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Physical layer security for dual‐hop FSO/RF system using generalized ΓΓ/ η − μ fading channels
Author(s) -
Kumar Ambrish,
Garg Parul
Publication year - 2018
Publication title -
international journal of communication systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 1074-5351
DOI - 10.1002/dac.3468
Subject(s) - computer science , fading , physical layer , cumulative distribution function , computer network , transmission (telecommunications) , relay , secrecy , node (physics) , radio frequency , fading distribution , nakagami distribution , topology (electrical circuits) , probability density function , telecommunications , electronic engineering , wireless , physics , rayleigh fading , mathematics , electrical engineering , computer security , acoustics , channel (broadcasting) , statistics , engineering , power (physics) , quantum mechanics
Summary We investigate the physical layer security of decode‐and‐forward–relayed free space optics (FSO)/radio frequency (RF) communication system. In this network, the eavesdropper exists after relay node and overhears RF transmission. Further, FSO being a line‐of‐sight transmission is assumed to be secure from eavesdroppers. Here, we have the Gamma‐Gamma (ΓΓ) distribution for FSO link and generalized η − μ distribution for RF link. The security for information transmission to the legitimate user in the presence of an eavesdropper is measured in terms of secrecy capacity and secrecy outage probability. Deriving the probability density function and cumulative distribution function of end‐to‐end signal‐to‐noise ratio, the closed‐form expressions for security parameters are achieved. The numerical analysis of the proposed system is done under the influence of atmospheric turbulence effects and various fading conditions. The results have been verified through simulation.