cfghe = wlanhauconfig;cfghe.channelbandwidth =“CBW20”；%通道带宽cfgHE。NumSpaceTimeStreams = 2;％空间流的数量cfghe.numtransmitantennas = 2;%发送天线数cfgHE。一个PEPLength = 1e3;%有效负载长度，以字节为单位cfgHE。ExtendedRange = false;％不使用扩展范围格式cfghe.upper106toneru = false;%不要使用高于106音RUcfghe.prehepatialmapping = false;预先田地的％空间映射cfgHE。GuardInterval = 0.8;保护间隔时间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

%创建并配置TGax通道chanBW = cfgHE.ChannelBandwidth;tgaxChannel = wlanTGaxChannel;tgaxChannel。DelayProfile ='model-b'；tgaxChannel。NumTransmitAntennas = cfgHE.NumTransmitAntennas;tgaxChannel。NumReceiveAntennas = 2;tgaxChannel。TransmitReceiveDistance = 5;对于nlos的百分米距离tgaxChannel。ChannelBandwidth = chanBW;tgaxChannel。LargeScaleFadingEffect =“没有”；fs = wlansamplerge（cfghe）;tgaxchannel.samplere = fs;

信噪比= 10:5:35;

maxnumerrors = 10;%一个信噪比点的最大包错误数maxnumpackets = 100;％SNR点的最大数据包数

numSNR =元素个数(信噪比);%信噪比点数packeterrorrate = zeros（1，numsnr）;%获取已占用子载波指标和OFDM参数Ofdminfo = wlanheofdminfo（'他是数据', cfgHE);%从PPDU中提取字段的索引IND = WLANFIELDINDIDICES（CFGHE）;%parfor isnr = 1:numSNR %使用“parfor”加速模拟为isnr = 1: numSNR％迭代设置随机子流索引，以确保每个%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);%创建一个AWGN信道实例每个SNR点模拟awgnChannel = comm.AWGNChannel;awgnChannel。NoiseMethod ='信噪比（SNR）'；awgnChannel。SignalPower = 1 / tgaxChannel.NumReceiveAntennas;%考虑噪声能量为零，因此信噪比定义为%活跃副载波awgnChannel。信噪比=信噪比(isnr) -10 * log10 (ofdmInfo.FFTLength / ofdmInfo.NumTones);％循环以模拟多个数据包numPacketErrors = 0;numPkt = 1;%发送的数据包索引而numPacketErrors < = maxNumErrors & & numPkt < = maxNumPackets％生成随机PSDU的数据包psduLength = getPSDULength (cfgHE);％PSDU长度为字节txPSDU = randi([0 1]，psduLength*8,1);tx = wlanWaveformGenerator (txPSDU cfgHE);添加尾随零以允许通道延迟txPad = [tx;0 (50, cfgHE.NumTransmitAntennas)];%通过衰落的室内TGax信道重置(tgaxChannel);用于不同实现的％重置通道rx = tgaxChannel (txPad);%将波形通过AWGN通道rx = awgnChannel (rx);％数据包检测并确定粗分组偏移量chanBW coarsePktOffset = wlanPacketDetect (rx);如果isempty (coarsePktOffset)％如果空不检测到L-STF;包错误numPacketErrors = numPacketErrors + 1;numPkt = numPkt + 1;继续；%进入下一个循环迭代结束%提取L-STF并进行粗频偏校正lstf = rx (coarsePktOffset + (ind.LSTF (1): ind.LSTF (2)),:);coarseFreqOff = wlanCoarseCFOEstimate (lstf chanBW);rx = helperFrequencyOffset (rx, fs -coarseFreqOff);％提取非HT字段并确定精细数据包偏移量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;%如果数据包被检测出，且从%通道建模;包错误如果pktoffset> 50 numpacketerrors = numpacketerrors + 1;numPkt = numPkt + 1;继续；%进入下一个循环迭代结束%提取L-LTF并进行精细的频率偏移校正rxLLTF = rx (pktOffset + (ind.LLTF (1): ind.LLTF (2)),:);fineFreqOff = wlanFineCFOEstimate (rxLLTF chanBW);rx = helperFrequencyOffset (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);(陈,飞行员)= heLTFChannelEstimate (heltfDemod cfgHE);%数据解调rxdata = rx（pktoffset +（ind.hedata（1）：Ind.hedata（2）），:);emodsym = wlanhedemodulate（rxdata，'他是数据', cfgHE);导频相位跟踪demodSym = heCommonPhaseErrorTracking (demodSym,成龙,cfgHE);估算HE领域的噪声功率据nvar = heNoiseEstimate (demodSym (ofdmInfo.PilotIndices,:,:),飞行员,cfgHE);％从解调的符号和通道中提取数据子载波%的估计demodDataSym = demodSym (ofdmInfo.DataIndices,:,);chanEstData =成龙(ofdmInfo.DataIndices,:,);%均衡和STBC合并[eqdatasym，csi] = heequalizeCombine（Demoddatasym，Chanestdata，Nvarest，Cfghe）;%恢复数据据nvar rxPSDU = wlanHEDataBitRecover (eqDataSym, 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packetErrorRate (isnr) = numPacketErrors / (numPkt-1);disp ([“主持人”num2str (cfgHE.MCS)'，'..．“信噪比”num2str（SNR（ISNR））..．“完成后”num2str (numPkt-1)“包”,..．'每：'num2str（packeterrorrate（ISNR））]）;结束

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