tu4_9.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=[0.095269230769231,0.057384615384615,0.027538461538462,0.011615384615385,0.003769230769231,0.001115384615385,0.000423076923077,0.000038461538462,0,0,0];
err_est=[0.187384615384615,0.129269230769231,0.080307692307692,0.046076923076923,0.019230769230769,0.006923076923077,0.002384615384615,0.0005,0.000038461538462,0.000038461538462,0];
figure;
semilogy(snr,err','k-o',snr,err_est','b-*');
xlabel('SNR[dB]')
ylabel('BER')
axis([min(snr) max(snr) 1e-6 1e-0])
legend('QPSK perfect','QPSK imperfect')
title('平坦瑞利衰落信道，频谱效率2bit/s/Hz,帧长为130，100个数据块，不是完美的信道估计')