On the Performance of Cooperative-Diversity Networks with the Nth Best-Relay Selection Scheme

被引：105

作者：

Ikki, Salama S. ^{[1
]}

Ahmed, Mohamed H. ^{[2
]}

机构：

[1] Univ Waterloo, Dept Elect & Comp Engn, Waterloo, ON N2L 3G1, Canada

[2] Mem Univ Newfoundland, Dept Elect & Comp Engn, St John, NF, Canada

来源：

IEEE TRANSACTIONS ON COMMUNICATIONS | 2010年 / 58卷 / 11期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Cooperative diversity; decode-and-forward; amplify-and-forward; Rayleigh fading; error performance; outage probability; PROBABILITY;

D O I：

10.1109/TCOMM.2010.092810.090322

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, we consider the adaptive decode-and-forward (DF) and amplify-and-forward (AF) cooperative-diversity systems with the N-th best-relay selection scheme. In the best-relay selection scheme, from the set of M relays the best relay only forwards the source signal to the destination. However, the best relay might be unavailable; hence we might resort to the second, third or generally the N-th best relay. We derive closed-form expressions for the symbol error probability, outage probability and asymptotic error probability. In particular, we derive a closed-form expression for the probability density function (PDF) of the signal-to-noise ratio (SNR) of the relayed signal at the destination node. Then, we find a closed-form expression for the moment generating function (MGF) of the output SNR at the destination. This MGF is used to derive the closed-form expressions of the performance metrics. All these expressions are derived over identical and non-identical Rayleigh fading channels. Results show that with the N-th best relay the diversity order is equal to (M - N + 2) where M is the number of relays.

引用

页码：3062 / 3069

页数：8

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