Copula based analysis of impact of wireless channels correlation on the physical layer security performances in a wireless wiretap channel with artificial noise

Abstract

In this article, a wireless wiretap channel with artificial noise assisted transmission and active eavesdropper is considered, where, wireless channel coefficients are correlated. Aiming at analyzing wireless channels correlation effects on the physical layer security, we exploit copula theory and obtain closed form expressions for the probability of positive secrecy rate, average secrecy rate, and generalized secrecy outage probability. Then, the obtained analytical results are evaluated numerically under positive dependence, independence and negative dependence correlation structures and it is shown that in different scenarios, the effect of correlated fading on the security performance can be beneficial or harmful.

Achievable secrecy rate analysis of OFDM‐based multi‐user untrusted relay networks with imperfect CSI

“…8,9 In this regard, multicarrier modulation (i.e., orthogonal frequency division multiplexing [OFDM] and orthogonal frequency division multiple access [OFDMA]) and physical-layer security techniques aim to fulfill communication and information security requirements in dense cellular wireless networks. [10][11][12][13] Moreover, in wireless communications, heterogeneous services might be desired, including uni-directional traffic (e.g., data collection from sensors in industrial settings) and bi-directional traffic (e.g., augmented-reality applications, remote control of robotic swarms). In such cases, communication reliability and latency performance can be significantly improved by wireless relays.…”