tu4_5.m

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=[0.190980769230769,0.176826923076923,0.157192307692308,0.136230769230769,0.112596153846154,0.090461538461538,0.06825,0.049961538461538,0.032980769230769,0.024634615384615,0.014519230769231];
err_21=[0.117307692307692,0.096153846153846,0.077576923076923,0.059942307692308,0.043596153846154,0.029826923076923,0.018538461538462,0.011634615384615,0.006942307692308,0.002884615384615,0.00125];
err_12=[0.044115384615385,0.035884615384615,0.025153846153846,0.018846153846154,0.013557692307692,0.007961538461538,0.004173076923077,0.002115384615385,0.001096153846154,0.000519230769231,0.000230769230769];
err_22=[0.080903846153846,0.061173076923077,0.046461538461538,0.031788461538462,0.02075,0.01,0.004076923076923,0.001807692307692,0.000596153846154,0.000134615384615,0];
err_14=[0.027307692307692,0.020057692307692,0.012403846153846,0.007038461538462,0.003403846153846,0.001442307692308,0.000403846153846,0.000192307692308,0,0,0.000019230769231];
%
figure;
semilogy(snr,err_11','k-o',snr,err_21','b-*',snr,err_12','g-x',snr,err_22','r-.',snr,err_14','m-^');
xlabel('SNR[dB]')
ylabel('BER')
axis([min(snr) max(snr) 1e-6 1e-0])
legend('uncode','2Tx,1Rx','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')