Opportunistic Fixed Gain Bidirectional Relaying with Outdated CSI

Khan, Fahd Ahmed; Tourki, Kamel; Alouini, Mohamed-Slim; Qaraqe, Khalid A.

Opportunistic Fixed Gain Bidirectional Relaying with Outdated CSI

Type

Conference Paper

Authors

Khan, Fahd Ahmed
Tourki, Kamel
Alouini, Mohamed-Slim

Qaraqe, Khalid A.

KAUST Department

Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Electrical Engineering Program
Communication Theory Lab

Date

2015-05

Abstract

In a network with multiple relays, relay selection has been shown as an effective scheme to achieve diversity as well as to improve the overall throughput. This paper studies the impact of using outdated channel state information for relay selection on the performance of a network where two sources communicate with each other via fixed-gain amplify-and-forward relays. For a Rayleigh faded channel, closed-form expressions for the outage probability, moment generating function and symbol error rate are derived. Simulations results are also presented to corroborate the derived analytical results. It is shown that adding relays does not improve the performance if the channel is substantially outdated. Furthermore, relay location is also taken into consideration and it is shown that the performance can be improved by placing the relay closer to the source whose channel is more outdated. © 2015 IEEE.

Citation

Khan, F. A., Tourki, K., Alouini, M.-S., & Qaraqe, K. A. (2015). Opportunistic Fixed Gain Bidirectional Relaying with Outdated CSI. 2015 IEEE 81st Vehicular Technology Conference (VTC Spring). doi:10.1109/vtcspring.2015.7145978