mimo-ofdm channel estimation

Hi
I am trying to simulate a mimo-ofdm wireless system.  I have most of the
blocks ready but I could not figure out how to implement channel
estimation in the mimo enviroment.  If anyone could point out a way to do
it or know of a paper that describes this I would appreciate the help.

Thank you.

Elan.

		
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No ideas out there as to how I might do this?
		
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