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Wireless Personal Communications
Erschienen in: Wireless Personal Communications 1/2014

01.03.2014

Weighted Sum Rate Maximization for Downlink Multiuser Relay Network with Direct Link

verfasst von: Qi Sun, Lihua Li

Erschienen in: Wireless Personal Communications | Ausgabe 1/2014

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Abstract

This paper investigates the joint source, relay precoder and receive filters optimization, aiming to maximize the weighted sum rate (WSR) for non-regenerative downlink multiuser MIMO relay network with source-destination direct link. The joint transceiver is developed taking both the direct link and the relay link into consideration with individual source and relay power constraints. Since the WSR problem is generally non-convex and intractable, it’s difficult to solve directly. Inspired by the recent results of relationship between the mutual information and the mean-square-error, we reformulate the WSR problem into a weighted sum mean square error minimization problem. An iterative algorithm is developed to solve the WSR problem. Simulation results demonstrate that the proposed algorithm offers significant performance gain over existing methods. In addition, we also propose a modified robust joint transceiver design against the imperfect channel state information.
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Metadaten
Titel
Weighted Sum Rate Maximization for Downlink Multiuser Relay Network with Direct Link
verfasst von
Qi Sun
Lihua Li
Publikationsdatum
01.03.2014
Verlag
Springer US
Erschienen in
Wireless Personal Communications / Ausgabe 1/2014
Print ISSN: 0929-6212
Elektronische ISSN: 1572-834X
DOI
https://doi.org/10.1007/s11277-013-1367-6

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