Opportunistic Fixed Gain Bidirectional Relaying with Outdated CSI

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations


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 This paper studies the impact of using outdated channel state information for relay selection on the performance of a network where two sources communicate with each other via fixed-gain amplify-and-forward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 It is shown that adding relays does not improve the performance if the channel is substantially outdated.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and it is shown that the performance can be improved by placing the relay closer to the source whose channel is more outdated.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.
Original languageEnglish (US)
Title of host publication2015 IEEE 81st Vehicular Technology Conference (VTC Spring)
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
ISBN (Print)9781479980888
StatePublished - May 2015

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01


Dive into the research topics of 'Opportunistic Fixed Gain Bidirectional Relaying with Outdated CSI'. Together they form a unique fingerprint.

Cite this