Physical-Layer Security Over Non-Small-Scale Fading Channels

Abstract

This paper investigates the performances of securecommunications over non-small-scale fading channels. Specifically,considering three different cases when the main andeavesdropper channels experience independent lognormal fading,correlated lognormal fading, or independent composite fading, westudy the average secrecy capacity and secrecy outage [includingthe probability of nonzero secrecy capacity (PNSC) and secureoutage probability (SOP)] for these channel conditions. The approximatedclosed-form expressions for the average secrecy capacity,PNSC, and SOP are derived for these three different typesof non-small fading channels. The accuracy of our performanceanalysis is verified by simulation