channel.asv

THIS IS A BLIND QUALIZATION ALGORITHM. 2BPSK MODULATION 3 MUTIPATH

function [output]=channel(input,SNR_dB)
%     h=[0.7+0.7j 0.5+0.5j 0.1+0.1j];
%     snr=10^(SNR_dB/10);
%     sigma=sqrt(sum((abs(h).^2)')/snr/2);
%     output=conv(input,input);
%     vec_length=length(output);
%     noise=sigma*randn(1,vec_length)+j*sigma*randn(1,vec_length);
%     output=output+noise;
     vec_length=length(input);
     snr=10^(SNR_dB/10);
     sigma=sqrt(sum((abs(h).^2)')/snr/2);
     noise=sigma*randn(1,vec_length)+j*sigma*randn(1,vec_length);