, User
Channel bandwidth 1.25 – 30 MHz, depending on selected frequency
only)
band
12Operating Manual 1171.5277.12 ─ 16
IntroductionIEEE 802.16 WiMAX
Digital standard 802.16-2004 meets IEEE Std 802.16™-2004/Cor2/D4 and
802.16e-2005
Sampling rate 1.5 – 32 MHz, depending on channel bandwidth
Tg / Tb settings ¼, 1/8, 1/16, 1/32
FFT size 128, 512, 1024 or 2048
Subcarrier Permutation PUSC, FUSC (downlink only), AMC 2x3, Sounding
(uplink only)
Nr. Of bursts per frame 0 – 64
Modulation & CC rates QPSK ½, QPSK ¾, 16-QAM ½, 16-QAM ¾, 64-
QAM ½, 64-QAM 2/3, 64-QAM ¾, 64-QAM 5/6
Data all 0 , all 1, pattern (up to 64 bit), PN 9 to PN 23,
data lists
Burst power range -80 dB - +10 dB
MAC functions One generic MAC header + CRC available per burst
Parameters in OFDMA - WiBro Mode
(identical to OFDMA)
Duplexing TDD
Level reference Subframe RMS Power or preamble level (downlink
Frequency bands ETSI, MMDS, WCS, U-NII, WiBro, User
Channel bandwidth 1.25 – 30 MHz, depending on selected frequency
Sampling rate 1.5 – 32 MHz, depending on channel bandwidth
Tg / Tb settings ¼, 1/8, 1/16, 1/32
FFT size 128, 512, 1024 or 2048
Subcarrier Permutation PUSC, FUSC (downlink only), AMC 2x3, Sounding
Nr. Of bursts per frame 0 – 64
Modulation & CC rates QPSK ½, QPSK ¾, 16-QAM ½, 16-QAM ¾, 64-
Data all 0 , all 1, pattern (up to 64 bit), PN 9 to PN 23,
Burst power range -80 dB - +10 dB
only)
band
(uplink only)
QAM ½, 64-QAM 2/3, 64-QAM ¾, 64-QAM 5/6
data lists
MAC functions One generic MAC header + CRC available per burst
13Operating Manual 1171.5277.12 ─ 16
IntroductionIEEE 802.16 WiMAX
14Operating Manual 1171.5277.12 ─ 16
WiMAX User InterfaceIEEE 802.16 WiMAX
3 WiMAX User Interface
The dialog for setting the IEEE 802.16 WiMAX digital standard is either called from the
baseband block or from the dialog tree under "Baseband".
The dialog is split into several sections for configuring the standard. The choice of
transmission direction determines which displays and parameters are made available
in the lower section.
The upper section of the dialog is where the IEEE 802.16 WiMAX digital standard is
enabled, the default settings are called and the physical layer mode, the duplexing and
the transmission direction are selected. Additional parameters include Frame Duration,
Sequence Length and a set of Predefined Frames for receiver testing.
A button leads to the subdialog for loading and saving the IEEE 802.16 WiMAX configuration.
The buttons of the lower dialog section lead to subdialogs for configuring the frame and
for setting the filter, clipping, trigger, and clock parameters.
15Operating Manual 1171.5277.12 ─ 16
WiMAX User InterfaceIEEE 802.16 WiMAX
General Settings for WiMAX Signals
3.1 General Settings for WiMAX Signals
This dialog provides access to the default and the "Save/Recall" settings, and displays
the valid WiMaX version and the physical layer mode. The choice of link direction and
duplexing determines which parameters are available.
State
Activates the standard and deactivates all the other digital standards and digital modulation modes in the same path.
Note: For two path instruments and enabled parameter Use of Baseband A+B, enabling the WiMAX signal simulation will disable all other digital standards and digital
modulation modes even in the path B.
Remote command:
[:SOURce<hw>]:BB:WIMax:STATe on page 116
Set to Default
Calls the default settings. The values of the main parameters are listed in the following
table.
Parameter Value
General Settings
State Not affected by "Set to default"
Physical Layer Mode OFDM
Version 802.16-2004/Cor1-2005 and 802.16e-2005
Duplexing TDD
Link Direction Downlink
Frame Duration 10 ms
Sequence Length 1 frame
Predefined Frames User
Level Reference FCH/Burst
Clipping Off
OFDM mode
Frequency Band ETSI
Channel Bandwidth 1.75 MHz
Sampling Rate 2.00 MHz
BSID (4 LSBs) 0
Tg/Tb 1/4
Nr. of used Subchannels 16 (all)
Frame Preamble Long
16Operating Manual 1171.5277.12 ─ 16
WiMAX User InterfaceIEEE 802.16 WiMAX
General Settings for WiMAX Signals
Parameter Value
FCH Configuration On, Auto mode, Frame Number Offset = 0 and Con-
figuration Change Count = 0
Nr. of Bursts 1
OFDMA mode
Frequency Band ETSI
Channel Bandwidth 1.75 MHz
Sampling Rate 2.00 MHz
n = 8/7
Tg/Tb 1/4
FFT Size 2048
Subcarrier Permutation PUSC
Subchannel 0 ... 59 State ON
OFDMA - WiBro mode
Frequency Band WiBro
Channel Bandwidth 8.75 MHz
Sampling Rate 10 MHz
n = 8/7
Tg/Tb 1/8
FFT Size 1024
Subcarrier Permutation PUSC
Subchannel 0 … 59 State ON
Frame Duration 5 ms
Remote command:
[:SOURce<hw>]:BB:WIMax:PRESet on page 114
Save/Recall
Calls the "Save/Recall" dialog.
From the "Save/Recall" dialog, the "File Select" windows for saving and recalling IEEE
802.16 WiMAX configurations and the "File Manager" can be called.
IEEE 802.16 WiMAX configurations are stored as files with the predefined file extension *.wimax. The file name and the directory they are stored in are user-definable.
The complete settings in the "IEEE 802.16 WiMAX" dialog are saved and recalled.
17Operating Manual 1171.5277.12 ─ 16
WiMAX User InterfaceIEEE 802.16 WiMAX
General Settings for WiMAX Signals
"Recall WiMAX
Setting"
"Save WiMAX
Setting"
"File Manager"
Remote command:
[:SOURce<hw>]:BB:WIMax:SETTing:CATalog? on page 114
[:SOURce<hw>]:BB:WIMax:SETTing:LOAD on page 115
[:SOURce<hw>]:BB:WIMax:SETTing:STORe on page 115
[:SOURce<hw>]:BB:WIMax:SETTing:DELete on page 115
Data List Management…
Calls the "Data List Management" dialog. This dialog is used to create and edit a data
list.
Opens the "File Select" window for loading a saved IEEE 802.16
WiMAX configuration.
The configuration of the selected (highlighted) file is loaded by pressing the "Select" button.
Opens the "File Select" window for saving the current IEEE 802.16
WiMAX signal configuration.
The name of the file is specified in the "File name" entry field, the
directory selected in the "save into" field. The file is saved by pressing
the "Save" button.
Calls the "File Manager".
The "File Manager" is used to copy, delete, and rename files and to
create new directories.
All data lists are stored as files with the predefined file extension *.dm_iqd. The file
name and the directory they are stored in are user-definable.
The data lists must be selected as a data source from the subdialogs under the individual function, e.g. in the channel table of the cells.
Note: All data lists are generated and edited by means of the SOURce:BB:DM subsystem commands. Files containing data lists usually end with *.dm_iqd. The data lists are
selected as a data source for a specific function in the individual subsystems of the digital standard.
18Operating Manual 1171.5277.12 ─ 16
WiMAX User InterfaceIEEE 802.16 WiMAX
General Settings for WiMAX Signals
Example: Creating and editing the data list
SOUR:BB:DM:DLIS:SEL "d_list1"
SOUR:BB:DM:DLIS:DATA #B1111010101000001111....
SOUR:BB:DM:DLIS:DATA:APP #B1111010101000001111....
Remote command:
[:SOURce<hw>]:BB:WIMax:AOFDm[:ZONE<st0>]:BURSt<ch0>:DATA
on page 160
[:SOURce<hw>]:BB:WIMax:AOFDm[:ZONE<st0>]:BURSt<ch0>:DATA:DSELect
on page 160
[:SOURce<hw>]:BB:WIMax:OFDM:BURSt<ch0>:DATA on page 199
[:SOURce<hw>]:BB:WIMax:OFDM:BURSt<ch0>:DATA:DSELect on page 199
[:SOURce<hw>]:BB:WIMax:OFDM:FCH:DATA on page 208
[:SOURce<hw>]:BB:WIMax:OFDM:FCH:DATA:DSELect on page 209
Generate Waveform File…
Calls the "Generate Waveform" dialog. This dialog is used to store the current WiMAX
signal as ARB signal in a waveform file.
This file can be loaded in the "ARB" dialog and processed as multicarrier or multisegment signal.
The file name is entered in the subdialog. The file is stored with the predefined file
extension *.wv. The file name and the directory it is stored in are user-definable.
Remote command:
[:SOURce<hw>]:BB:WIMax:WAVeform:CREate on page 117
Physical Layer Mode
Selects the physical layer mode.
The settings of the frame are provided in the subdialog "Frame Configuration" (see
Frame Configuration OFDM) in accordance with the selection.
"OFDM"
"OFDMA"
The OFDM mode supports signal generation according to IEEE
802.16-2004 section 8.3 with a fixed FFT size of 256.
Orthogonal Frequency Division Multiple Access (OFDMA) groups
multiple subcarriers of the OFDM into sub-channels. A single client or
subscriber station might transmit using all of the sub-channels within
the carrier space, or multiple clients might transmit with each using a
portion of the total number of sub-channels simultaneously. OFDMA
thus enables a more flexible use of resources. It can support nomadic
and mobile operation.
19Operating Manual 1171.5277.12 ─ 16
WiMAX User InterfaceIEEE 802.16 WiMAX
General Settings for WiMAX Signals
"OFDMA WiBro"
Remote command:
[:SOURce<hw>]:BB:WIMax:MODE on page 112
Version
Selects the version of the standard to use.
"802.16
Rev2/D3"
"802.16-2004/
Cor1-2005 and
802.16e-2005"
Remote command:
[:SOURce<hw>][:BB]:WIMax:SVERsion on page 117
The OFDMA – WiBro (Wireless Broadband) mode groups multiple
subcarriers of the OFDM into sub-channels. A single client or subscriber station might transmit using all of the sub-channels within the
carrier space, or multiple clients might transmit with each using a portion of the total number of sub-channels simultaneously. OFDMA thus
enables a more flexible use of resources. It can support nomadic and
mobile operation.
The OFDMA – WiBro mode is identical to the OFDMA mode. When
selecting OFDMA – WiBro, these parameters are set to their WiBro
defaults (see Set to Default):
●
Frame Duration: 5ms
●
Frequency Band: WiBro
●
Channel Bandwidth: 8.75 MHz
●
Sampling Rate: 10 MHz
●
Tg/Tb: 1/8
●
FFT Size: 1024
Selecting "802.16 Rev2/D3" ensures that all signal parameters are in
line with the latest Revision 2 version of the standard.
Using this mode is recommended.
Selecting 802.16-2004/Cor1-2005 and 802.16e-2005 provides backward compatibility for devices that do not yet comply with the latest
Release 2 version.
Duplexing
Selects the duplexing. The duplexing mode determines how the uplink and downlink
signals are separated.
"TDD"
"FDD (OFDM
only)"
Remote command:
[:SOURce<hw>]:BB:WIMax:DUPLexing on page 111
In TDD mode, the same frequency is used for both directions of
transmission (uplink and downlink). With one baseband, either downlink or uplink frames can be generated.
In FDD mode, different frequencies are used for downlink and uplink
directions. If only one link direction is considered at once, the IEEE
802.16 standard defines no differences between TDD and FDD signals on the physical layer.
The FDD mode has been provided for convenience, it completely fills
the defined frame with bursts to simulate a continuous transmission
environment. It is recommended to use TDD mode instead if FDD
devices are to be tested with frames including transmission gaps.
20Operating Manual 1171.5277.12 ─ 16
WiMAX User InterfaceIEEE 802.16 WiMAX
General Settings for WiMAX Signals
Link Direction
Selects the transmission direction.
"Downlink"
"Uplink"
Remote command:
[:SOURce<hw>]:BB:WIMax:LINK on page 112
Frame Duration
Selects the frame duration.
Only distinct values are allowed in the standard. For test reasons, continuous generation or generation for a freely selectable duration (User) are available. In continuous
mode, the frame duration equals the sum of the burst durations in OFDM mode or the
subframe duration in OFDMA mode.
Remote command:
[:SOURce<hw>]:BB:WIMax:FRAMe:TIME on page 112
The transmission direction selected is base station to subscriber station. The signal corresponds to that of a base station.
The transmission direction selected is subscriber station to base station. The signal corresponds to that of a subscriber station.
User Frame Duration
(available for Frame Duration set to User)
Sets the frame duration for selection User. The values are freely selectable.
Remote command:
[:SOURce<hw>]:BB:WIMax:FRAMe:TIME:USER on page 112
Downlink Subframe Duration
(available for uplink direction in TDD mode)
Delays the first uplink burst by the set time duration.
Remote command:
[:SOURce<hw>]:BB:WIMax:SUBFrame:TIME on page 117
Initial Delay of Burst 1
(available for the uplink direction in FDD mode with physical layer mode OFDM)
Delays the first uplink burst by the set time duration.
In FDD mode, this parameter is provided for convenience to enable a constant delay of
the signal with respect to an internal or external frame trigger.
Remote command:
[:SOURce<hw>]:BB:WIMax:FRAMe:BURSt:DELay on page 111
Sequence Length
Sets the sequence length of the signal in number of frames. The signal is calculated in
advance and output in the arbitrary waveform generator. Burst data sources are continuously read over the whole sequence length.
Remote command:
[:SOURce<hw>]:BB:WIMax:SLENgth on page 116
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WiMAX User InterfaceIEEE 802.16 WiMAX
General Settings for WiMAX Signals
Predefined Frames
Selects the frame type.
"Test Message BPSK 1/2 Short, Test Message BPSK 1/2 Mid,…(OFDM only)"
Predefined setups for receiver test messages according to IEEE
802.16-2004 section 8.3.11
"Downlink/Uplink 35MHz QPSK 1/2, Downlink/Uplink 35MHz QPSK 3/4,…(OFDMA/
OFDMA-WiBro only)"
Predefined setups for receiver test messages. The available predefined frames depend on the selected link direction.
"User"
Remote command:
[:SOURce<hw>]:BB:WIMax:OFDM:FRAMe:PREDefined on page 211
[:SOURce<hw>]:BB:WIMax:AOFDm:FRAMe:PREDefined on page 140
Level Reference
Selects the level reference.
"FCH / Burst (OFDM only)"
"Preamble (OFDM uplink and downlink OFDMA/OFDMA - WiBro downlink only)"
"Subframe RMS Power (OFDMA/OFDMA - WiBro only)"
"Subframe RMS Power w/o Preamble (OFDMA/OFDMA - WiBro only)"
Remote command:
[:SOURce<hw>]:BB:WIMax:OFDM:POWer:REFerence on page 212
[:SOURce<hw>]:BB:WIMax:AOFDm:POWer:REFerence on page 142
The settings for the frame can be defined by the user.
The instrument's level setting refers to the mean power of FCH
(Frame Control Header) or bursts with a burst power setting of 0 dB.
To obtain the absolute burst power value, the burst power value has
to be added to the level value.
The instrument's level setting refers to the preamble, which is
FCH / Burst power + 3dB in OFDM mode.
The instrument's level setting refers to the rms power of the subframe. This includes the preamble and all symbols with allocated carriers in downlink or the whole uplink subframe in uplink.
The instrument's level setting refers to the rms power of the subframe, excluding the preamble. This includes all symbols with allocated carriers in downlink or the whole uplink subframe in uplink.
Use Baseband A+B
(Available only in path A of two-path instruments and for OFDMA and OFDMA-WIBro
Physical Layer Mode)
Enables/disables control of both paths via the WiMAX dialog.
Note: For two path instruments and enabled parameter Use of Baseband A+B, enabling the WiMAX signal simulation disables all other digital standards and digital modulation modes in path B.
22Operating Manual 1171.5277.12 ─ 16
WiMAX User InterfaceIEEE 802.16 WiMAX
General Settings for WiMAX Signals
An active Baseband A+B mode is useful for STC (MIMO) signal setups. In this case,
baseband B is controlled from baseband A and generates an identical setup, just with
opposite STC antenna configuration. Triggering is performed automatically such that
both basebands are aligned in time.
Example:
1. Configure baseband A to generate one SISO zone (set the parameter "Space-Time
Coding Mode" to off for this zone)
2. Configure one additional STC zone with antenna 0 (parameter "Space-Time Coding
Antenna" set to Antenna 0).
3. Enable parameter "Use Baseband A+B".
4. Switch on baseband A .
4.1 Baseband B is automatically activated.
4.2 Baseband A generates preamble, SISO zone and STC zone with antenna 0.
4.3 Baseband B omits preamble and SISO zone and generates the STC zone with
antenna 1.
For STC modes with 4 antennas, using antenna 0 in baseband A generates antenna 1
in baseband B. Using antenna 2 in baseband A generates antenna 3 in baseband B. A
two-path instrument can either provide antennas 0 & 1 or antennas 2 & 3.
Remote command:
[:SOURce<hw>]:BB:WIMax:PATH:COUPling[:STATe] on page 113
Power Of Baseband B Relative to A
(Available only in path A of two-path instruments and enabled parameter Use Baseband A+B)
This parameter sets the relative power offset of path B compared to the power level of
the path A.
A value of 0 dB refers to the level set in the main RF level setting of the instrument.
Negative values lower the level of baseband B, i.e. the level of Baseband A matches
the main level setting, Baseband B is offset by the set amount. The level display of
path B is however not changed.
Positive values lower the level of baseband A, i.e. the level of Baseband B matches the
main level setting, Baseband A is offset by the set amount. The level display of path A
is however not changed.
Remote command:
[:SOURce<hw>]:BB:WIMax:PATH:COUPling[:STATe] on page 113
[:SOURce<hw>]:BB:WIMax:PATH:COUPling:POFFset on page 113
Frame Configuration
Accesses the dialog for configuration of the frame.
23Operating Manual 1171.5277.12 ─ 16
WiMAX User InterfaceIEEE 802.16 WiMAX
Frame Configuration OFDM
The dialog depends on the selected physical layer mode, see chapter 3.2, "Frame
Configuration OFDM", on page 24 and chapter 3.10, "Frame Configuration OFDMA",
on page 41.
Remote command:
n.a.
Filter / Clipping
Calls the dialog for setting clipping and the sample rate variation of the arbitrary waveform. The current setting is displayed next to the button.
The dialog is described in chapter 3.25, "Filter / Clipping Settings", on page 95
Remote command:
n.a.
Trigger/Marker
(R&S SMx and R&S AMU instruments only)
Calls the dialog for selecting the trigger source, for configuring the marker signals and
for setting the time delay of an external trigger signal (see chapter 3.26, "Trigger/
Marker/Clock Settings", on page 99).
The currently selected trigger source is displayed to the right of the button.
Remote command:
n.a.
Execute Trigger
Executes trigger manually.
A manual trigger can be executed only when an internal trigger source and a trigger
mode other than "Auto" have been selected.
Remote command:
[:SOURce<hw>]:BB:WIMax:TRIGger:EXECute on page 124
Clock
(R&S SMx and R&S AMU instruments only)
Calls the dialog for selecting the clock source and for setting a delay (see chap-
ter 3.26.4, "Clock Settings", on page 106).
Remote command:
n.a.
3.2 Frame Configuration OFDM
This dialog provides all parameters to configure frames in OFDM mode. The selected
link direction determines the availale parameters.
The dialog shows the parameters and graph for downlink direction.
24Operating Manual 1171.5277.12 ─ 16
WiMAX User InterfaceIEEE 802.16 WiMAX
Frame Configuration OFDM
3.2.1 Frame Configuration Common Settings
Provided are the following settings:
Frequency Band OFDM
Selects the frequency band for the carrier frequencies. The available ranges for setting
the channel bandwidth and the sampling rate depend on the selection here.
"ETSI"
The frequency band as defined Norm by the European Telecommunications Standards Institute applies.
The range is 1.75 to 28 MHz for the channel bandwidth and 2 to 32
MHz for the sampling rate.
"MMDS"
The frequency band as defined by the"Multichannel Multipoint Distribution Service" applies. The RF frequency range is 2500 to 2686
MHz.
The range is 1.50 to 24 MHz for the channel bandwidth and 1.72 to
27.52 MHz for the sampling rate.
"WCS"
The frequency band as defined by the "Wireless Communication Service" applies. It is in the 2.3 GHz band of the electromagnetic spectrum from 2305 to 2320 MHz and 2345 to 2360 MHz.
The range is 2.5 to 15 MHz for the channel bandwidth and 2.88 to
17.28 MHz for the sampling rate.
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WiMAX User InterfaceIEEE 802.16 WiMAX
Frame Configuration OFDM
"U-NII"
"User"
Remote command:
[:SOURce<hw>]:BB:WIMax:OFDM:FBANd on page 208
Channel Bandwidth OFDM
Sets the channel bandwidth. The range is 1.25 to 28 MHz.
The selected channel bandwidth has to be a multiple of 1.25, 1.5, 1.75, 2.0 or 2.75
MHz. The channel bandwidth determines the parameter n (see Sampling Ratio n
OFDM):
●
For channel bandwidths
– that are a multiple of 1.75 MHz then n = 8/7
– that are a multiple of 1.5 MHz then n = 86/75
– that are a multiple of 1.25 MHz then n = 144/125
– that are a multiple of 2.75 MHz then n = 316/275
– that are a multiple of 2.0 MHz then n = 57/50
●
else for channel bandwidths not otherwise specified then n = 8/7
The sampling rate is derived from the channel bandwidth as follows:
SamplingRate = floor(n * ChannelBandwidth / 8000) * 8000
Remote command:
[:SOURce<hw>]:BB:WIMax:OFDM:BW on page 207
The frequency band as defined by the "Unlicensed National Information Infrastructure" applies. It is in the 5 GHz band of the electromagnetic spectrum from 5150 to 5350 GHz and 5750 to 5825 GHz.
The range is 10 to 20 MHz for the channel bandwidth and 11.52 to
23.04 MHz for the sampling rate.
This mode is provided for choosing any other channel bandwidth /
sampling rate combination.
The range is 1.25 to 28 MHz for the channel bandwidth and 1.44 to
32 MHz for the sampling rate.
Sampling Ratio n OFDM
Indicates the sampling ratio. The sampling ratio is determined by the channel bandwidth (see Channel Bandwidth OFDM).
Remote command:
[:SOURce<hw>]:BB:WIMax:OFDM:N? on page 212
Sampling Rate OFDM
Sets the sampling rate. The possible settings depend on the selected frequency band.
The full range in "User" mode is 1.44 to 32 MHz.
The sampling rate is related to the channel bandwidth by the parameter n:
SamplingRate = floor(n * ChannelBandwidth / 8000) * 8000
Remote command:
[:SOURce<hw>]:BB:WIMax:OFDM:SRATe on page 213
BSID OFDM
Sets the 4 LSBs of the Base Station ID.
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WiMAX User InterfaceIEEE 802.16 WiMAX
Frame Configuration OFDM
The BSID is transmitted in the FCH (when set to "Auto" mode), and it is used to initialize the randomizer.
Remote command:
[:SOURce<hw>]:BB:WIMax:OFDM:BSID on page 198
No. of Bursts OFDM
Sets the number of active bursts in one frame.
With number of bursts = 0, a preamble only or a preamble with an FCH burst is generated.
Remote command:
[:SOURce<hw>]:BB:WIMax:OFDM:BURSt[:COUNt] on page 207
Tg/Tb Ratio OFDM
Selects the ratio of guard period to symbol period.
This value sets the length of the cyclic prefix in fractions of the symbol period.
Remote command:
[:SOURce<hw>]:BB:WIMax:OFDM:TGTB on page 215
No. of Used Subchannels OFDM
Selects the number of used subchannels.
Selection 16 (all) deactivates subchannelization and activates all possible carriers. The
values 1, 2, 4 and 8 activate only a part of the available subcarriers, unused carriers
are blanked.
Remote command:
[:SOURce<hw>]:BB:WIMax:OFDM:SUBChannel[:COUNt] on page 214
Subchannel Index OFDM
Selects the subchannel index in subchannelization mode.
The subchannel index determines the set of used subcarriers according to table 213 of
IEEE 802.16-2004 standard.
Remote command:
[:SOURce<hw>]:BB:WIMax:OFDM:SUBChannel:INDex on page 214
Frame Preamble OFDM
Activates the generation of a frame preamble. Either a long preamble or a short preamble can be activated.
The 802.16 standard requires a long preamble as frame start.
Remote command:
[:SOURce<hw>]:BB:WIMax:OFDM:PREamble:MODE on page 213
Frame Number OFDM
Selects the frame number of the uplink frame in which the UL map that specifies the
uplink burst was transmitted.
Remote command:
[:SOURce<hw>]:BB:WIMax:OFDM:FRAMe[:NUMBer] on page 212
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WiMAX User InterfaceIEEE 802.16 WiMAX
Frame Configuration OFDM
Configure FCH OFDM
Accesses the dialog for configuring FCH mode and parameters (see chapter 3.4, "FCH
Configuration Downlink OFDM", on page 33).
Remote command:
n.a.
Generate UL-MAP...
Accesses the dialog for generating the UL-Map, see chapter 3.7, "UL-MAP Configura-
tion Downlink OFDM", on page 38.
Remote command:
n.a.
3.2.2 Burst Table
The "burst table" is located in the lower part of the dialog. The burst table is where the
individual burst parameters are set. A graphic display below the table shows length,
position and power of all configured bursts within the frame
Up to 64 bursts can be configured per frame. Each table row defines the settings of
one specific burst, where the first row defines the first burst of the frame and the last
row defines the last burst.
For both transmission directions, different modulations and channel coding rates are
available for each burst. A generic MAC header with encrypted payload and checksum
determination can be activated.
Some setting parameters vary depending on the transmission direction.
The graph below shows the table in uplink direction.
28Operating Manual 1171.5277.12 ─ 16
WiMAX User InterfaceIEEE 802.16 WiMAX
Frame Configuration OFDM
Burst Index OFDM
Displays the consecutive burst index from 0 to 63.
All the rows are always displayed, even if the bursts are inactive. They are switched on
and off by the selection of "No. of Bursts" above the table. The active bursts are highlighted.
Remote command:
n.a.
(selected via the suffix to the keyword BURSt<n>)
Preamble OFDM
Enables generation of the burst preamble.
If activated, a preamble is placed before the burst. Long or short preambles are available. The preamble has the same power as the burst. If subchannelization is used, a
subchannelization preamble is generated accordingly.
Remote command:
[:SOURce<hw>]:BB:WIMax:OFDM:BURSt<ch0>:PREamble:MODE on page 205
Midamble Repetition OFDM
Activates midamble repetition.
If midamble repetition is switched on, midambles are placed into the burst with the
specified interval, i.e. if 5 is selected, every 5th symbol of the burst is a midamble.
A short preamble is used as midamble when subchannelization is off or a subchannelization preamble is used in subchannelization mode. The power of the midambles is
identical to the burst power.
Remote command:
[:SOURce<hw>]:BB:WIMax:OFDM:BURSt<ch0>:MIDamble on page 204
Modulation and RS-CC Rate OFDM
Selects the modulation and channel coding rate. Channel coding includes randomization, reed solomon coding, convolutional coding and interleaving.
For a given modulation type and channel coding rate, the data length determines the
number of symbols and vice versa.
Remote command:
[:SOURce<hw>]:BB:WIMax:OFDM:BURSt<ch0>:FORMat on page 202
Channel Coding OFDM
Switches channel coding on or off.
If channel coding is switched off, the bits read from the data source are directly modulated onto the carriers. Due to randomization missing, this could result in very high
crest factors of the signal.
Remote command:
[:SOURce<hw>]:BB:WIMax:OFDM:BURSt<ch0>:CCODing:STATe on page 199
Data Length OFDM
Determines the data length in bytes.
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WiMAX User InterfaceIEEE 802.16 WiMAX
Frame Configuration OFDM
The given number of bytes is read from the data source. The total number of data
bytes in the burst (before channel coding) is determined as follows:
TotalDataBytes = DataLength + MACHeaderBytes + CRCBytes + TailByte
The tail byte is only added when channel coding is switched on. The same is the case
for the MAC header and CRC, they are not added when switched off. Additionally padding with 0xFF bytes is applied at the end of the data sequence to reach an integer
number of OFDM symbols.
The data length determines the number of symbols and vice versa. The maximum data
length of 10000 bytes defines the maximum number of symbols for a given modulation
type and channel coding rate.
Remote command:
[:SOURce<hw>]:BB:WIMax:OFDM:BURSt<ch0>:DLENgth on page 200
Number of Symbols OFDM
Enters the number of symbols for the selected burst. If the number of symbols is
changed, the data length is adjusted to fill the specified number of symbols with data
so that no padding has to be applied.
The maximum data length of 10 000 bytes defines the maximum number of symbols
for a given modulation type and channel coding rate.
Remote command:
[:SOURce<hw>]:BB:WIMax:OFDM:BURSt<ch0>:SYMBol[:COUNt] on page 206
Data Source OFDM
Selects data source for the selected bursts.
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.
See also "Main Dialog > Data List Management".
Remote command:
[:SOURce<hw>]:BB:WIMax:OFDM:BURSt<ch0>:DATA on page 199
[:SOURce<hw>]:BB:WIMax:OFDM:BURSt<ch0>:DATA:PATTern on page 200
[:SOURce<hw>]:BB:WIMax:OFDM:BURSt<ch0>:DATA:DSELect on page 199
30Operating Manual 1171.5277.12 ─ 16
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