End-to-end performance of transmission systems with relays over Rayleigh-Fading channels

被引：1020

作者：

Hasna, MO ^{[1
]}

Alouini, MS

机构：

[1] Univ Qatar, Dept Elect Engn, Doha, Qatar

[2] Univ Minnesota, Dept Elect & Comp Engn, Minneapolis, MN 55455 USA

来源：

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS | 2003年 / 2卷 / 06期

基金：

美国国家科学基金会;

关键词：

bit-error rate (BER); collaborative/cooperative diversity; harmonic mean; outage probability; Rayleigh fading; transmission with relays;

D O I：

10.1109/TWC.2003.819030

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：

End-to-end performance of two-hops wireless comnumication systems with nonregenerative relays over flat Rayleigh-fading channels is presented. This is accomplished by deriving and applying some new closed-form expressions for the statistics of the harmonic mean of two independent exponential variates. It is shown that the presented results can either be exact or tight lower bounds on the performance of these systems depending on the choice of the relay gain. More specifically, average bit-error rate expressions for binary differential phase-shift keying, as well as outage probability formulas for noise limited systems are derived. Finally, comparisons between regenerative and nonregenerative systems are presented. Numerical results show that the former systems clearly outperform the latter ones foe low average signal-to-noise-ratio (SNR). They also show that the two systems have similar performance at high average SNR.

引用

页码：1126 / 1131

页数：6