www.gusucode.com > wlan 源码程序 matlab案例代码 > wlan/RecoverVHTSIGAin2x2MIMOChannelExample.m
%% Recover VHT-SIG-A in 2x2 MIMO Channel % Recover VHT-SIG-A in a 2x2 MIMO channel with AWGN. Confirm that the |CRC| % check passes. %% % Configure a 2x2 MIMO VHT channel. chanBW = 'CBW20'; cfgVHT = wlanVHTConfig('ChannelBandwidth', chanBW, 'NumTransmitAntennas', 2, 'NumSpaceTimeStreams', 2); %% % Generate L-LTF and VHT-SIG-A waveforms. txLLTF = wlanLLTF(cfgVHT); txVHTSIGA = wlanVHTSIGA(cfgVHT); %% % Pass the L-LTF and VHT-SIG-A waveforms through a 2×2 MIMO channel % with white noise. mimoChan = comm.MIMOChannel('SampleRate', 20e6); rxLLTF = awgn(mimoChan(txLLTF), 15); rxVHTSIGA = awgn(mimoChan(txVHTSIGA),15); %% % Demodulate the L-LTF signal. To generate a channel estimate, use the % demodulated L-LTF. demodLLTF = wlanLLTFDemodulate(rxLLTF, chanBW, 1); chanEst = wlanLLTFChannelEstimate(demodLLTF, chanBW); %% % Recover the information bits in VHT-SIG-A. [recVHTSIGABits, failCRC, eqSym] = wlanVHTSIGARecover(rxVHTSIGA, chanEst, 0, chanBW); %% % Visualize the scatter plot of the equalized symbols, |eqSym|. scatterplot(eqSym(:))