Nearly optimal linear transceiver design for amplify‐and‐forward MIMO multiple‐relay systems under MMSE criterion. (7th September 2012)

• Record Type: Journal Article
• Authors: Li, Quanzhong; Huang, Jiyu; Zhang, Guangchi; Qin, Jiayin
• Is Part Of: International journal of communication systems. Volume 27:Number 10(2014:Oct.)
• Page Start: 1702
• Page End: 1713
• Publication Date: 2012-09-07
• Subjects: Telecommunication systems -- Periodicals; 621.382
• DOI: 10.1002/dac.2430
• Languages: English
• ISSNs: 1074-5351

Abstract

<abstract abstract-type="main" id="dac2430-abs-0001"> <title>SUMMARY</title> <p id="dac2430-para-0005">In this paper, we consider amplify‐and‐forward multiple‐input multiple‐output multiple‐relay systems, where all the nodes have multiple antennas. For enhancing link reliability, we address the problem of designing optimal linear transceiver to minimize the mean squared error (MSE) of symbol estimations subject to the total relay transmit power constraint. This problem is highly complex and has not been solved in the literature. We first simplify this optimization problem to one that takes a singular value vector and a unitary matrix as optimization variables. Then based on the analyses for the simplified problem, we develop an iterative algorithm consisting of one boundary optimization and one unitary matrix constrained optimization. We show analytically that the proposed iterative algorithm always converges, and the MSE is monotonically decreasing from one iteration to the next. Finally, numerical results demonstrate the nearly optimal performance of the proposed scheme. Copyright © 2012 John Wiley &amp; Sons, Ltd.</p> </abstract>