Signal Reception

Functions for 802.11™ physical layer reception processing

WLAN Toolbox™ provides functions that synchronize, demodulate, and decode 802.11 waveforms. Use these functions to detect waveform characteristics, estimate and correct for symbol timing offset, estimate and correct for carrier frequency offset, and estimate the channel. The functions also demodulate and recover individual preamble and data fields.

Functions

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wlanPacketDetectOFDM packet detection using L-STF
wlanFormatDetectDetect packet format
wlanSymbolTimingEstimateFine symbol timing estimate using L-LTF
wlanCoarseCFOEstimateCoarse estimate of carrier frequency offset
wlanFineCFOEstimateFine estimate of carrier frequency offset
wlanSampleRateReturn nominal sample rate
channelDelayChannel timing delay
wlanVHTLTFChannelEstimateChannel estimation using VHT-LTF
wlanHTLTFChannelEstimateChannel estimation using HT-LTF
wlanLLTFChannelEstimateChannel estimation using L-LTF
wlanFieldIndicesGenerate PPDU field indices
wlanHEDemodulateDemodulate fields of HE waveform
wlanDMGOFDMDemodulateDemodulate fields of DMG waveform
wlanS1GDemodulateDemodulate fields of S1G waveform
wlanVHTLTFDemodulateDemodulate VHT-LTF waveform
wlanHTLTFDemodulateDemodulate HT-LTF waveform
wlanLLTFDemodulateDemodulate L-LTF waveform
wlanHEOFDMInfoGet OFDM information for HE transmission
wlanDMGOFDMInfoGet OFDM information for DMG transmission
wlanS1GOFDMInfoGet OFDM Information for S1G transmission
wlanVHTOFDMInfoGet OFDM information for VHT transmission
wlanHTOFDMInfoReturn OFDM information for HT transmission
wlanNonHTOFDMInfoGet OFDM information for non-HT transmission
interpretHESIGABitsUpdate recovery configuration object with HE-SIG-A bits
getSIGBLengthReturn information relevant to HE-SIG-B field length
wlanFieldIndicesGenerate PPDU field indices
wlanHESIGABitRecoverRecover information bits in HE-SIG-A field
wlanHESIGBCommonBitRecoverRecover common field bits in HE-SIG-B field
wlanHESIGBUserBitRecoverRecover user field bits in HE-SIG-B field
wlanLSIGBitRecoverRecover information bits in L-SIG field
wlanLSIGRecoverRecover L-SIG information bits
wlanVHTSIGARecoverRecover VHT-SIG-A information bits
wlanVHTSIGBRecoverRecover VHT-SIG-B information bits
wlanHTSIGRecoverRecover HT-SIG information bits
wlanDMGHeaderBitRecoverRecover header bits from DMG header field
wlanFieldIndicesGenerate PPDU field indices
wlanVHTDataRecoverRecover VHT data
wlanHTDataRecoverRecover HT data
wlanNonHTDataRecoverRecover non-HT data
wlanDMGDataBitRecoverRecover data bits from DMG data field
wlanHEDataBitRecoverRecover data bits from HE-Data field
wlanScrambleScramble and descramble binary input sequence
wlanConstellationDemapConstellation demapping
wlanBCCDeinterleaveDeinterleave binary convolutionally interleaved input
wlanStreamDeparseStream-deparse binary input
wlanSegmentDeparseBitsSegment-deparse data bits
wlanSegmentParseSymbolsSegment-parse data subcarriers
wlanBCCDecodeConvolutionally decode input data
wlanGolaySequenceGenerate Golay sequence

Objects

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comm.PhaseFrequencyOffsetApply phase and frequency offsets to input signal
wlanHERecoveryConfigCreate HE recovery configuration object

Topics

Basic VHT Data Recovery Steps

Perform basic VHT data recovery.

Featured Examples

Recover and Analyze Packets in 802.11ax Waveform

Recover and Analyze Packets in 802.11ax Waveform

Blindly detects, decodes, and analyzes multiple IEEE 802.11a™ and IEEE 802.11ax™ packets in a waveform. The example provides a summary of the detected packets and displays the MAC contents, error vector magnitude (EVM), power, and signaling information for a selected packet.

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802.11ax Packet Error Rate Simulation for Single User Format

802.11ax Packet Error Rate Simulation for Single User Format

Measure the packet error rate of an IEEE® 802.11ax™ high efficiency (HE) single user format link.

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802.11ax Downlink OFDMA and Multi-User MIMO Throughput Simulation

802.11ax Downlink OFDMA and Multi-User MIMO Throughput Simulation

The transmit and receive processing for an IEEE® 802.11ax™ multi-user downlink transmission over a TGax indoor fading channel. Three transmission modes are simulated: OFDMA, MU-MIMO, and a combination of OFDMA and MU-MIMO.

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Recovery Procedure for an 802.11ax Packet

Recovery Procedure for an 802.11ax Packet

Detect a packet and decode payload bits in a received IEEE® 802.11ax™ waveform. The receiver recovers the packet format parameters from the preamble fields to decode the data field and the MAC frame.

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802.11ad Packet Error Rate Single Carrier PHY Simulation with TGay Channel

802.11ad Packet Error Rate Single Carrier PHY Simulation with TGay Channel

Measure the packet error rate of an IEEE® 802.11ad™ DMG single carrier (SC) PHY link using an end-to-end simulation.

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802.11ac Multi-User MIMO Precoding

802.11ac Multi-User MIMO Precoding

The transmit and receive processing for a 802.11ac™ multi-user downlink transmission over a fading channel. The example uses linear precoding techniques based on a singular-value-decomposition (SVD) of the channel.

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802.11ac Packet Error Rate Simulation for 8x8 TGac Channel

802.11ac Packet Error Rate Simulation for 8x8 TGac Channel

Measure the packet error rate of an IEEE® 802.11ac™ VHT link using an end-to-end simulation with a fading TGac channel model and additive white Gaussian noise.

Open Script
Recovery Procedure for an 802.11ac Packet

Recovery Procedure for an 802.11ac Packet

Detect a packet and decode payload bits in a received IEEE® 802.11ac™ VHT waveform. The receiver recovers the packet format parameters from the preamble fields to decode the data.

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802.11ah Packet Error Rate Simulation for 2x2 TGah Channel

802.11ah Packet Error Rate Simulation for 2x2 TGah Channel

Measure the packet error rate of an IEEE® 802.11ah™ S1G short preamble link using an end-to-end simulation with a fading TGah indoor channel model and additive white Gaussian noise.

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802.11n Packet Error Rate Simulation for 2x2 TGn Channel

802.11n Packet Error Rate Simulation for 2x2 TGn Channel

Measure the packet error rate of an IEEE® 802.11n™ HT link using an end-to-end simulation with a fading TGn channel model and additive white Gaussian noise.

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802.11 OFDM Beacon Receiver with Captured Data

802.11 OFDM Beacon Receiver with Captured Data

A receiver design that is able to recover 802.11™ OFDM beacon packets in non-HT format transmitted over the air from commercial 802.11 hardware. Beacon packets are typically transmitted in non-HT format, even for HT [ 1 ], VHT [ 1 ], and/or HE [ 2 ] capable hardware. Packet information such as SSID is printed to the command-line during recovery.

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Joint Sampling Rate and Carrier Frequency Offset Tracking

Joint Sampling Rate and Carrier Frequency Offset Tracking

Demonstrates joint sampling rate and carrier frequency offset tracking in a WLAN receiver.

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