Rayleighchan function in matlab

Started by thouraya ben salem April 21, 2006
Hi all,

I am modelling a multipath rayleigh channel using matlab function Rayleighchan.

This function models the channel as a FIR filter. You can find the algorithm in the matlab help rayleighchan page or look at the document attached.
Can anybody help me understand the algorithm? why is the channel modelled as a sum of sinc?
Best Regards,
Thouraya
The impulse response of a FIR filter is basically a sinc signal sampled
at sampling period T until the length of the filter. Hk is the complex
value at each of the path delay specified by the user. Since we need to
get a Rayleigh distribution a pair of ( for the real and imaginary parts
)white guassian noise source is passed through a Doppler shaping filter
( if required ) and the resulting values for each path delay is the
impulse response of the channel which can be convolved with the
modulator output to simulate the channel effects

Hope this helps

Parag

-----Original Message-----
From: m... [mailto:m...] On Behalf
Of thouraya ben salem
Sent: Thursday, April 20, 2006 8:50 PM
To: m...
Subject: [matlab] Rayleighchan function in matlab

Hi all,

I am modelling a multipath rayleigh channel using matlab function
Rayleighchan.

This function models the channel as a FIR filter. You can find the
algorithm in the matlab help rayleighchan page or look at the document
attached.
Can anybody help me understand the algorithm? why is the channel
modelled as a sum of sinc?
Best Regards,
Thouraya