Outage analysis and optimal power allocation for multinode relay networks

被引：126

作者：

Seddik, Karim G. ^{[1
]}

Sadek, Ahmed K.

Su, Weifeng

Liu, K. J. Ray

机构：

[1] Univ Maryland, Dept Elect & Comp Engn, College Pk, MD 20742 USA

[2] Univ Maryland, Syst Res Inst, College Pk, MD 20742 USA

[3] SUNY Buffalo, Dept Elect Engn, Buffalo, NY 14260 USA

来源：

IEEE SIGNAL PROCESSING LETTERS | 2007年 / 14卷 / 06期

关键词：

amplify-and-forward protocol; outage probability; wireless relay networks;

D O I：

10.1109/LSP.2006.888424

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：

In this letter, a novel approach for outage probability analysis of the multinode amplify-and-forward relay network is provided. It is shown that the harmonic mean of two exponential random variables can be approximated, at high signal-to-noise ratio (SNR), to be an exponential random variable. The single relay case considered before is a special case of our analysis. Based on that approximation, an outage probability bound is derived which proves to be tight at high SNR. Based on the derived outage probability bound, optimal power allocation is studied. Simulation results show a performance improvement, in terms of symbol error rate, of the optimal power allocation compared to the equal power-allocation scheme.

引用

页码：377 / 380

页数：4

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