Impact of Outdated Relay Selection on the Capacity of AF Opportunistic Relaying Systems with Adaptive Transmission over Non-Identically Distributed Links

Author

Torabi, Mohammad ; Haccoun, David ; Frigon, Jean-François

Author_Institution

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

Volume

10

Issue

11

fYear

2011

fDate

11/1/2011 12:00:00 AM

Firstpage

3626

Lastpage

3631

Abstract

In this paper, we derive probability density function (PDF) and cumulative distribution function (CDF) expressions for the end-to-end signal-to-noise ratio (SNR) of an opportunistic relaying amplify-and-forward (AF) cooperative diversity system over independent and non-identically distributed (i.ni.d.) Rayleigh fading links where outdated channel state information (CSI) is used for relay selection. Based on these expressions, we derive the analytical capacity and outage probability expressions for four classical adaptive transmission techniques, namely, optimal power and rate adaptation (OPRA), constant power with optimal rate adaptation (ORA), channel inversion with fixed rate (CIFR) and truncated channel inversion with fixed rate (TIFR). Numerical evaluations results are presented showing the impact of relay selection with outdated CSI and i.ni.d. links on the performance of each adaptive transmission technique in AF opportunistic relaying systems.

Keywords

Rayleigh channels; amplify and forward communication; numerical analysis; probability; AF opportunistic relaying systems; CDF expressions; CIFR; CSI; OPRA; PDF; TIFR; adaptive transmission; adaptive transmission techniques; channel inversion with fixed rate; channel state information; cumulative distribution function expressions; end-to-end SNR; end-to-end signal-to-noise ratio; nonidentically distributed Rayleigh fading links; nonidentically distributed links; numerical evaluations; opportunistic relaying amplify-and-forward cooperative diversity system; optimal power and rate adaptation; outage probability expressions; outdated relay selection; probability density function; relay selection; truncated channel inversion with fixed rate; Adaptive systems; Channel capacity; Delays; Fading channels; Probability density function; Relays; Signal to noise ratio; AF opportunistic relaying; Adaptive transmission; cooperative networks; non-identically distributed links; outdated CSI;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/TWC.2011.092711.110136

Filename

6036014