Robust MMSE Beamforming for Multiuser MISO Systems With Limited Feedback

被引：51
|
作者：
Zhang, Caihua [1 ]
Xu, Wei [1 ]
Chen, Ming [1 ]
机构：
[1] Southeast Univ, Natl Mobile Commun Res Lab, Nanjing 210096, Jiangsu Prov, Peoples R China
来源：
IEEE SIGNAL PROCESSING LETTERS | 2009年 / 16卷 / 07期
关键词：
Limited feedback; minimum mean square error beamforming; multiuser MISO systems; robust;
D O I：
10.1109/LSP.2009.2020455
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：
This letter considers minimum mean square error beamforming (MMSEBF) for the downlink of a multiuser multiple-input single-output (MISO) system with limited feedback, where the transmitter only has quantized information regarding the direction of the channel. We present an improved approach which is robust to the channel uncertainties arising from the quantization errors and the lack of channel magnitude information. Simulation results show that the proposed robust MMSEBF scheme provides improved performance over the conventional beamforming schemes in limited feedback systems.
引用
收藏
页码：588 / 591
页数：4
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