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Modulating and Demodulating QAM Signal over rayleigh Fading Channel

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David83

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Hello

I am trying to simulate 16-QAM over Rayleigh fading channel with following code:

Code:
clear all;
clc;

SNRdB=0:20;
SNR=10.^(SNRdB./10);

nErr=zeros(1,length(SNR));
NofSymbols=zeros(1,length(SNR));
Ne=1000;

for ii=1:length(SNR)
    count=0;
    while nErr(ii)<=Ne
        count=count+1;
        z=randi([0 15],1,10);
        s=qammod(z,16);
        
        h=(1/sqrt(2)).*(randn(1,10)+1i.*randn(1,10));
        n=(1/sqrt(2*SNR(ii))).*(randn(1,10)+1i.*randn(1,10));
        
        y=h.*s+n;
        
        sHat=qamdemod(y,16);
        
        nErr(ii)=nErr(ii)+sum(sHat~=s);
    end
    NofSymbols(ii)=count*10;
end
SER=nErr./NofSymbols;

semilogy(SNRdB,SER)

but it does not work. What is wrong?

Thanks
 

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