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Sampling time in Rayleighchan

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Ahmed Alaa

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Hi all,

I am using MATLAB's Rayleighchan function to simulate a fading channel. My OFDM system chip rate/Sampling rate = 5.55 MHz, but giving this rate to the function will cause an 'Out of Memory' error, so I enter a sampling rate of 4096 Hz and normalize path delays to this by multiplying path delays by 5.55 MHz / 4096 Hz.

My Question is: Do I have to normalize the doppler frequency as well? i.e. assume I am working on a speed of 30 km/hr, do I need to enter it as 30 km/hr * (4096/5.55 MHz) to keep the coherence time normalized ??

Thanks :)
 

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