802.11 ax压缩波束形成包错误率模拟

NumTxAnts = 4;%的发送天线数量NumSTS = 2;%的时空流NumRxAnts = 2;%的接收天线cfgHEBase = wlanHESUConfig;cfgHEBase。ChannelBandwidth =“CBW20”;%通道带宽cfgHEBase。NumSpaceTimeStreams = NumSTS;%的时空流cfgHEBase。NumTransmitAntennas = NumTxAnts;%的发送天线数量cfgHEBase。APEPLength = 1 e3;%载荷长度字节cfgHEBase。ExtendedRange = false;%不使用扩展范围的格式cfgHEBase。Upper106ToneRU = false;%不使用上106语气俄文cfgHEBase。PreHESpatialMapping = false;%的空间映射pre-HE字段cfgHEBase。GuardInterval = 3.2;%警卫队间隔时间cfgHEBase。HELTFType = 4;% HE-LTF压缩模式cfgHEBase。ChannelCoding =“方法”;%信道编码cfgHEBase。MCS = 3;%调制和编码方案cfgHEBase。SpatialMapping =“自定义”;%的习俗波束形成

cfgNDP = cfgHEBase;cfgNDP。APEPLength = 0;%民主党没有数据cfgNDP。NumSpaceTimeStreams = NumTxAnts;%的反馈矩阵的计算cfgNDP。SpatialMapping =“直接”;%每个TxAnt携带一个STS

%创建和配置TGax通道chanBW = cfgHEBase.ChannelBandwidth;tgaxChannel = wlanTGaxChannel;tgaxChannel。DelayProfile =“b型”;tgaxChannel。NumTransmitAntennas = NumTxAnts;tgaxChannel。NumReceiveAntennas = NumRxAnts;tgaxChannel。TransmitReceiveDistance = 5;%在米距离了仿真结果tgaxChannel。ChannelBandwidth = chanBW;tgaxChannel。LargeScaleFadingEffect =“没有”;tgaxChannel。NormalizeChannelOutputs = false;fs = wlanSampleRate (cfgHEBase);tgaxChannel。SampleRate = f;

codeBookSize =[0 1正];

信噪比= 10:2:18;

maxNumErrors = 10;%的最大数据包数量错误的信噪比maxNumPackets = 100;%的最大数据包数量的信噪比

numQuant =元素个数(codeBookSize);numSNR =元素个数(信噪比);%的信噪比点packetErrorRate = 0 (numQuant numSNR);%获得占领副载波指数和OFDM参数ofdmInfo = wlanHEOFDMInfo (“数据”,cfgHEBase);% PPDU指数提取字段印第安纳州= wlanFieldIndices (cfgHEBase);indSound = wlanFieldIndices (cfgNDP);为ibf = 1: numQuant开关codeBookSize (ibf)%见P802.11ax / 9.4.1.64 D4.1部分情况下0 NumBitsPsi = 2;%对psi的比特数NumBitsPhi = 4;%为φ的比特数disp (端到端模拟与压缩波束形成量化的);disp ([φ=的比特数的num2str (NumBitsPhi)…和ψ=的比特数num2str (NumBitsPsi)]);情况下1 NumBitsPsi = 4;%对psi的比特数NumBitsPhi = 6;%为φ的比特数disp (端到端模拟与压缩波束形成量化的);disp ([φ=的比特数的num2str (NumBitsPhi)…和ψ=的比特数num2str (NumBitsPsi)]);否则disp (与未压缩的端到端模拟波束形成的);结束% parfor isnr = 1: numSNR %使用parfor加快仿真为isnr = 1: numSNR%设置随机substream每迭代确保每个索引%迭代使用一组可重复的随机数字流= RandStream (“combRecursive”,“种子”,100);流。Substream = isnr;RandStream.setGlobalStream(流);%噪声能量占null信噪比是每个定义的%活跃副载波packetSNR =信噪比(isnr) -10 * log10 (ofdmInfo.FFTLength / ofdmInfo.NumTones);%创建他每信噪比配置对象的一个实例%的模拟。这将使使用parforcfgHE = cfgHEBase;%循环模拟多个数据包numPacketErrors = 0;numPkt = 1;%指数数据包传输而numPacketErrors < = maxNumErrors & & numPkt < = maxNumPackets%空数据包传输tx = wlanWaveformGenerator ([], cfgNDP);% 0添加到允许通道延迟txPad = [tx;0 (50,cfgNDP.NumTransmitAntennas)];%通过减弱室内TGax通道重置(tgaxChannel);%重置渠道不同的实现rx = tgaxChannel (txPad);%通过波形通过AWGN信道rx = awgn (rx, packetSNR);%计算beamformee指导矩阵V = heUserBeamformingFeedback (rx, cfgNDP,真);如果isempty (V)%用户反馈失败,包错误numPacketErrors = numPacketErrors + 1;numPkt = numPkt + 1;继续;%去下一个循环迭代结束如果~ isinf (codeBookSize (ibf))%找到量化角度波束形成的反馈矩阵angidx = bfCompressQuantize (V (: 1: NumSTS,:), NumBitsPhi, NumBitsPsi);%计算转向矩阵从量化的角度% beamformer:%假设零延迟传输量子化的角度%从beamformee beamformer,指导矩阵%计算,从量化的角度和使用的% beamformer的数据传输。[~,数控,Nr] =大小(V (1,1: NumSTS:));V = bfDecompress (angidx、Nr、数控、NumBitsPhi NumBitsPsi);结束steeringMat = V (: 1: NumSTS:);% Beamformed数据传输psduLength = getPSDULength (cfgHE);% PSDU长度字节txPSDU =兰迪([0,1],psduLength * 8, 1);%生成随机PSDUcfgHE。SpatialMappingMatrix = steeringMat;tx = wlanWaveformGenerator (txPSDU cfgHE);% 0添加到允许通道延迟txPad = [tx;0 (50,cfgHE.NumTransmitAntennas)];%通过减弱室内TGax通道rx = tgaxChannel (txPad);%通过波形通过AWGN信道rx = awgn (rx, packetSNR);%包检测和确定粗包抵消chanBW coarsePktOffset = wlanPacketDetect (rx);如果isempty (coarsePktOffset)%如果空没有L-STF检测;包错误numPacketErrors = numPacketErrors + 1;numPkt = numPkt + 1;继续;%去下一个循环迭代结束%提取L-STF并执行粗频率偏移校正lstf = rx (coarsePktOffset + (ind.LSTF (1): ind.LSTF (2)),:);coarseFreqOff = wlanCoarseCFOEstimate (lstf chanBW);rx = frequencyOffset (rx, fs -coarseFreqOff);%提取non-HT领域并确定好包抵消nonhtfields = rx (coarsePktOffset + (ind.LSTF (1): ind.LSIG (2)),:);finePktOffset = wlanSymbolTimingEstimate (nonhtfields chanBW);%确定最终包抵消pktOffset = coarsePktOffset + finePktOffset;%如果给予包检测的范围从预期的延迟%信道建模;包错误如果pktOffset > 50 numPacketErrors = numPacketErrors + 1;numPkt = numPkt + 1;继续;%去下一个循环迭代结束%提取L-LTF并执行好频率偏移校正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);(陈,飞行员)= wlanHELTFChannelEstimate (heltfDemod cfgHE);%数据解调rxData = rx (pktOffset + (ind.HEData (1): ind.HEData (2)),:);demodSym = wlanHEDemodulate (rxData,“数据”,cfgHE);%试点阶段跟踪%平均单个流试验估计符号(二维)pilotEstTrack =意味着(飞行员,2);demodSym = wlanHETrackPilotError (demodSym pilotEstTrack cfgHE,“数据”);他领域的%估计噪声功率据nvar = heNoiseEstimate (demodSym (ofdmInfo.PilotIndices,:,:), pilotEstTrack, cfgHE);%的副载波解调中提取数据符号和通道%的估计demodDataSym = demodSym (ofdmInfo.DataIndices,:,);chanEstData =成龙(ofdmInfo.DataIndices,:,);%均衡和结合方式[eqDataSym, csi] = heEqualizeCombine (demodDataSym chanEstData,据nvar, cfgHE);%恢复数据据nvar rxPSDU = wlanHEDataBitRecover (eqDataSym, csi, cfgHE,“LDPCDecodingMethod”,“norm-min-sum”);%确定任何比特错误,即数据包错误packetError = ~ isequal (txPSDU rxPSDU);numPacketErrors = numPacketErrors + packetError;numPkt = numPkt + 1;结束%计算包错误率在信噪比点(/)packetErrorRate (ibf isnr) = numPacketErrors / (numPkt-1);disp ([“主持人”num2str (cfgHE.MCS)”、“…“信噪比”num2str(信噪比(isnr))…完成后的num2str (numPkt-1)“包”,…“每:”num2str (packetErrorRate (ibf, isnr))));结束disp(换行符);结束

图;线型= [“k o”“台球”“r - *”];semilogy(信噪比、packetErrorRate(1:),线型(1));持有在;网格在;包含(“信噪比(dB)”);ylabel (“每”);为ibf = 2: numQuant semilogy(信噪比、packetErrorRate (ibf:),线型(ibf));结束dataStr = [string ([压缩的波束形成,换行符…“NumBitsPhi = 4, NumBitsPsi = 2”换行符)…字符串([压缩的波束形成,换行符…“NumBitsPhi = 6, NumBitsPsi = 4”换行符)…“没有波束形成”];传奇(dataStr);标题(sprintf (802.11 ax波束形成的通道% s % s, % s的,cfgHEBase.ChannelBandwidth tgaxChannel.DelayProfile cfgHEBase.ChannelCoding));