Performance analysis of physical layer security over Weibull/lognormal composite fading channel with MRC reception

With the advent of denser network and internet of things (loT) applications for fifth generation (5G) communication, there is a need to understand and define the security limitations. This paper proposes closed-form expressions for different physical layer security (PLS) metrics for millimeter wave (mmWave) communication for the 5G systems and loT applications. The information-theoretic formulation is considered in which licit users can impart their data over a quasi-static channel and eavesdroppers perceive their communication through another quasi-static channel, where the channel is represented as Weibull/lognormal (WL) composite fading channel in mmWave. To this end, the closed-form expressions for the probability of density function (PDF) and cumulative distribution function (CDF) are firstly derived. This set of results are then used to derive the closed-form expressions for the lower bound of secure outage probability (SOP S ) and strictly positive secrecy capacity (SPSC) with maximal ratio combining (MRC) reception. In addition, average secrecy capacity (ASC) is also analyzed and expressed in closed-form. Furthermore, the derivation is extended for the performance metrics for the two eavesdroppers case to provide perspective for more complex yet practical situation. (C) 2019 Elsevier GmbH. All rights reserved.