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Joint Transceiver Optimization for Multiuser MIMO Relay Communication Systems

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Authors
Khandaker, Muhammad
Rong, Yue
Date
2012
Type
Journal Article

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Khandaker, M. R. A. and Rong, Yue. 2012. Joint Transceiver Optimization for Multiuser MIMO Relay Communication Systems. IEEE Transactions on Signal Processing. 60 (11): pp. 5977-5986.
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IEEE Transactions on Signal Processing
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© 2012 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

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Abstract

In this paper, we address the optimal source, relay, and receive matrices design for linear non-regenerative uplink multiuser multiple-input multiple-output (MIMO) relay communication systems. The minimum mean-squared error (MMSE) of the signal waveform estimation at the destination node is adopted as our design criterion. We develop two iterative methods to solve the highly nonconvex joint source, relay, and receiver optimization problem. In particular, we show that for given source precoding matrices, the optimal relay amplifying matrix diagonalizes the source-relay-destination channel. While for fixed relay matrix and source matrices of all other users, the source matrix of each user has a general beamforming structure. Simulation results demonstrate that the proposed iterative source and relay optimization algorithms perform much better than existing techniques in terms of both MSE and bit-error-rate.