cfgHE = wlanHESUConfig;cfgHE。ChannelBandwidth =“CBW20”；通道带宽%cfgHE。NumSpaceTimeStreams = 2;%时空流个数cfgHE。numtransmitantenna = 2;%发射天线个数cfgHE。一个PEPLength = 1e3;负载长度(以字节为单位)cfgHE。ExtendedRange = false;不要使用扩展范围格式cfgHE。Upper106ToneRU = false;不使用106调以上的俄服cfgHE。PreHESpatialMapping = false;pre-HE字段的空间映射cfgHE。GuardInterval = 0.8;防护间隔时间%cfgHE。HELTFType = 4;HE-LTF压缩模式cfgHE。ChannelCoding =“方法”；%信道编码cfgHE。MCS = 3;调制和编码方案

创建和配置TGax通道chanBW = cfgh . channelbandwidth;tgaxChannel = wlanTGaxChannel;tgaxChannel。DelayProfile =“b型”；tgaxChannel。numtransmitantenna = cfgh . numtransmitantenna;tgaxChannel。numreceiveantenna = 2;tgaxChannel。TransmitReceiveDistance = 5;%距离(以米为单位)tgaxChannel。ChannelBandwidth = chanBW;tgaxChannel。LargeScaleFadingEffect =“没有”；tgaxChannel。NormalizeChannelOutputs = false;fs = wlanSampleRate(cfgHE);tgaxChannel。SampleRate = fs;

信噪比= 10:5:35;

maxNumErrors = 10;在一个信噪比点上的最大错误包数maxNumPackets = 100;一个信噪比点的最大包数

numSNR = numel(snr);信噪比百分比packketerrorrate = 0 (1,numSNR);获取占用子载波指数和OFDM参数ofdmInfo = wlanHEOFDMInfo(“数据”, cfgHE);%索引从PPDU中提取字段ind = wlanFieldIndices(cfgHE);%parfor isnr = 1:numSNR %使用'parfor'加快模拟速度为isnr = 1:numSNR每次迭代设置随机子流索引，以确保每个子流的索引迭代使用一组可重复的随机数流= RandStream(“combRecursive”，“种子”, 99);流。Substream = isnr;RandStream.setGlobalStream(流);%考虑噪声能量为空，因此信噪比定义为有源子载波百分比packetSNR = snr(isnr)-10*log10(ofdmInfo.FFTLength/ofdmInfo.NumTones);%循环模拟多个数据包numPacketErrors = 0;numPkt = 1;%发送的报文索引而numPacketErrors<=maxNumErrors && numPkt<=maxNumPackets生成一个随机PSDU的报文psduLength = getPSDULength(cfgHE);% PSDU长度，单位为字节txPSDU = randi([0 1]，psduLength*8,1);tx = wlanWaveformGenerator(txPSDU,cfgHE);添加尾随零以允许信道延迟txPad = [tx;0 (50, cfgHE.NumTransmitAntennas)];通过一个衰落的室内TGax通道重置(tgaxChannel);为不同的实现重置通道rx = txxchannel (txPad);通过AWGN通道传递波形rx = awgn(rx,packetSNR);包检测和确定粗包偏移coarsePktOffset = wlanPacketDetect(rx,chanBW);如果isempty (coarsePktOffset)%如果为空，未检测到L-STF;包错误numPacketErrors = numPacketErrors+1;numPkt = numPkt+1;继续；%转到下一次循环迭代结束提取L-STF并进行粗频偏校正lstf = rx(coarsePktOffset+(ind.LSTF(1):ind.LSTF(2))，:);粗freqoff = wlan粗secfoestimate (lstf,chanBW);rx = frequencyOffset(rx,fs，-粗freqoff);提取非ht字段并确定细包偏移量nonhtfields = rx(coarsePktOffset+(ind.LSTF(1):ind.LSIG(2))，:);finePktOffset = wlanSymbolTimingEstimate(nonhtfields,chanBW);确定最终数据包偏移量pktOffset = coarsePktOffset+finePktOffset;%如果检测到的数据包超出预期延迟范围%渠道建模;包错误如果pktOffset>50 numPacketErrors = numPacketErrors+1;numPkt = numPkt+1;继续；%转到下一次循环迭代结束提取L-LTF并执行精细的频偏校正rxLLTF = rx (pktOffset + (ind.LLTF (1): ind.LLTF (2)),:);fineFreqOff = wlanFineCFOEstimate(rxLLTF,chanBW);rx = frequencyOffset(rx,fs，-fineFreqOff);HE-LTF解调和信道估计rxHELTF = rx(pktOffset+(ind.HELTF(1):ind.HELTF(2))，:);heltfDemod = wlanHEDemodulate(rxHELTF，“HE-LTF”, cfgHE);[chanEst,pilotEst] = heLTFChannelEstimate(heltfDemod,cfgHE);数据解调rxData = rx(pktOffset+(ind.HEData(1):ind.HEData(2))，:);demodSym = wlanHEDemodulate(rxData，“数据”, cfgHE);导频相位跟踪demodSym = wlanHETrackPilotError(demodSym,chanEst,cfgHE，“数据”）;估计HE场的噪声功率nVarEst = heNoiseEstimate(demodSym(ofdmInfo.PilotIndices，:，:)，pilotEst,cfgHE);从解调的符号和信道中提取数据子载波%的估计demodDataSym = demodSym(ofdinfo . dataindices，:，:);chanEstData = chanEst(ofdinfo . dataindices，:，:);%平衡和STBC结合[eqDataSym,csi] = heEqualizeCombine(demodDataSym,chanEstData,nVarEst,cfgHE);%恢复数据rxPSDU = wlanHEDataBitRecover(eqDataSym,nVarEst,csi,cfgHE，“LDPCDecodingMethod”，“layered-bp”）;确定是否有任何位错误，即数据包错误。packetError = ~isequal(txPSDU,rxPSDU);numPacketErrors = numPacketErrors+packetError;numPkt = numPkt+1;结束计算信噪比点的包错误率(PER)packeterrors (isnr) = numPacketErrors/(numPkt-1);disp ([“主持人”num2str (cfgHE.MCS)'，'.．.“信噪比”num2str(信噪比(isnr)).．.“完成后”num2str (numPkt-1)“包”,.．.“每:”num2str (packetErrorRate (isnr))));结束

图;packetErrorRate semilogy(信噪比,“- *”）;持有在；网格在；包含(“信噪比(dB)”）;ylabel (“每”）;dataStr = arrayfun(@(x)sprintf(“MCS % d ', cfgHE x)。MCS,“UniformOutput”、假);传奇(dataStr);标题(sprintf (用于HE通道%s， %s， %s, PSDULength: %d的PER, cfgHE.ChannelBandwidth tgaxChannel.DelayProfile cfgHE.ChannelCoding cfgHE.APEPLength));