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

摘要

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 to reduce the complexity of the algorithm.