On the Performance of AF Opportunistic Relaying over Non-identically Distributed Links with Outdated CSI

Author

Torabi, Meysam ; Frigon, Jean-Francois ; Haccoun, David

Author_Institution

Dept. of Electr. Eng., Ecole Polytech. de Montreal, Montreal, QC, Canada

Volume

2

Issue

3

fYear

2013

fDate

Jun-13

Firstpage

359

Lastpage

362

Abstract

This paper presents an analysis of the performance of amplify-and-forward (AF) opportunistic relaying systems over independent and non-identically distributed (i.ni.d.) Rayleigh fading links with outdated channel state information (CSI). A closed-form expression is derived for the moment generating function (MGF) of the end-to-end SNR at the destination under outdated CSI conditions. Using that expression, closed-form expressions are derived for the average bit error rate (BER) performance of several M-ary modulations, and the average SNR gains obtained from AF opportunistic relaying. Asymptotic analyses for the BER and achievable diversity order of the system are also presented. Using the derived analytical expressions the deteriorating effects of outdated CSI and the differences over i.i.d. and i.ni.d. Rayleigh fading links are evaluated and discussed.

Keywords

Rayleigh channels; amplify and forward communication; channel estimation; error statistics; modulation; relay networks (telecommunication); AF opportunistic relaying system; BER; CSI; M-ary modulation; MGF; Rayleigh fading link; amplify-and-forward system; asymptotic analysis; bit error rate; diversity order; end-to-end SNR; moment generating function; nonidentically distributed link; outdated channel state information; AF opportunistic relaying; average BER performance; non-identically distributed links; outdated CSI;

fLanguage

English

Journal_Title

Wireless Communications Letters, IEEE

Publisher

ieee

ISSN

2162-2337

Type

jour

DOI

10.1109/WCL.2013.042313.120887

Filename

6512094