channel.m

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

function [output]=channel(input,SNR_dB)
    h=[0.7 0.5 -0.6];
    %h=[1 randn(1,1) randn(1,1)];
    snr=10^(SNR_dB/10);
    sigma=sqrt(sum((abs(h).^2)')/snr);
    output=filter(h,1,input);
    vec_length=length(output);
    noise=sigma*randn(1,vec_length);
    output=output+noise;