A lower bound to the sum-rate of MIMO broadcast channels with limited-rate feedback

被引：4

作者：

Shao, Yubin ^{[1
]}

Yuan, Jinhong ^{[2
]}

机构：

[1] Kunming Univ Sci & Technol, Fac Informat Engn & Automat, Kunming 650051, Peoples R China

[2] Univ New S Wales, Sch Elect Engn & Telecommun, Sydney, NSW 2052, Australia

来源：

2008 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, PROCEEDINGS, VOLS 1-13 | 2008年

关键词：

D O I：

10.1109/ICC.2008.691

中图分类号：

TP3 [计算技术、计算机技术];

学科分类号：

0812 ;

摘要：

This paper investigates the sum-rate performance of a multiuser multi-antenna downlink system. Assuming limited channel state information at the base station and a large number of single antenna users in a cell, we investigate a semi-orthogonal user selection scheme with a total feedback rate constraint. The sum-rate performance of the proposed scheme is analyzed under zero-forcing linear precoder at base station, and a lower bound to the sum-rate of broadcast channels with quantized channel direction information and channel quality information is derived. This lower bound is used to evaluate the performance of broadcast channels with finite-rate feedback of channel state information and semi-orthogonal user selection. Numerical examples show that our analytical results agree with Monte Carlo simulations.

引用

页码：3674 / 3678

页数：5

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