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Are there any advantages in doing OFDM in a flat fading Rayleigh environment?

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anta

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Hi all! I would like to ask if there's any advantage in doing OFDM in a flat fading Rayleigh environment?
Also can anyone tell me if there would be any difference in the BERvsSNR results , when we simulate a flat Rayleigh channel and a frequency selctive exponential channel, where each tap follows Rayleigh distribution...

Any answer will be helpful
:D
 

Re: OFDM question

guys is there any insight into this?

it's very urgent thanx
 

Re: OFDM question

anta said:
Hi all! I would like to ask if there's any advantage in doing OFDM in a flat fading Rayleigh environment?
Also can anyone tell me if there would be any difference in the BERvsSNR results , when we simulate a flat Rayleigh channel and a frequency selctive exponential channel, where each tap follows Rayleigh distribution...

Any answer will be helpful
:D

This will tell you the best possible performance of an OFDM system in a multi-path fading channel.

Remember, we can design the OFDM modem so that frequency selective fading looks like flat fading.

Hope this helps
 

Re: OFDM question

So this means that if we have no ISI the BER plot should be the same in a Rayleigh flat fading environment with and without OFDM?
 

Re: OFDM question

Thanx for your kind reply but i think i am missing sth here.. I have simulated Rayleigh flat fading and frequency selective fading both with OFDM. in this case freq selective fading will be 'transform ' in flat fading? I thought tha that BER with OFDM in a freq selective channel is the same as the BER for flat fading without OFDM. Am i missing sth here?

Added after 5 minutes:

SO my basic question is whether the BER fig is the same for Rayleigh flat fading with and without OFDM?
 

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