A Nearly Optimal Amplify-and-Forward Relaying Scheme for Two-Hop MIMO Multi-Relay Networks

被引：22
|
作者：
Fu, Youhua [1 ]
Yang, Luxi [1 ]
Zhu, Wei-Ping [2 ]
机构：
[1] Southeast Univ, Sch Informat Sci & Engn, Nanjing 210096, Jiangsu, Peoples R China
[2] Concordia Univ, Dept Elect & Comp Engn, Montreal, PQ H3G 1M8, Canada
来源：
IEEE COMMUNICATIONS LETTERS | 2010年 / 14卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Relay processing; amplify-and-forward; MIMO relay networks; optimal power allocation;
D O I：
10.1109/LCOMM.2010.03.091779
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
This letter proposes a nearly optimal amplify-and-forward (AF) relaying scheme for two-hop and half-duplex distributed relay networks with one source, one destination, and multiple relays, each equipped with multiple antennas. The system mutual information is first analyzed under the assumption of known channel state information (CSI), revealing that it is possible to maximize the information rate by designing properly the relay precoder as a block-diagonal matrix. Then, the maximum transmission rate issue is investigated under a total relay power constraint, leading to an optimal relaying scheme for moderate to high levels of total relay power. A simulation study is undertaken to show the effectiveness of the proposed solution.
引用
收藏
页码：229 / 231
页数：3
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