16QAM仿真代码(matlab)

16QAM 系统仿真 function ber AWGN ber Ray M16QAM EbN0dB 1 3 30 EbN0dB1 1 10 N 4 100000 for ii 1 length EbN0dB sigma2 ii 2 5 2 4 10 EbN0dB ii 10 sigma21 ii 2 5 2 4 10 EbN0dB1 ii 10 bits randint 1 N 调制 s M16QAM modulate bits length bits Rayleign 信道干扰 noise sqrt sigma2 ii randn 1 N 4 1i randn 1 N 4 h sqrt 0 5 randn 1 N 4 1i randn 1 N 4 receiver s h noise Rayleign 衰减信道 高斯信道干扰 noise1 sqrt sigma21 ii randn 1 N 4 1i randn 1 N 4 receiver1 s noise1 高斯信道 信道均衡 receiver receiver h 解调并计算误码率 Rayleign 信道 demodata M16QAM demodulate receiver length receiver errCount sum abs bits demodata ber Ray ii errCount N 解调并计算误码率 高斯信道 demodata M16QAM demodulate receiver1 length receiver1 errCount sum abs bits demodata ber AWGN ii errCount N end end 16QAM 调制 function s M16QAM modulate bits N ii 0 for i 1 4 N ii ii 1 if bits i 0 elseif bits i 1 elseif bits i 1 elseif bits i 0 elseif bits i 0 elseif bits i 0 elseif bits i 1 elseif bits i 1 elseif bits i 1 elseif bits i 1 elseif bits i 0 elseif bits i 0 elseif bits i 0 elseif bits i 1 elseif bits i 1 elseif bits i 0 end end end 16 QAM 解调 function demodata M16QAM demodulate receiver N A 0 1 0 1 1 0 0 1 1 0 1 0 0 1 1 0 1 inf 0 1 0 1 1 inf 1 0 1 inf inf 1 0 1 inf 1 1 0 1 0 inf 1 0 1 inf 1 1 inf 1 0 1 inf 1 inf inf 1 1 inf inf 1 inf 1 1 inf inf 1 for k 1 N if real receiver