Re: Does anybody have Octave code to draw Rayleigh fading envelope?

[David Bateman]

Illidan Modeler wrote:
> Thanks for your reply.
>
> There are a number of papers and scripts that deal with BER-SNR curve.
> But I need to compute amplitude-time curve, as given in a paper by J.
> I. Smith in 1975, with the title "a computer generated multipath
> fading simulation". This
> paper even gives listing of source code. But it's not Matlab/Octave
> code (seems like Fortran that I don't read).
>   

Well, if you have a BER curve the data to plot what you want is surely 
already somewhere in your simulator. The type of curve you are asking 
for can be useful for OFDM signals for example where your interested in 
the peak to average ratio in the preamble and the data of the frame, as 
the standards impose limitations on what the ratio should be. After the 
passing through the channel its more interesting to know the impulse 
response of the channel, to check the guard interval for an OFDM signal 
or the placement of the fingers of your rake receiver for a CDMA system. 
In that case this is obtained directly from the channel matrix H itself 
and not from a BER simulator.

In any case without seeing your code I can't really supply any other 
help. I have lots of code of this sort, but my employer wouldn't be 
happy with me sharing it :-)

D.