tu4_7.asv

多输入多输出系统不同收发天线对系统性能的影响

snr=[0:2:20];
err_11=[0.180923076923077,0.146307692307692,0.113461538461538,0.082115384615385,0.057153846153846,0.039346153846154,0.025653846153846,0.017653846153846,0.010423076923077,0.006769230769231,0.0045];
err_21=[0.189346153846154,0.137730769230769,0.094192307692308,0.058769230769231,0.033615384615385,0.017115384615385,0.007923076923077,0.003538461538462,0.001615384615385,0.000576923076923,0.000192307692308];
err_31=[0.166365384615385,0.127942307692308,0.093807692307692,0.063788461538462,0.043057692307692,0.023115384615385,0.012211538461538,0.005307692307692,0.001653846153846,0.000673076923077,0.000192307692308];
err_41=[0.080903846153846,0.061173076923077,0.046461538461538,0.031788461538462,0.02075,0.01,0.004076923076923,0.001807692307692,0.000596153846154,0.000134615384615,0];

figure;
semilogy(snr,err_11','k-o',snr,err_21','b-*',snr,err_31','g-x',snr,err_41','r-.');
xlabel('SNR[dB]')
ylabel('BER')
axis([min(snr) max(snr) 1e-6 1e-0])
legend('uncode QP','1x2','1Tx,2Rx','2Tx,2Rx','1Tx,4Rx')
title('平坦瑞利衰落信道下，帧长为130，100个数据块，16QAM调制方式下，不同收发天线时的误码率')