A DIVIDE-AND-CONQUER ALGORITHM FOR CHANNEL ESTIMATION IN MULTI-USER SPACE-TIME CODED TRANSMISSIONS (ThuPmPO4)

Author(s) : Waleed Younis (University of California at Los Angeles, USA) Ali Sayed (University of California at Los Angeles, USA)

Abstract : We develop channel estimation techniques for multiple-input multiple-output (MIMO) channels that employ space-time block-coded (STBC) transmissions. We derive the MMSE channel estimator for multi--user Alamouti STBC transmissions over both flat fading and frequency selective fading channels. The derivation exploits the structure of the space-time code and leads to an O(Mî2) divide--and--conquer estimation algorithm.

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