Iterative water-filling for Gaussian vector multiple-access channels

被引：617

作者：

Yu, W ^{[1
]}

Rhee, WJ

Boyd, S

Cioffi, JM

机构：

[1] Univ Toronto, Dept Elect & Comp Engn, Toronto, ON M5S 3G4, Canada

[2] ArryComm Inc, San Jose, CA 95131 USA

[3] Stanford Univ, Dept Elect Engn, Stanford, CA 94305 USA

来源：

IEEE TRANSACTIONS ON INFORMATION THEORY | 2004年 / 50卷 / 01期

基金：

美国国家科学基金会;

关键词：

channel capacity; convex optimization; Gaussian channels; multiuser channels; multiple-access channels; multiple-access communications; multiple-antenna systems; optimization methods; power control; water-filling;

D O I：

10.1109/TIT.2003.821988

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

This correspondence proposes an efficient numerical algorithm to compute the optimal input distribution that maximizes the sum capacity of a Gaussian multiple-access channel with vector inputs and a vector output. The numerical algorithm has an iterative water-filling interpretation. The algorithm converges from any starting point, and it reaches within 1/2 nats per user per output dimension from the sum capacity after just one iteration. The characterization of sum capacity also allows an upper bound and a lower bound for the entire capacity region to be derived.

引用

页码：145 / 152

页数：8

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