Efficient User Selection and Generalized Beamforming for Multi-user MIMO Downlink

被引：0
|
作者：
An, Liu [1 ]
Wu, Luo [1 ]
Xiang, Haige [1 ]
机构：
[1] Peking Univ, Sch EECS, Beijing 100871, Peoples R China
来源：
68TH IEEE VEHICULAR TECHNOLOGY CONFERENCE, FALL 2008 | 2008年
关键词：
Downlink; generalized beamforming; Multi-user MIMO systems; user selection; weighted sum-rate;
D O I：
暂无
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
It is difficult to implement optimal beamforming for multi-user multiple-input multiple-output (MIMO) downlink due to the high complexity. This paper proposes a low complexity generalized beamforming (GBF) scheme combined with an efficient user selection to maximize the weighted sum-rate. For each user, the outputs of the multiple antennas are combined with a receive GBF vector to create an equivalent multiple-input single-output (MISO) effective channel. First, user selection and receive GBF vectors are jointly optimized to construct a group of preferable effective channels. Then, transmit GBF vectors are obtained by zero-forcing over these effective channels. Simulation results show significant gain over currently known suboptimal schemes in various scenarios.
引用
收藏
页码：396 / 400
页数：5
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