Visible to the public Physical Layer Security of a Two-Hop Mixed RF-FSO System in a Cognitive Radio Network

TitlePhysical Layer Security of a Two-Hop Mixed RF-FSO System in a Cognitive Radio Network
Publication TypeConference Paper
Year of Publication2019
AuthorsTorabi, Mohammad, Pouri, Alireza Baghaei
Conference Name2019 2nd West Asian Colloquium on Optical Wireless Communications (WACOWC)
Keywordsamplify and forward communication, asymmetric radio frequency link, atmospheric turbulence, average secrecy capacity, Capacity planning, Cognitive radio, Cognitive Radio Network, Cognitive Radio Security, cognitive-radio system, cooperative communication, dual-hop transmission, end-to-end signal-to-noise-ratio, free space optical link, FSO, FSO links, gamma distribution, Gamma-Gamma distribution, Interference, licensed primary user, Nakagami channels, optical links, physical layer security, physical layer security performance, probability, PU receiver, pubcrawl, Radio frequency, Rayleigh channels, Receivers, relay, relaying, Relays, resilience, Resiliency, RF links, secrecy outage probability, security, Signal to noise ratio, telecommunication network reliability, telecommunication security, two-hop mixed RF-FSO system, unlicensed secondary user
AbstractIn this paper, the physical layer (PHY)security performance of a dual-hop cooperative relaying in a cognitive-radio system in the presence of an eavesdropper is investigated. The dual-hop transmission is composed of an asymmetric radio frequency (RF)link and a free space optical (FSO)link. In the considered system, an unlicensed secondary user (SU)uses the spectrum which is shared by a licensed primary user (PU)in a controlled manner to keep the interference at PU receiver, below a predefined value. Furthermore, among M available relays, one relay with the best end-to-end signal-to-noise-ratio (SNR)is selected for transmission. It is assumed that all of the RF links follow Rayleigh fading and all of the FSO links follow Gamma-Gamma distribution. Simulations results for some important security metrics, such as the average secrecy capacity (SC), and secrecy outage probability (SOP)are presented, where some practical issues of FSO links such as atmospheric turbulence, and pointing errors are taken into consideration.
Citation Keytorabi_physical_2019