How much feedback is multi-user diversity really worth?

被引：255

作者：

Gesbert, D ^{[1
]}

Alouini, MS ^{[1
]}

机构：

[1] Eurecom Inst, Sophia Antipolis, France

来源：

2004 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, VOLS 1-7 | 2004年

关键词：

D O I：

10.1109/ICC.2004.1312486

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

Wireless scheduling algorithms can extract multi-user diversity (MUDiv) via prioritizing the users with best current channel conditions. One drawback of MUDiv is the required feedback carrying the instantaneous channel rates from from all active subscribers to the access point/base station. This paper shows that this feedback load is, for the most part, unjustified. To alleviate this problem, we propose a technique allowing to dramatically reduce the feedback (by up to 90%) needs while preserving the essential of the scheme performance. We provide a theoretical analysis of the feedback load as function of the system's ergodic and outage capacity for both the traditional MUDiv scheme and the new scheme.

引用

页码：234 / 238

页数：5