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International Telecommunication Networks and Applications Conference (ITNAC)

Performance analysis of physical layer security over independent/correlated log-normal fading channels

Xv Zhang, Gaofeng Pan, Chaoqing Tang, Tingting Li, Ying Weng

Published Nov 1, 2014• 10 citations
Publisher

Abstract

In this paper, we analyze the performance of the physical layer security for the classic Wyner's three-node model (including an eavesdropper) over independent/correlated lognormal fading channels. Considering the cases where the main and eavesdropper channels experience independent/correlated log-normal fading, we study the average secrecy capacity and secrecy outage (including the probability of non-zero secrecy capacity and secure outage probability), respectively. The approximated closed-form expressions for the average secrecy capacity, the probability of non-zero secrecy capacity, and secure outage probability have been derived for independent/correlated lognormal fading channels, respectively. Finally, the accuracy of our performance analysis is verified by simulation results.

DOI
10.1109/atnac.2014.7020868

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On Physical Layer Security of α\alphaα -η\etaη -κ\kappaκ -μ\muμ Fading Channels
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This paper studies performance analysis of physical layer security in a Rayleigh fading wiretap channel, where, the main (transmitter-to-legitimate receiver) and eavesdropper (transmitter-to-eavesdropper) channel coefficients are correlated. By exploiting the novel approach called Copula theory, we derive closed-form expressions for average secrecy capacity (ASC), secrecy outage probability (SOP), and secrecy coverage region (SCR). Moreover, to more evaluate the impact of channel correlation, the asymptotic behavior of SOP in high signal-to-noise ratio (SNR) regime and other scenarios is studied, and finally, the analytical results are illustrated numerically under the positive dependence, independence, and negative dependence structures. Based on the insights from this analysis, we found that the effect of correlated fading on the performance of physical layer security can be helpful or harmful in different scenarios, depending on the structure of dependency between the main and eavesdropper channels.