Robust Relay Beamforming for Two-Way Relay Networks

被引：35

作者：

Tao, Meixia ^{[1
]}

Wang, Rui ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Dept Elect Engn, Shanghai, Peoples R China

来源：

IEEE COMMUNICATIONS LETTERS | 2012年 / 16卷 / 07期

关键词：

Two-way relaying; beamforming; channel uncertainty; robust optimization; CHANNEL;

D O I：

10.1109/LCOMM.2012.050412.120481

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

We study the design of robust relay beamforming for two-way relay networks by considering channel feedback errors. Our objective is to maximize the minimum worst-case signal-to-noise ratios (SNRs) of two sources subject to a total relay power budget. We first decompose this non-convex problem into a series of relay power minimization problems under minimum SNR constraints by using bisection search. Then the relay power minimization problem is recast to a semidefinite programming relaxation (SDR) problem. A suboptimal but efficient solution is finally obtained for the original design. A necessary condition for the power minimization problem to be feasible is also given. For the special case with perfect channel state information, an alternative algorithm is introduced to find the optimal beamformer, which has lower complexity than the existing method.

引用

页码：1052 / 1055

页数：4

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