channel model impairment matlab code

Channel model impairment in MATLAB

This section of MATLAB source code covers channel model impairment and rayleigh channel effect on constellation diagram using matlab code.

Part A and PART C of the matlab code is same as mentioned on AWGN page.

Source code - PART B

%Adding Rayleigh channel
choice=input('Enter 1 to apply the channel, other no. to bypass:');
%10 Hz;sample time=0.1e-3;

if(choice==1)
ts=(256/4e6);
doppler=0.1;
tau=[0.0 0.4 0.9];
pdb=[0 -15 -20];
chan = rayleighchan(ts,doppler,tau,pdb);
%TS is the sample time of the input %0.1e-3;
%signal, in seconds. FD is the maximum Doppler shift, in Hertz. %100 Hz
map_out_chl=filter(chan,mapper_out_ori);
figure;plot(real(map_out_chl),imag(map_out_chl),'r+');title('constellation with channel');
else
disp('no channel applied proceed to DC offset');
end

Input and output constellation diagram

Channel model impairment in MATLAB

Source code - PART B

Input and output constellation diagram

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