1 research outputs found
Effects of Eavesdropper on the Performance of Mixed {\eta}-{\mu} and DGG Cooperative Relaying System
Free-space optical (FSO) channel offers line-of-sight wireless communication
with high data rates and high secrecy utilizing unlicensed optical spectrum and
also paves the way to the solution of the last-mile access problem. Since
atmospheric turbulence is a hindrance to an enhanced secrecy performance, the
mixed radio frequency (RF)-FSO system is gaining enormous research interest in
recent days. But conventional FSO models except for the double generalized
Gamma (DGG) model can not demonstrate secrecy performance for all ranges of
turbulence severity. This reason has led us to propose a dual-hop eta-mu and
unified DGG mixed RF-FSO network while considering eavesdropping at both RF and
FSO hops. The security of these proposed scenarios is investigated in terms of
two metrics, i.e., strictly positive secrecy capacity and secure outage
probability. Exploiting these expressions, we further investigate how the
secrecy performance is affected by various system parameters, i.e., fading,
turbulence, and pointing errors. A demonstration is made between heterodyne
detection (HD) and intensity modulation and direct detection (IM/DD) techniques
while exhibiting superior secrecy performance for HD technique over IM/DD
technique. Finally, all analytical results are corroborated via Monte-Carlo
simulations