Re: multipath channel simulation
- From: Hung <nghhung@xxxxxxxxxxxxxx>
- Date: Fri, 30 Sep 2005 06:56:45 -0400
Please send me for file rayleighchan.m
Thankyou
Elan wrote:
>
>
> Hi
> I am trying to implement an alamouti mimo-ofdm system.
> I am not really sure how I should go around creating the multipath
> channel.
> According to alamouti the channel has to stay constant over a
> period
> of two symbols but I can't seem to figure out how to do this with
> the
> matlab multipath function.
> right now what I'm doing to create the channel is:
>
> ------------------------------------------
> ts=5e-8; %sample time
> fd=30; %max doppler shift
> tau=[0 10 20 30 40 50 60 70 80 90 110 140 170 200 240 290 340
> 390]*1e-9;
> pdb=[0 -0.9 -1.7 -2.6 -3.5 -4.3 -5.2 -6.1 -6.9 -7.8 -4.7 -7.3 -9.9
> -12.5 -13.7 -18 -22.4 -26.7];
> chan = rayleighchan(ts,fd,tau,pdb);
> out= filter(chan,data);
> ------------------------------------------
> Also the channel is applied to the symbols in the time domain after
> the ofdm ifft but the channel needs to be constant in the freq.
> domain after the fft.
> any ideas anyone? I'm getting desperate here.
>
> Elan.
.
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