Capacity bounds and power allocation for wireless relay channels

被引：763

作者：

Host-Madsen, A ^{[1
]}

Zhang, JS

机构：

[1] Univ Hawaii Manoa, Dept Elect Engn, Honolulu, HI 96813 USA

[2] Arizona State Univ, Dept Elect Engn, Tempe, AZ 85287 USA

来源：

IEEE TRANSACTIONS ON INFORMATION THEORY | 2005年 / 51卷 / 06期

基金：

美国国家科学基金会;

关键词：

channel capacity; cooperative diversity; ergodic capacity; power allocation; relay channel; wireless networks;

D O I：

10.1109/TIT.2005.847703

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

We consider three-node wireless relay channels in a Rayleigh-fading environment. Assuming transmitter channel state information (CSI), we study upper bounds and lower bounds on the outage capacity and the ergodic capacity. Our studies take into account practical constraints on the transmission/reception duplexing at the relay node and on the synchronization between the source node and the relay node. We also explore power allocation. Compared to the direct transmission and traditional multihop protocols, our results reveal that optimum relay channel signaling can significantly outperform multihop protocols and that power allocation has a significant impact on the performance.

引用

页码：2020 / 2040

页数：21

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