[求助]用matlab对turbo码进行仿真，要求得到编码译码前后的波形图

aisang08

现在我想将下面的程序改成实现turbo码 下载次数: 2 半小时前 编译码的程序，能够出来turbo码编码前、编码后、译码后的波形，具体的代码在附件中，主程序在下面 clc clear SNR = 0:0.5:3; nframe = 1000; length_frame = 192; rate = 1/2; num_of_iter = 10; % g = [1 1 1 1 1 % 1 0 0 0 1]; % (37,21)生成和反馈多项式 % g = [1 1 1 % 1 0 1]; % (7,5)生成和反馈多项式 % g = [1 0 1 1 % 1 1 0 1]; % LTE标准Turbo码 g = [1 1 0 1 1 1 1 1]; % (15,17)生成和反馈多项式 for nn=1:length(SNR) Es_N0 = rate*10^(SNR(nn)/10); N0 = 1/Es_N0; for frame=1:nframe frame %% source data data = round(rand(1,length_frame)); %% RSC encoder [ Turbo_data, interleaver_index ] = Turbo_encoder( data, rate, g ); %rate = 1/2 or 1/3 %% BPSK调制 mod_out = 2*Turbo_data-1; %% 经过AWGN信道 channel_out = mod_out+sqrt(N0/2)*randn(size(mod_out)); %% log_MAP算法译码 data_out = Turbo_decoder( channel_out, N0, rate, interleaver_index, num_of_iter, g); error(frame) = sum(xor(data,data_out)); end BER(nn) = sum(error)/nframe/length_frame end hold on semilogy(SNR,BER,'-bo');