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Matlab Rayleigh Fading Channel Simulation?
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sairamesh@gmail.com
electronics forum beginner


Joined: 07 Mar 2006
Posts: 3

PostPosted: Mon Mar 13, 2006 10:29 am    Post subject: Re: Matlab Rayleigh Fading Channel Simulation? Reply with quote

Hi,
Yes, the phase has uniform distribution and the magnitude is
Rayleigh distributed.
I have a question assuming coherent BPSK transmission
y=hx+n; where h is a real no whose pdf is Rayleigh. Neglecting the
phase is a correct assumption?

-Regards,
-SaiRamesh.
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Davy
electronics forum addict


Joined: 25 Aug 2005
Posts: 70

PostPosted: Sun Mar 12, 2006 1:48 am    Post subject: Re: Matlab Rayleigh Fading Channel Simulation? Reply with quote

Hi,

Yes, there is no correlation in temporal and frequency domains.
I have read the Probability book. The frequency shift is uniformly
distribution. And the fading is Rayleigh distribution.

Thanks!
Davy
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James G.
electronics forum beginner


Joined: 12 Mar 2006
Posts: 1

PostPosted: Sun Mar 12, 2006 12:21 am    Post subject: Re: Matlab Rayleigh Fading Channel Simulation? Reply with quote

Davy, you seem to assume that there is no correlation in temporal and
frequency domains, don't you?
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sairamesh@gmail.com
electronics forum beginner


Joined: 07 Mar 2006
Posts: 3

PostPosted: Sun Mar 12, 2006 12:14 am    Post subject: Re: Matlab Rayleigh Fading Channel Simulation? Reply with quote

Yes, it is perfectly right.
Generally, we assume coherent system, so the phase is perfectly
estimated. hence the phase of the fading constant can be neglected.
-SaiRamesh.

Davy wrote:
Quote:
Hi all,

I have got a Rayleigh Fading Channel Simulation code by Matlab.

The code list below:
% Rayleigh fading
a = sqrt(0.5)*( randn( 1, symbols_per_frame) + j*randn( 1,
symbols_per_frame) );
% complex noise
noise = sqrt(variance)*( randn(1,symbols_per_frame) +
j*randn(1,symbols_per_frame) );
% in all
code_fade = a.*code + noise;

Is the code right? If not right, how to modify it?

Best regards,
Davy
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Davy
electronics forum addict


Joined: 25 Aug 2005
Posts: 70

PostPosted: Mon Mar 06, 2006 9:23 am    Post subject: Matlab Rayleigh Fading Channel Simulation? Reply with quote

Hi all,

I have got a Rayleigh Fading Channel Simulation code by Matlab.

The code list below:
% Rayleigh fading
a = sqrt(0.5)*( randn( 1, symbols_per_frame) + j*randn( 1,
symbols_per_frame) );
% complex noise
noise = sqrt(variance)*( randn(1,symbols_per_frame) +
j*randn(1,symbols_per_frame) );
% in all
code_fade = a.*code + noise;

Is the code right? If not right, how to modify it?

Best regards,
Davy
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