Joint source/relay precoder design in amplify-and-forward relay systems using an MMSE criterion

Fan Shuo Tseng*, Wen-Rong Wu, Jwo-Yuh Wu

*此作品的通信作者

研究成果: Conference contribution同行評審

4 引文 斯高帕斯(Scopus)

摘要

This paper addresses the joint source/relay precoder design problem in amplify-and-forward (AF) cooperative communication systems where multiple antennas are equipped at the source, the relay, and the destination. Existing solutions to the problem only consider the relay link and, thus, do not fully exploit all the available link resource. Using a minimum-meansquared-error (MMSE) criterion, we propose a joint precoder design method, taking both the direct and relay links into account. It is shown that the MMSE is a highly nonlinear function of the precoder matrices, and a direct minimization is not feasible. To facilitate analysis, we propose to design the precoders toward first diagonalizing the MSE matrix of the relay link. This imposes certain structural constraints on both precoders that allow us to derive an analytically tractable MSE upper bound. By conducting minimization with respect to this upper bound, the solution can be obtained by an iterative waterfilling technique. Simulations show that the proposed design can significantly enhance the performance of MIMO AF cooperative systems.

原文English
主出版物標題2009 IEEE Wireless Communications and Networking Conference, WCNC 2009 - Proceedings
DOIs
出版狀態Published - 22 9月 2009
事件2009 IEEE Wireless Communications and Networking Conference, WCNC 2009 - Budapest, Hungary
持續時間: 5 4月 20098 4月 2009

出版系列

名字IEEE Wireless Communications and Networking Conference, WCNC
ISSN(列印)1525-3511

Conference

Conference2009 IEEE Wireless Communications and Networking Conference, WCNC 2009
國家/地區Hungary
城市Budapest
期間5/04/098/04/09

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