Re: [Discuss-gnuradio] GSOC ideas [802.11]

[Jens Elsner]

> > Something obvious (although you might not actually want it :) is a 2D
> > equalizer and higher modulation schemes.
> > MB
> sorry,but i didn't understand..why an equalizer?ofdm don't requeire 
> it,is it?

The equalization step is easy - the hard part is channel estimation 
given a
certain set of pilot symbols on a time-frequency grid.

A 2D-Wiener filter is the best solution in the MMSE sense, but 
time-variant
and depends on the current SNR. A good suboptimal solution might be 2D 
interpolation
based on a precalculated (Wiener-) filter given the pilot positions and 
some reasonable
assumptions on the time/frequency correlation. A simple solution might 
be based on linear
interpolation or a sinc-interpolation if the pilot grid is regular.

There are all sorts of things one could try and compare!

Jens