A Cooperative Beamforming Scheme in MIMO Relay Broadcast Channels

被引：9
作者：
Zhou, Zhendong [1 ]
Vucetic, Branka [1 ,2 ]
机构：
[1] Univ Sydney, Telecommun Lab, Sydney, NSW 2006, Australia
[2] Univ Sydney, Sch Elect & Informat Engn, Sydney, NSW 2006, Australia
来源：
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS | 2011年 / 10卷 / 03期
基金：
澳大利亚研究理事会;
关键词：
Beamforming; broadcast channels; MIMO systems; relay; zero-forcing (ZF); DIVERSITY;
D O I：
10.1109/TWC.2011.011211.100752
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We consider relay broadcast channels (RBCs) with multiple antennas at all nodes. A practical linear precoding, relaying and combining scheme is proposed. Under an overall power constraint, we derive the optimal power allocation solution in a closed form. A low complexity beamforming vector optimization algorithm is proposed to maximize the effective channel gains and improve the system performance. Simulation results are presented for various channel configurations, which show that the proposed cooperative beamforming algorithm achieves performance very close to that of the exhaustive search algorithm but with a much lower complexity, and the maximum diversity gain is always attained.
引用
收藏
页码：940 / 947
页数：8
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