Opportunistic beamforming with limited feedback

被引：36

作者：

Sanayei, Shahab ^{[1
]}

Nosratinia, Aria

机构：

[1] ArrayComm LLC, San Jose, CA 95131 USA

[2] Univ Texas, Richardson, TX 75083 USA

来源：

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS | 2007年 / 6卷 / 08期

关键词：

MIMO; multiuser diversity; opportunistic communication; limited feedback;

D O I：

10.1109/TWC.2007.05763

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 work investigates the following question: subject to strictly limited (finite-rate) feedback in a multi-user multi-antenna system, what channel state information (CSI) should we send back to the transmitter, and how should it be used? Considering the class of single-beam systems, we suggest a combination of beamforming (array gain) and multi-user diversity. It has been shown that in single antenna systems, one bit of feedback per user can capture almost all gains available due to multi-user diversity, therefore we propose and analyze a compound strategy that uses one bit for multi-user diversity and any further feedback bits for beamforming. We obtain the scaling laws of this compound strategy, showing that it scales as well as any single-beam system with full transmit-CSI.

引用

页码：2765 / 2771

页数：7

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