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Thread Subject:
Rayleigh CHannel Problem (rayleighchan)

Subject: Rayleigh CHannel Problem (rayleighchan)

From: mahmud_dbm

Date: 23 Feb, 2010 02:59:04

Message: 1 of 2

Hello...

I'm Working on parallel transmission say for 1000 bits of 100 parallel streams. using reyleighchan, now i set my channel with chan=rayleighchan and some required parameters, then coeff=chan.PathGain; wud give me the channel status and at the receiver i simply divide received streams by coeff; and i'm getting exact performance.

Now my question is:
What kind of Equalization is this, i think it is somewhat more than adaptive equalization, because i'm getting 100 different Coeffs for 100 different streams and i'm simply dividing by the status very easily, now in practice "which kind of Equalization" wud give me this Performance..????

Practically how would i get this status directly like this. ? or is it possible at all to get coeffs like this.?

Thank You

Mahmud

Subject: Rayleigh CHannel Problem (rayleighchan)

From: nanren888

Date: 28 Feb, 2010 05:55:05

Message: 2 of 2

"mahmud_dbm " <mahmud_dbm@yahoo.com> wrote in message <hlvg9o$c3n$1@fred.mathworks.com>...
> Hello...
>
> I'm Working on parallel transmission say for 1000 bits of 100 parallel streams. using reyleighchan, now i set my channel with chan=rayleighchan and some required parameters, then coeff=chan.PathGain; wud give me the channel status and at the receiver i simply divide received streams by coeff; and i'm getting exact performance.
>
> Now my question is:
> What kind of Equalization is this, i think it is somewhat more than adaptive equalization, because i'm getting 100 different Coeffs for 100 different streams and i'm simply dividing by the status very easily, now in practice "which kind of Equalization" wud give me this Performance..????
>
> Practically how would i get this status directly like this. ? or is it possible at all to get coeffs like this.?
>
> Thank You
>
> Mahmud

It might be called an omniscient equaliser.
Generally the channel state is not observable directly.
I think the game in designing equalisers is to estimate as well as you can, or as well as you need to, from the observable changing parameters, eg received signal.

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