Rohde & Schwarz R&S SMW-K54 User manual

R&S®SMW-K54/-K86/-K142/-K147
IEEE 802.11a/b/g/n/j/p/ac/ax/be
User Manual
1175674902
Version 27
(;ÙÑa2)

This document describes the following software options:
●R&S®SMW-K54 IEEE 802.11a/b/g/n/j/p (1413.4139.xx)
●R&S®SMW-K86 IEEE 802.11ac (1413.5635.xx)
●R&S®SMW-K142 IEEE 802.11ax (1414.3259.xx)
●R&S®SMW-K147 IEEE 802.11be (1413.6677.xx)
This manual describes firmware version FW 5.20.043.xx and later of the R&S®SMW200A.
© 2023 Rohde & Schwarz GmbH & Co. KG
Muehldorfstr. 15, 81671 Muenchen, Germany
Phone: [phone] - 0
Email: [email protected]
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.
All other trademarks are the properties of their respective owners.
1175.6749.02 | Version 27 | R&S®SMW-K54/-K86/-K142/-K147
The following abbreviations are used throughout this manual: R&S®SMW200A is abbreviated as R&S SMW, R&S®WinIQSIM2TM is
abbreviated as R&S WinIQSIM2; the license types 02/03/07/11/13/16/12 are abbreviated as xx.

Contents
R&S®SMW-K54/-K86/-K142/-K147
3User Manual 1175.6749.02 ─ 27
Contents
1 Welcome to the IEEE 802.11 WLAN digital standard.......................... 7
1.1 Key features...................................................................................................................7
1.2 Accessing the IEEE 802.11 WLAN dialog................................................................... 8
1.3 What's new.....................................................................................................................8
1.4 Documentation overview..............................................................................................9
1.4.1 Getting started manual....................................................................................................9
1.4.2 User manuals and help................................................................................................... 9
1.4.3 Tutorials...........................................................................................................................9
1.4.4 Service manual............................................................................................................... 9
1.4.5 Instrument security procedures.....................................................................................10
1.4.6 Printed safety instructions............................................................................................. 10
1.4.7 Data sheets and brochures........................................................................................... 10
1.4.8 Release notes and open source acknowledgment (OSA)............................................ 10
1.4.9 Application notes, application cards, white papers, etc.................................................10
1.4.10 Videos............................................................................................................................11
1.5 Scope............................................................................................................................11
1.6 Notes on screenshots.................................................................................................11
2 About the IEEE 802.11 WLAN options................................................12
2.1 Required options.........................................................................................................12
2.2 About IEEE 802.11 WLAN technology.......................................................................12
2.3 Operation modes.........................................................................................................14
2.4 Signal generation........................................................................................................ 16
3 WLAN configuration and settings...................................................... 17
3.1 General settings.......................................................................................................... 17
3.2 Transmit antenna setup..............................................................................................21
3.3 Frame block configuration......................................................................................... 23
3.4 PPDU configuration.................................................................................................... 30
3.4.1 General settings............................................................................................................ 30
3.4.2 HE settings....................................................................................................................36
3.4.3 EHT settings..................................................................................................................43
3.4.4 User configuration settings............................................................................................49

Contents
R&S®SMW-K54/-K86/-K142/-K147
4User Manual 1175.6749.02 ─ 27
3.4.5 Data settings................................................................................................................. 54
3.5 A-MPDU settings......................................................................................................... 60
3.6 MAC header and FCS configuration for frame block...............................................62
3.6.1 MAC header and FCS...................................................................................................63
3.6.2 802.11 MAC frame field.................................................................................................63
3.6.3 Beacon settings.............................................................................................................67
3.6.4 Trigger frame settings................................................................................................... 74
3.7 MAC header HT/HE and VHT configuration..............................................................81
3.7.1 Common settings.......................................................................................................... 83
3.7.2 MAC HT configuration...................................................................................................83
3.7.3 MAC VHT configuration................................................................................................ 86
3.7.4 MAC HE control field settings....................................................................................... 90
3.8 Spatial mapping.......................................................................................................... 91
4 How to work with the IEEE 802.11 WLAN option.............................. 95
4.1 Generating a 160 MHz 2x2 WLAN 802.11ax signal...................................................95
4.2 Generating a 3x3 MIMO WLAN 802.11n signal with a R&S SMW for transmitter
tests..............................................................................................................................96
4.3 Generating a realistic MxN MIMO WLAN 802.11n/ac/p signal for receiver test
under static conditions...............................................................................................99
4.4 Generating a realistic MxN MIMO WLAN 802.11n/ac/p signal for receiver test
under real word conditions...................................................................................... 101
5 Signal control and signal characteristics........................................102
5.1 Filter/clipping settings..............................................................................................102
5.1.1 Filter settings...............................................................................................................102
5.1.2 Clipping settings..........................................................................................................105
5.2 Trigger settings......................................................................................................... 106
5.3 Marker settings.......................................................................................................... 111
5.4 Clock settings............................................................................................................115
5.5 Local and global connectors settings.....................................................................117
6 Remote-control commands...............................................................118
6.1 Programming examples............................................................................................119
6.1.1 Trigger settings............................................................................................................119
6.1.2 Marker settings............................................................................................................121

Contents
R&S®SMW-K54/-K86/-K142/-K147
5User Manual 1175.6749.02 ─ 27
6.1.3 Clock settings..............................................................................................................121
6.2 General commands...................................................................................................122
6.3 Filter/clipping settings..............................................................................................125
6.4 Trigger settings......................................................................................................... 131
6.5 Marker settings..........................................................................................................137
6.6 Clock settings............................................................................................................141
6.7 Antenna configuration settings............................................................................... 142
6.8 Frame block configuration....................................................................................... 145
6.9 Frame configuration settings...................................................................................152
6.9.1 Frame block PPDU configuration................................................................................152
6.9.2 EHT/HE configuration................................................................................................. 168
6.9.3 User configuration....................................................................................................... 176
6.9.4 MPDU configuration.................................................................................................... 180
6.9.5 MAC header configuration.......................................................................................... 182
6.9.6 Beacon configuration.................................................................................................. 203
6.9.7 Spatial mapping configuration..................................................................................... 211
Glossary: Application notes and white papers............................... 214
List of commands.............................................................................. 215
Index....................................................................................................222

Contents
R&S®SMW-K54/-K86/-K142/-K147
6User Manual 1175.6749.02 ─ 27

Welcome to the IEEE 802.11 WLAN digital standard
R&S®SMW-K54/-K86/-K142/-K147
7User Manual 1175.6749.02 ─ 27
1 Welcome to the IEEE 802.11 WLAN digital
standard
The options R&S SMW-K54/-K86/-K142/-K147 are firmware applications that add func-
tionality to generate signals in accordance with the wireless LAN standards
IEEE 802.11a/b/g/n/ac/p/j/ax/be. Table 1-1 provides an overview.
Table 1-1: Options and IEEE 802.11 standard
Option WLAN standard
R&S SMW-K54 IEEE 802.11a/b/g/n/p/j
R&S SMW-K86 IEEE 802.11ac
R&S SMW-K142 IEEE 802.11ax
R&S SMW-K147 IEEE 802.11be
For a detailed overview on required options and the WLAN technology, see Chapter 2,
"About the IEEE 802.11 WLAN options", on page 12.
This user manual contains a description of the functionality that the application pro-
vides, including remote control operation.
All functions not discussed in this manual are the same as in the base unit and are
described in the R&S SMW user manual. The latest version is available at:
www.rohde-schwarz.com/manual/SMW200A
Installation
You can find detailed installation instructions in the delivery of the option or in the
R&S SMW service manual.
1.1 Key features
The R&S SMW-K54/-K86/-K142/-K147 options support all mandatory and almost all
optional features of related IEEE 802.11 standards. The following list gives an overview
of the main features:
●Support of up to eight Tx antennas
●Support of transmission bandwidths from 20 MHz to 320 MHz, see
●80 MHz and 160 MHz bandwidth with option R&S SMW-K86/-K142
●Support of all three operation modes: Legacy, Mixed Mode and Green Field
●Support of all legacy transmission modes (L-10 MHz, L-20 MHz, L-Duplicate, L-
Upper, L-Lower)
●Support of all 11n transmission modes (HT-20 MHz, HT-40 MHz, HT-Duplicate, HT-
Upper, HT-Lower)
●Support of all 11ac transmission modes with option R&S SMW-K86:
Key features

Welcome to the IEEE 802.11 WLAN digital standard
R&S®SMW-K54/-K86/-K142/-K147
8User Manual 1175.6749.02 ─ 27
VHT-20 MHz, VHT-40 MHz, VHT-80 MHz, VHT-80+80 MHz, VHT-160 MHz
●Support of all 11ax transmission modes with option R&S SMW-K142:
HE-20 MHz, HE-40 MHz, HE-80 MHz, HE-80+80 MHz, HE-160 MHz
●Support of all 11be transmission modes with option R&S SMW-K147:
EHT-20 MHz, EHT-40 MHz, EHT-80 MHz, EHT-80+80 MHz, EHT-160 MHz,
EHT-320 MHz
●Additional support of the CCK and PBCC frames in accordance with
IEEE 820.11a/b/g standard
●Support of Space Time Block Coding (STBC) and Spatial Multiplexing
●Up to 8 spatial streams in all supported channel widths
●Multi-User MIMO available with 2 or more total spatial streams
●Configurable number of spatial streams, space time streams and additional spatial
streams,
●Configurable modulation per spatial stream
●Support of short guard interval
●Configurable state of the scramble, interleaver, time domain windowing and chan-
nel coding
●Configurable PPDU, MAC header and FCS
●Integrated frame block concept for the generation of sequence of cascaded frame
blocks with different configurations and data rates
●Support of simple diversity and MIMO tests (frequency flat MIMO channel simula-
tion) without additional channel simulator
●Simulation of real-time MIMO channel condition for instruments equipped with the
fading options R&S SMW-K74/-B14(x2)
●Support of up to 37 users in 802.11ax trigger frame user info field
1.2 Accessing the IEEE 802.11 WLAN dialog
To open the dialog with IEEE 802.11 WLAN settings
► In the block diagram of the R&S SMW, select "Baseband > IEEE 802.11".
A dialog box opens that displays the provided general settings.
The signal generation is not started immediately. To start signal generation with the
default settings, select "State > On".
1.3 What's new
This manual describes firmware version FW 5.20.043.xx and later of the
R&S®SMW200A.
What's new

Welcome to the IEEE 802.11 WLAN digital standard
R&S®SMW-K54/-K86/-K142/-K147
9User Manual 1175.6749.02 ─ 27
Compared to the previous version there are editorial changes only.
1.4 Documentation overview
This section provides an overview of the R&S SMW user documentation. Unless speci-
fied otherwise, you find the documents at:
www.rohde-schwarz.com/manual/smw200a
1.4.1 Getting started manual
Introduces the R&S SMW and describes how to set up and start working with the prod-
uct. Includes basic operations, typical measurement examples, and general informa-
tion, e.g. safety instructions, etc. A printed version is delivered with the instrument.
1.4.2 User manuals and help
Separate manuals for the base unit and the software options are provided for down-
load:
●Base unit manual
Contains the description of all instrument modes and functions. It also provides an
introduction to remote control, a complete description of the remote control com-
mands with programming examples, and information on maintenance, instrument
interfaces and error messages. Includes the contents of the getting started manual.
●Software option manual
Contains the description of the specific functions of an option. Basic information on
operating the R&S SMW is not included.
The contents of the user manuals are available as help in the R&S SMW. The help
offers quick, context-sensitive access to the complete information for the base unit and
the software options.
All user manuals are also available for download or for immediate display on the Inter-
net.
1.4.3 Tutorials
The R&S SMW provides interactive examples and demonstrations on operating the
instrument in form of tutorials. A set of tutorials is available directly on the instrument.
1.4.4 Service manual
Describes the performance test for checking compliance with rated specifications, firm-
ware update, troubleshooting, adjustments, installing options and maintenance.
Documentation overview

Welcome to the IEEE 802.11 WLAN digital standard
R&S®SMW-K54/-K86/-K142/-K147
10User Manual 1175.6749.02 ─ 27
The service manual is available for registered users on the global Rohde & Schwarz
information system (GLORIS):
https://gloris.rohde-schwarz.com
1.4.5 Instrument security procedures
Deals with security issues when working with the R&S SMW in secure areas. It is avail-
able for download on the internet.
1.4.6 Printed safety instructions
Provides safety information in many languages. The printed document is delivered with
the product.
1.4.7 Data sheets and brochures
The data sheet contains the technical specifications of the R&S SMW. It also lists the
options and their order numbers and optional accessories.
The brochure provides an overview of the instrument and deals with the specific char-
acteristics.
See www.rohde-schwarz.com/brochure-datasheet/smw200a
1.4.8 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 software makes use of several valuable open source software packages. An open-
source acknowledgment document provides verbatim license texts of the used open
source software.
See www.rohde-schwarz.com/firmware/smw200a
1.4.9 Application notes, application cards, white papers, etc.
These documents deal with special applications or background information on particu-
lar topics.
See www.rohde-schwarz.com/application/smw200a and www.rohde-schwarz.com/
manual/smw200a
Documentation overview

Welcome to the IEEE 802.11 WLAN digital standard
R&S®SMW-K54/-K86/-K142/-K147
11User Manual 1175.6749.02 ─ 27
1.4.10 Videos
Find various videos on Rohde & Schwarz products and test and measurement topics
on YouTube: https://www.youtube.com/@RohdeundSchwarz
On the menu bar, search for your product to find related videos.
Figure 1-1: Product search on YouTube
1.5 Scope
Tasks (in manual or remote operation) that are also performed in the base unit in the
same way are not described here.
In particular, it includes:
●Managing settings and data lists, like saving and loading settings, creating and
accessing data lists, or accessing files in a particular directory.
●Information on regular trigger, marker and clock signals and filter settings, if appro-
priate.
●General instrument configuration, such as checking the system configuration, con-
figuring networks and remote operation
●Using the common status registers
For a description of such tasks, see the R&S SMW user manual.
1.6 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 instal-
led. Thus, some functions shown in the screenshots may not be available in your par-
ticular product configuration.
Notes on screenshots

About the IEEE 802.11 WLAN options
R&S®SMW-K54/-K86/-K142/-K147
12User Manual 1175.6749.02 ─ 27
2 About the IEEE 802.11 WLAN options
2.1 Required options
The basic equipment layout for generating IEEE 802.11 WLAN signals includes:
●Standard or wideband baseband generator (R&S SMW-B10/-B9)
●Baseband main module (R&S SMW-B13) or wideband baseband main module
(R&S SMW-B13XT)
●Frequency option (e.g. R&S SMW-B1003)
●Option IEEE 802.11a/b/g/n (R&S SMW-K54) per signal path
●Optional, option IEEE 802.11ac (R&S SMW-K86) per signal path
●Optional, option IEEE 802.11ax (R&S SMW-K142) per signal path
●Optional, option IEEE 802.11be (R&S SMW-K147) per signal path
You can generate signals via play-back of waveform files at the signal generator. To
create the waveform file using R&S WinIQSIM2, you do not need a specific option.
To play back the waveform file at the signal generator, you have two options:
●Install the R&S WinIQSIM2 option of the digital standard, e.g. R&S SMW-K255 for
playing LTE waveforms
●If supported, install the real-time option of the digital standard, e.g. R&S SMW-K55
for playing LTE waveforms
For more information, see data sheet.
2.2 About IEEE 802.11 WLAN technology
IEEE 802.11n is the extension of the WLAN IEEE 802.11a/g standard to nominal peak
data rates of 600 Mbps. Like IEEE 802.11a/g, IEEE 802.11n is also based on OFDM.
Also, IEEE 802.11n uses MIMO technology, up to 40 MHz bandwidth and special cod-
ing for increased throughput. The extension towards higher data rates is also known as
high throughput mode (HT mode) of 802.11n. The non-HT mode can be seen as the
part of 802.11n, which is backwards compatible to EEE 802.11a/g.
IEEE 802.11p is another extension to the WLAN IEEE 802.11a/g standard for the
usage of wireless access in vehicular environment, e.g. Car-to-Car (C2C), Vehicle-to-
Vehicle (V2V), intelligent transport systems (ITS).
IEEE 802.11ac further extends 802.11n to nominal peak data rates of 6240.0 Mbps.
Like IEEE 802.11a/g/n, IEEE 802.11ac is also based on OFDM. Also, IEEE 802.11ac
uses MIMO technology, up to 160 MHz bandwidth and special coding for increased
throughput. The extension towards higher data rates is also known as very high
throughput (VHT) mode of 802.11ac.
About IEEE 802.11 WLAN technology

About the IEEE 802.11 WLAN options
R&S®SMW-K54/-K86/-K142/-K147
13User Manual 1175.6749.02 ─ 27
IEEE 802.11ax is aimed to improve the user experience and network performance in
dense deployments in the 2.4 GHz and 5 GHz band. It supports uplink and downlink
multi user MIMO and up to 160 MHz bandwidth. It is based on OFDM and OFDMA
modulation.
IEEE 802.11be further extends IEEE 802.11ax offering frequency bands at 2.4 GHz,
5 GHz and 6 GHz. It supports uplink and downlink multi-user MIMO and up to 320 MHz
bandwidth. It is also based on OFDM and OFDMA modulation.
A short comparison between the IEEE 802.11 standards is provided in Table 2-1 and
Table 2-2. Also, further reading links provide more detailed information about technol-
ogy and application of the IEEE 802.11 standards.
Table 2-1: Overview 802.11n, 802.11ac, 802.11ax and 802.11be*
Parameters 802.11n 802.11ac 802.11ax 802.11be
Frequency bands 2.4 GHz, 5 GHz 2.4 GHz, 5 GHz 2.4 GHz, 5 GHz 2.4 GHz, 5 GHz,
6 GHz
Channel bandwidth
(MHz)
20, 40 20, 40, 80, 80+80,
160
20, 40, 80, 80+80,
160
20, 40, 80, 80+80,
160, 320
Subcarrier spacing
(kHz)
312.5 312.5 78.125 78.125
Symbol time (us) 3.2 3.2 12.8 12.8
Cyclic prefix (us) 0.8 0.8, 0.4 0.8, 1.6, 3.2 0.8, 1.6, 3.2
Transmission tech-
nology
SISO, SU-MIMO SISO, SU-MIMO,
MU-MIMO
SISO, SU-MIMO,
MU-MIMO
SISO, SU-MIMO,
MU-MIMO
MU-MIMO Downlink Uplink and down-
link
Uplink and down-
link
Modulation OFDM OFDM OFDM, OFDMA OFDM, OFDMA
Data subcarrier
modulation
BPSK, QPSK,
16QAM, 64QAM
BPSK, QPSK,
16QAM, 64QAM,
256QAM
BPSK, QPSK,
16QAM, 64QAM,
256QAM,
1024QAM
BPSK, QPSK,
16QAM, 64QAM,
256QAM,
1024QAM,
4096QAM
Coding BCC (mandatory)
LDPC (optional)
BCC (mandatory)
LDPC (optional)
BCC (mandatory)
LDPC (mandatory)
BCC (mandatory)
LDPC (mandatory)
Max. data rate
(Mbit/s)
600 6933
Further reading 1MA179 1MA192, 1GP94 1MA222, 1GP115 -
Table 2-2: Overview 802.11a, 802.11b, 802.11g, 802.11j and 802.11p
Parameters 802.11a 802.11b 802.11g 802.11j 802.11p
Frequency bands 5 GHz 2.4 GHz 2.4 GHz,
5 GHz
4.9 GHz to
5.0 GHz
5.85 GHz to
5.925 GHz
Channel bandwidth
(MHz)
20 20 20 10, 20 10, 20
About IEEE 802.11 WLAN technology

About the IEEE 802.11 WLAN options
R&S®SMW-K54/-K86/-K142/-K147
14User Manual 1175.6749.02 ─ 27
Parameters 802.11a 802.11b 802.11g 802.11j 802.11p
Subcarrier spacing
(kHz)
312.5 312.5 312.5 312.5 312.5
Symbol time (us) 3.2 3.2 3.2 3.2 3.2
Cyclic prefix (us) 0.8 0.8 0.8 0.8 0.8
Transmission tech-
nology
SISO SISO SISO SISO SISO
Modulation OFDM DSSS DSSS, OFDM OFDM OFDM,
OFDMA
Data subcarrier
modulation
BPSK, QPSK,
16QAM,
64QAM
CCK, PBCC CCK, PBCC,
BPSK, QPSK,
16QAM,
64QAM
BPSK, QPSK,
16QAM,
64QAM
BPSK, QPSK,
16QAM,
64QAM
Coding BCC (manda-
tory)
LDPC
(optional)
BCC (manda-
tory)
LDPC
(optional)
BCC (manda-
tory)
LDPC (manda-
tory)
BCC (manda-
tory)
LDPC (manda-
tory)
BCC (manda-
tory)
LDPC (manda-
tory)
Max. data rate
(Mbit/s)
54 11 54
Further reading 1MA69,
1GP56
1MA69,
1GP56
1MA69,
1GP56
1MA69,
1GP56
1MA152
2.3 Operation modes
The IEEE 802.11n standard defined the following three operation modes:
●Legacy mode
This mode is provided for backwards compatibility with the IEEE 802. a/g standard.
The mode is also known as Non-HT mode.
●Mixed Mode
A legacy preamble and header (L-STF, L-LTF and L-SIG) are wrapping the HT part
of the frame so that the frame is complying with OFDM-PHY and ERP-OFDM-PHY
corresponding to 802.11 a/g respectively.
●Green Field
In this mode, frames are being transmitted in a new high throughput format that
does not comply with the legacy mode. Green Field is an optional mode.
Figure 2-1 shows the packet formats of the different operation modes that can be trig-
gered by a device supporting the IEEE 802.11n standard.
Operation modes

About the IEEE 802.11 WLAN options
R&S®SMW-K54/-K86/-K142/-K147
15User Manual 1175.6749.02 ─ 27
3
2
1
Figure 2-1: PLCP packet format for IEEE 802.11n
1 = Operation mode "Legacy"
2 = Operation mode "Mixed Mode"
3 = Operation mode "Green Field"
The Table 2-3 gives an overview of the frequency domain operation modes of the
physical layer. Note that the duplicate mode corresponds to repeating the same com-
plex numbers modulating the subcarriers of the upper channel on the lower channel.
Table 2-3: Frequency domain PHY operation
LM Legacy mode as in IEEE 802.11a/g
Also, the CCK and the PBCC frames as in IEEE 802.11b/g
HT-Mode Frequency: 20 MHz and 40 MHz, 1 to 4 spatial streams (HT Duplicate Mode
included)
Duplicate Non-HT mode IEEE 802.11a OFDM-PHY format, 20 MHz and 40 MHz dual operation, upper
channel rotated by 90˚ relative to lower channel
Upper mode Non-HT/HT frame in the upper 20 MHz channel
Lower mode Non-HT/HT frame in the lower 20 MHz channel
VHT-Mode Requires R&S SMW-K86.
Frequency 20 MHz, 40 MHz, 80 MHz, 160 MHz, 1...8 spatial streams
HE mode Requires R&S SMW-K142.
Frequency 20 MHz, 40 MHz, 80 MHz, 160 MHz, 1...8 spatial streams
EHT mode Requires R&S SMW-K147.
Frequency 320 MHz, 1 to 16 spatial streams
When operating in the OFDM 20 MHz mode, there are 64 subcarriers available; the
migration to 40 MHz mode offers 128 subcarriers with the same frequency spacing of
312.5 KHz. 80 MHz bandwidth is using 256 subcarriers, keeping the original frequency
spacing. With 160 MHz bandwidth 512 subcarriers apply.
For IEEE 802.11ax in the OFDMA frequency allocation, the resource units (RU) may
contain 26, 52, 106, 242, 484 or 996 tones (aka subcarriers) and are in fixed locations.
The tones/subcarriers in the resource units are adjacent and contiguous except in the
middle of the channel where DC null carriers are present.
Operation modes

About the IEEE 802.11 WLAN options
R&S®SMW-K54/-K86/-K142/-K147
16User Manual 1175.6749.02 ─ 27
2.4 Signal generation
The generation of an IEEE 802.11n/ac/ax signal is done in multiple steps. In high
throughput (HT) and very high throughput (VHT) modes, the data of a single user is
specially coded and transmitted via up to eight Tx antennas.
In this implementation, the mapping of the Tx antennas' signals to the output paths of
the instrument can be configured. This function can be used for the simulation of fre-
quency flat MIMO channel, i.e. one carrier analysis like BER tests for instance. Another
application of the configurable mapping is the possibility to generate a combined signal
from different antennas if there is one path instrument or limited number of baseband
paths.
Refer to Figure 2-2 for an overview of the signal flow for generation of such a signal in
HT mode.
Figure 2-2: IEEE 802.11 n/ac/ax transmission chain
Signal generation

WLAN configuration and settings
R&S®SMW-K54/-K86/-K142/-K147
17User Manual 1175.6749.02 ─ 27
3 WLAN configuration and settings
Access:
► Select "Baseband > IEEE 802.11".
The remote commands required to define these settings are described in Chapter 6,
"Remote-control commands", on page 118.
●General settings......................................................................................................17
●Transmit antenna setup.......................................................................................... 21
●Frame block configuration.......................................................................................23
●PPDU configuration.................................................................................................30
●A-MPDU settings.....................................................................................................60
●MAC header and FCS configuration for frame block.............................................. 62
●MAC header HT/HE and VHT configuration........................................................... 81
●Spatial mapping...................................................................................................... 91
3.1 General settings
Access:
► Select "Baseband > IEEE 802.11".
This dialog provides settings to configure default settings, "Save/Recall" settings
and settings to configure the transmission bandwidth.
Also, it displays the sample rate and provides access to settings to configure trans-
mit antennas, baseband filters and clipping.
Settings
State..............................................................................................................................18
Set to Default................................................................................................................ 18
Save/Recall...................................................................................................................19
Generate Waveform File............................................................................................... 20
Transmission Bandwidth............................................................................................... 20
General settings

WLAN configuration and settings
R&S®SMW-K54/-K86/-K142/-K147
18User Manual 1175.6749.02 ─ 27
Sample Rate................................................................................................................. 20
Transmit Antennas Setup..............................................................................................20
Filter/Clipping Settings.................................................................................................. 20
State
Activates the standard and deactivates all the other digital standards and digital modu-
lation modes in the same path.
Remote command:
[:SOURce<hw>]:BB:WLNN:STATe on page 124
Set to Default
Calls the default settings. The values of the main parameters are listed in the following
table.
Parameter Value
General parameters
"State" Not affected by "Set to Default"
"Transmission Bandwidth" 20 MHz
"Configure Baseband B from Baseband A" Off
"Tx Antennas" 1
"Filter" Cosine
"Clipping" Off
Frame blocks configuration
"Frame Blocks" 1
"Frame Block Type" DATA
"Frame Blocks State" On
"Physical Mode" Mixed mode
"Tx Mode" HT-20 MHz
"Frames" 1
"Idle Time" 0.1 ms
"Data Source" PN9
TX antenna setup
"Antennas" 1
"Mapping Coordinates" Cartesian
"Output" First set "Baseband", rest is set to Off
"Matrix Elements" ("Real", "Imaginary", "Magnitude",
"Phase")
All zero but diagonal = 1
PPDU configuration
"Spatial Streams" 1
General settings

WLAN configuration and settings
R&S®SMW-K54/-K86/-K142/-K147
19User Manual 1175.6749.02 ─ 27
Parameter Value
"Space Time Streams" 1
"Extended Spatial Streams" 0
"Space Time Block Coding" inactive
Parameter value
"MCS" 1
"Data Rate (Mbps)" 13
"Data Bits Per Symbol" 52
"Stream 1" QPSK
"Channel Coding" BCC
"Coding Rate" ½
"Guard" Long
"Data Length" 1024 bytes
"Number of Data Symbols" 158
"Scrambler" "ON (user init)"
"Scrambler Init" 01
"Interleaver Active" ON
"Service Field" 0000
"Time Domain Windowing Active" On
"Transition Time" 100 ns
"Preamble/Header Active" ON
"Smoothing" ON
Spatial mapping
"Mode" Spatial expansion
"Index k" 20
Remote command:
[:SOURce<hw>]:BB:WLNN:PRESet on page 122
Save/Recall
Accesses the "Save/Recall" dialog, that is the standard instrument function for saving
and recalling the complete dialog-related settings in a file. The provided navigation
possibilities in the dialog are self-explanatory.
The settings are saved in a file with predefined extension. You can define the filename
and the directory, in that you want to save the file.
See also, chapter "File and Data Management" in the R&S SMW user manual.
General settings

WLAN configuration and settings
R&S®SMW-K54/-K86/-K142/-K147
20User Manual 1175.6749.02 ─ 27
Remote command:
[:SOURce<hw>]:BB:WLNN:SETTing:CATalog? on page 122
[:SOURce<hw>]:BB:WLNN:SETTing:LOAD on page 123
[:SOURce<hw>]:BB:WLNN:SETTing:STORe on page 123
[:SOURce<hw>]:BB:WLNN:SETTing:DELete on page 123
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:WLNN:WAVeform:CREate on page 124
Transmission Bandwidth
Selects the transmission bandwidth.
You can set the transmission bandwidth independent from the configuration of frame
blocks. If invalid settings in frame blocks occur, a warning message is displayed.
Click "Ok" to resolve invalid settings, corresponding parameters are set automatically
to their default values.
Remote command:
[:SOURce<hw>]:BB:WLNN:BWidth on page 122
Sample Rate
Displays the sample rate of the signal specific for the selected bandwidth.
Remote command:
[:SOURce<hw>]:BB:WLNN:SRATe? on page 130
Transmit Antennas Setup
Accesses the dialog for configuring the TX antennas, see Chapter 3.2, "Transmit
antenna setup", on page 21.
Remote command:
n.a.
Filter/Clipping Settings
Accesses the dialog for setting baseband filtering and clipping, see Chapter 5.1, "Filter/
clipping settings", on page 102.
General settings