Fundamentals of statistical signal processing: estimation theory
Fundamentals of statistical signal processing: estimation theory
Wireless Communications
Efficient Adaptive SVD Algorithm for MIMO Applications
IEEE Transactions on Signal Processing
Cooperative diversity in wireless networks: Efficient protocols and outage behavior
IEEE Transactions on Information Theory
Fading relay channels: performance limits and space-time signal design
IEEE Journal on Selected Areas in Communications
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In this work we present an adaptive beamforming scheme for the uplink transmission of a cooperative wireless system consisted of a single antenna source, single antenna relays and a multiple antenna destination (base station). First, we present a SVD-based beamforming scheme under the assumption that perfect Channel State Information (CSI) is available at the transmitting nodes. Then, we develop an efficient adaptive version of this scheme which requires only partial CSI. The amount of CSI feedback is reduced by employing a prediction mechanism for the singular vectors, at both the transmitters' and the receiver's ends. We evaluate the performance of this system for the amplify-and-forward cooperation protocol.