802.11 n包错误率模拟2 x2 TGn通道

%创建一个2×2 HT传输格式配置对象cfgHT = wlanHTConfig;cfgHT。ChannelBandwidth =“CBW20”;% 20 MHz带宽通道cfgHT。NumTransmitAntennas = 2;% 2传输天线cfgHT。NumSpaceTimeStreams = 2;% 2时空流cfgHT。PSDULength = 1000;% PSDU长度字节cfgHT。MCS = 15;% 2的空间流,64 - qam rate-5/6cfgHT。ChannelCoding =“* *”;% BCC信道编码

%创建和配置通道tgnChannel = wlanTGnChannel;tgnChannel。DelayProfile =“b型”;tgnChannel。NumTransmitAntennas = cfgHT.NumTransmitAntennas;tgnChannel。NumReceiveAntennas = 2;tgnChannel。TransmitReceiveDistance = 10;%在米距离了仿真结果tgnChannel。LargeScaleFadingEffect =“没有”;tgnChannel。NormalizeChannelOutputs = false;

信噪比= 25:10:45;

maxNumPEs = 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

%得到基带采样率fs = wlanSampleRate (cfgHT);%的OFDM信息ofdmInfo = wlanHTOFDMInfo (“HT-Data”,cfgHT);%设置通道的采样率tgnChannel。SampleRate = f;%访问时域数据包中的每个字段的索引印第安纳州= wlanFieldIndices (cfgHT);

S =元素个数(信噪比);packetErrorRate = 0(年代,1);% parfor i = 1: S %使用parfor加快仿真为i = 1: S%使用‘为’调试仿真%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”,0);流。Substream =我;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(i) -10 * log10 (ofdmInfo.FFTLength / ofdmInfo.NumTones);%循环模拟多个数据包numPacketErrors = 0;n = 1;%指数数据包传输而numPacketErrors < = n < = maxNumPackets maxNumPEs & &%生成一个数据包波形txPSDU =兰迪([0,1],cfgHT.PSDULength * 8, 1);% PSDULength以字节为单位tx = wlanWaveformGenerator (txPSDU cfgHT);% 0添加到允许延迟通道过滤器tx = [tx;cfgHT.NumTransmitAntennas 0(15日)];% #好< AGROW >%通过波形通过TGn信道模型重置(tgnChannel);%重置渠道不同的实现rx = tgnChannel (tx);%添加噪声rx = awgn (rx, packetSNR);%包检测和确定粗包抵消cfgHT.ChannelBandwidth coarsePktOffset = wlanPacketDetect (rx);如果isempty (coarsePktOffset)%如果空没有L-STF检测;包错误numPacketErrors = numPacketErrors + 1;n = n + 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 cfgHT.ChannelBandwidth);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,…cfgHT.ChannelBandwidth);%确定最终包抵消pktOffset = coarsePktOffset + finePktOffset;%如果给予包检测的范围预计延误的%信道建模;包错误如果pktOffset > 15 numPacketErrors = numPacketErrors + 1;n = n + 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lltf = rx (pktOffset + (ind.LLTF (1): ind.LLTF (2)),:);fineFreqOff = wlanFineCFOEstimate (lltf cfgHT.ChannelBandwidth);rx = frequencyOffset (rx, fs -fineFreqOff);%从波形中提取HT-LTF样本,解调并执行%信道估计htltf = rx (pktOffset + (ind.HTLTF (1): ind.HTLTF (2)),:);htltfDemod = wlanHTLTFDemodulate (htltf cfgHT);陈= wlanHTLTFChannelEstimate (htltfDemod cfgHT);%从波形中提取HT数据样本htdata = rx (pktOffset + (ind.HTData (1): ind.HTData (2)),:);%估计噪声功率在HT数据字段nVarHT = htNoiseEstimate (htdata,成龙,cfgHT);%恢复PSDU HT数据传输rxPSDU = wlanHTDataRecover (htdata,成龙、nVarHT cfgHT,…“LDPCDecodingMethod”,“norm-min-sum”);%确定任何比特错误,即数据包错误packetError =任何(biterr (txPSDU rxPSDU));numPacketErrors = numPacketErrors + packetError;n = n + 1;结束%计算包错误率在信噪比点(/)packetErrorRate (i) = numPacketErrors / (n - 1);disp ([“信噪比”num2str(信噪比(i))…完成后的num2str (n - 1)“包”,…“每:”num2str (packetErrorRate (i))));结束

图;packetErrorRate semilogy(信噪比,“ob”);网格在;包含(“信噪比(dB)”);ylabel (“每”);标题(“802.11 n 20 mhz, MCS15,直接映射,2 x2通道模型B-NLOS”);