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From: 骑士 暗黑 on 21 Jun 2010 04:31
Hi,
I want to do some simulation for the FM modulated signal in
multipath fading channel. Can you help to check the following matlab
scrip is correct or not. Thanks.

%m is the modulated signal
phase = pi * cumsum(m);
SIGNAL = exp(j * (phase));


delaySamples=5;


firstPath=SIGNAL;
secondPath=SIGNAL(delaySamples+1:end);
secondPath=[secondPath;zeros(1,delaySamples)'];


SNR=70;
gain=0.1;


firstPath=awgn(firstPath,SNR);
secondPath=awgn(secondPath,SNR);
rx_SIGNAL=firstPath+gain*secondPath;


I am not sure the delay and the noise can be added on the complex
baseband siganl or not.


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