about the 16qam demodulation in fading channel
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about the 16qam demodulation in fading channel

 
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drproflipa
Guest
Posted: Wed Dec 14, 2005 5:16 pm    Post subject: about the 16qam demodulation in fading channel Reply with quote
Dear all,

When I tried to calculate the BER in flat fading channel of 16QAM signals
It is found that the the performance very difficult to approach th
theoretical values. But in AWGN the demodulation algorithm works well.
found BER in fading channel is very sensitive to the Doppler. Any one ca
give some direction?

Thanks in advance
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Guri
Guest
Posted: Fri Dec 16, 2005 9:16 am    Post subject: Re: about the 16qam demodulation in fading channel Reply with quote
Hi ,

It is easy to reach AWGN theoterical results since in AWGN we are just
ADDING the noise while in a fading channel , multiplicative effect is
observed (which is kinda tricky and has higher variance).

I guess if you are doing Monte Carlo simulations, try to average your
BER over more number of iterations.

hope that helps.....



drproflipa wrote:
Quote:
Dear all,

When I tried to calculate the BER in flat fading channel of 16QAM signals.
It is found that the the performance very difficult to approach the
theoretical values. But in AWGN the demodulation algorithm works well. I
found BER in fading channel is very sensitive to the Doppler. Any one can
give some direction?

Thanks in advance
Back to top
 
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