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Optimal Source and Relay Design for Multiuser MIMO AF Relay Communication Systems with Direct Links and Imperfect Channel Information

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Open access
Authors
He, Z.
Zhang, X.
Bi, Y.
Jiang, W.
Rong, Yue
Date
2016
Type
Journal Article

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He, Z. and Zhang, X. and Bi, Y. and Jiang, W. and Rong, Y. 2016. Optimal Source and Relay Design for Multiuser MIMO AF Relay Communication Systems with Direct Links and Imperfect Channel Information. IEEE Transactions on Wireless Communications. 15 (3): pp. 2025-2038.
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IEEE Transactions on Wireless Communications
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Department of Electrical and Computer Engineering
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Copyright © 2016 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 propose statistically robust design for multiuser multiple-input multiple-output (MIMO) relay systems with direct source-destination links and imperfect channel state information (CSI). The minimum mean-squared error (MMSE) of the signal waveform estimation at the destination node is adopted as the design criterion. We develop two iterative methods to solve the nonconvex joint source, relay, and receiver optimization problem. Simulation results demonstrate the improved robustness of the proposed algorithms against CSI errors.