High SNR performance of amplify-and-forward relaying in Rayleigh fading wiretap channels
2013 (English)In: 2013 Iran Workshop on Communication and Information Theory, IWCIT 2013, IEEE , 2013, 6555771- p.Conference paper (Refereed)
This paper investigates amplify-and-forward (AF) relaying for secrecy in quasi-static Rayleigh fading channels. We consider a four-node network where a helping node intends to enhance secrecy of the transmission between the source and the destination in presence of a passive eavesdropper. In this scenario, the common assumption of full CSI on the eavesdropper's channels is not realistic, and thus, we study the performance of cooperation from an outage perspective. Starting from the secrecy outage probability, we introduce a novel measure, the conditional secrecy outage probability to analyze the performance of AF. In particular, we derive closed-form expressions for AF for these two secrecy measures under a high SNR assumption. Moreover, we use numerical examples to illustrate our results and to characterize the effect of the nodes' geometry. We also show numerically how AF improves the secrecy performance in comparison to direct transmission in terms of outage probability and secure throughput.
Place, publisher, year, edition, pages
IEEE , 2013. 6555771- p.
Amplify-and-forward relaying, Closed-form expression, Numerical example, Outage probability, Passive eavesdroppers, Quasi-static Rayleigh fading, Secrecy outage probabilities, Wire-tap channels
IdentifiersURN: urn:nbn:se:kth:diva-133860DOI: 10.1109/IWCIT.2013.6555771ISI: 000327098700024ScopusID: 2-s2.0-84881507908ISBN: 978-146735023-5OAI: oai:DiVA.org:kth-133860DiVA: diva2:663698
2013 Iran Workshop on Communication and Information Theory, IWCIT 2013; Tehran; Iran; 8 May 2013 through 9 May 2013
QC 201311122013-11-122013-11-112013-12-17Bibliographically approved