OFDM channel modelling and estimation

Started by davi...@yahoo.com March 22, 2007
Dear all,

I am David Lee and as a new member to this group I send my regards to everyone.

I will be very grateful if anyone could help to model multipath fading for the IEEE 802.11a OFDM standard and also tell me which channel estimation technique to use for that standard.

So far I know that given the impulse response of a multi-path fading channel we can represent it as a vector for e.g h = [1 0 0 0.5 0.2] and if we want to fade a signal x with that channel then we can use matlab's filter function as follows :

y = filter(h,1,x); where y is our faded signal.

But what I would like to know is that can the multi-path fading for the IEEE 802.11a standard be modelled likewise and if yes what values have to be put in the channel vector h ? Also how to perform channel estimation for the IEEE 802.11a syandard ?