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Test & Measurement Application Card | 02.00 WLAN IEEE 802.11ac – wideband signal testing WLAN IEEE 802.11ac – wideband signal testing Offering bandwidths up to 160 MHz, the signal generators and analyzers from Rohde & Schwarz are ideal for testing IEEE 802.11ac signals 256QAM modulation, for instance, requires a maximum error vector magnitude (EVM) of –32 dB. Bandwidths of 80 + 80 MHz and 160 MHz present further challenges when designing IEEE 802.11ac devices. T & M solution Development of IEEE 802.11ac transmitters and receivers requires comprehensive testing, including flexible signal generation and accurate signal analysis. The complex sig- nal configurations and high modulation bandwidths call for state-of-the-art measurement equipment. Rohde & Schwarz signal generators and spectrum analyzers are ideal instru- ments for in-depth design analysis, precise measurements and fast localization of impairments in TX and RX paths. Receiver and component tests require reference signals with very low distortion. Rohde & Schwarz offers two vec- tor signal generators enabling IEEE 802.11ac compliant waveforms generation with 80 + 80 MHz and full 160 MHz bandwidth support. The new R&S®SMW200A is a high- end vector signal generator for highest demands on sig- nal quality with an EVM of –49 dB and 0.05 dB frequency response over 160 MHz bandwidth. The R&S®SMBV100A is the first mid-class vector signal generator offering 160 MHz bandwidth in a compact form factor. The gen- erator has very good signal purity with an EVM of –47 dB and a frequency response of 0.2 dB. Both instruments fea- ture a frame block sequencer that allows easy configura- tion and concurrent signal generation of all major WLAN IEEE 802.11 standards. This is particularly useful when testing DUTs supporting multiple IEEE 802.11 standards. Your task The WLAN IEEE 802.11ac standard aims to significantly in- crease data rates, opening up new use cases such as wire- less displays with HD quality. To achieve a higher through- put, IEEE 802.11ac has several new features, including a channel bandwidth of up to 160 MHz and 80 + 80 MHz. Further enhancements are 256QAM modulation and multiple input multiple output (MIMO) with up to eight spatial streams. These features enable data rates of up to 870 Mbit/s on a single spatial stream and 6.9 Gbit/s with eight spatial streams. The new signal features place high demands on the performance of WLAN devices in terms of modulation accuracy and adjacent channel leakage. R&S®FSW-K91ac option: convenient IEEE 802.11ac signal analysis. The R&S®SMW-K86 frame block sequencer option.

80 + 80 MHz and 160 MHz present further challenges wideband signal testing · 2016. 11. 30. · testing DUTs supporting multiple IEEE 802.11 standards. Your task The WLAN IEEE 802.11ac

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Page 1: 80 + 80 MHz and 160 MHz present further challenges wideband signal testing · 2016. 11. 30. · testing DUTs supporting multiple IEEE 802.11 standards. Your task The WLAN IEEE 802.11ac

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WLAN IEEE 802.11ac – wideband signal testingOffering bandwidths up to 160 MHz, the signal generators and analyzers from Rohde & Schwarz are ideal for testing IEEE 802.11ac signals

256QAM modulation, for instance, requires a maximum error vector magnitude (EVM) of –32 dB. Bandwidths of 80 + 80 MHz and 160 MHz present further challenges when designing IEEE 802.11ac devices.

T & M solutionDevelopment of IEEE 802.11ac transmitters and receivers requires comprehensive testing, including flexible signal generation and accurate signal analysis. The complex sig-nal configurations and high modulation bandwidths call for state-of-the-art measurement equipment. Rohde & Schwarz signal generators and spectrum analyzers are ideal instru-ments for in-depth design analysis, precise measurements and fast localization of impairments in TX and RX paths.

Receiver and component tests require reference signals with very low distortion. Rohde & Schwarz offers two vec-tor signal generators enabling IEEE 802.11ac compliant waveforms generation with 80 + 80 MHz and full 160 MHz bandwidth support. The new R&S®SMW200A is a high-end vector signal generator for highest demands on sig-nal quality with an EVM of –49 dB and 0.05 dB frequency response over 160 MHz bandwidth. The R&S®SMBV100A is the first mid-class vector signal generator offering 160 MHz bandwidth in a compact form factor. The gen-erator has very good signal purity with an EVM of –47 dB and a frequency response of 0.2 dB. Both instruments fea-ture a frame block sequencer that allows easy configura-tion and concurrent signal generation of all major WLAN IEEE 802.11 standards. This is particularly useful when testing DUTs supporting multiple IEEE 802.11 standards.

Your taskThe WLAN IEEE 802.11ac standard aims to significantly in-crease data rates, opening up new use cases such as wire-less displays with HD quality. To achieve a higher through-put, IEEE 802.11ac has several new features, including a channel bandwidth of up to 160 MHz and 80 + 80 MHz. Further enhancements are 256QAM modulation and multiple input multiple output (MIMO) with up to eight spatial streams. These features enable data rates of up to 870 Mbit/s on a single spatial stream and 6.9 Gbit/s with eight spatial streams.

The new signal features place high demands on the performance of WLAN devices in terms of modulation accuracy and adjacent channel leakage. R&S®FSW-K91ac option: convenient IEEE 802.11ac signal analysis.

The R&S®SMW-K86 frame block sequencer option.

WLAN_wideband_signal_testing_ac_en_3606-7501-92.indd 1 25.06.2013 12:27:32

Page 2: 80 + 80 MHz and 160 MHz present further challenges wideband signal testing · 2016. 11. 30. · testing DUTs supporting multiple IEEE 802.11 standards. Your task The WLAN IEEE 802.11ac

Rohde & Schwarz GmbH & Co. KG

Europe, Africa, Middle East | +49 89 4129 12345

[email protected]

North America | 1 888 TEST RSA (1 888 837 87 72)

[email protected]

Latin America | +1 410 910 79 88 | [email protected]

Asia/Pacific | +65 65 13 04 88 | [email protected]

China | +86 800 810 8228/+86 400 650 5896

[email protected]

www.rohde-schwarz.com

R&S® is a registered trademark of Rohde & Schwarz GmbH & Co. KG

Trade names are trademarks of the owners | Printed in Germany (as)

Version 02.00 | June 2013 | PD 3606.7501.92

R&S®WLAN IEEE 802.11ac – wideband signal testing

Data without tolerance limits is not binding | Subject to change

© 2013 Rohde & Schwarz GmbH & Co. KG | 81671 München, Germany

3606750192

Compact solutions from Rohde & Schwarz for IEEE 802.11ac signal generation and analysis

IEEE 802.11ac

DUT

RF RF

IEEE 802.11acDUT

RF RF

¸SMW200A¸FSW

High-end instruments with touchscreen operation for fast configuration of demanding measurement tasks in R & D

¸SMBV100A ¸FSV

Mid-class instruments for cost-effective verification and fast DUT tests in production

Key features and benefits of T & M solutions:Vector signal generators ❙ R&S®SMx-K86 firmware option: frame block sequencer for alternating legacy (11a/b/g), 11n or 11ac frames within one ARB waveform

❙ MIMO modes with up to 8 transmit antennas ❙ Realtime fading with bandwidths of up to 160 MHz in the R&S®SMW200A

❙ Excellent performance of up to –49 dB EVM and a fre-quency response of 0.05 dB

Signal and spectrum analyzers ❙ Very low residual EVM ❙ 160 MHz demodulation bandwidth ❙ Fast switching and measurement times ❙ Support of IEEE 802.11a/b/g/p, 11n and 11ac, spectral (ACLR, SEM, OBW, CCDF) and modulation accuracy (EVM) measurements

See alsowww.rohde-schwarz.com/technology/wlan

Application Notes802.11ac Technology Introduction:www.rohde-schwarz.com/appnote/1MA192Generating Signals for WLAN 802.11ac:www.rohde-schwarz.com/appnote/1GP94

Transmitter tests require spectral measurements such as ACLR and spurious emissions as well as modulation accuracy (e.g. EVM) and analysis of the signal content. Rohde & Schwarz signal and spectrum analyzers, such as the R&S®FSV and R&S®FSW, offer 160 MHz demodulation bandwidth to perform these tasks easily and accurately. Large touchscreens make signal configuration fast and easy and present comprehensive, clearly arranged mea-surement results.

The outstanding performance of the R&S®FSW high end spectrum analyzer permits the precise signal analysis nec-essary when characterizing DUTs. For a 160 MHz band-width and 256QAM modulation, the residual EVM is as low as –47 dB. The high speed of the spectrum analyzer enables fast measurements during conformance and verification tests. The EVM value of one frame can be ac-quired in about 35 ms.

With the R&S®FSV, Rohde & Schwarz was first to offer a mid-class spectrum analyzer with 160 MHz demodulation bandwidth as a cost-effective instrument for transmitter and component tests in R & D and production.

WLAN_wideband_signal_testing_ac_en_3606-7501-92.indd 2 25.06.2013 12:27:37


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