Physical Layer Security over Fluctuating Two-Ray Fading Channels

TL;DR

This paper analyzes the physical layer security of millimeter wave communications over fluctuating two-ray fading channels, deriving analytical expressions for key security metrics and validating the impact of channel parameters.

Contribution

It provides the first comprehensive analysis of PHY-security over FTR fading channels with new analytical expressions for security metrics.

Findings

Derived closed-form expressions for secrecy capacity and outage probability.

Validated the impact of channel parameters on security performance.

Numerical results demonstrate the effectiveness of the analytical models.

Abstract

Ensuring the physical layer security (PHY-security) of millimeter wave (mmWave) communications is one of the key factors for the success of 5G. Recent field measurements show that conventional fading models cannot accurately model the random fluctuations of mmWave signals. To tackle this challenge, the fluctuating two-ray (FTR) fading model has been proposed. In this correspondence, we comprehensively analyze the PHY-security in mmWave communications over FTR fading channels. More specifically, we derive analytical expressions for significant PHY-security metrics, such as average secrecy capacity, secrecy outage probability, and the probability of strictly positive secrecy capacity, with simple functions. The effect of channel parameters on the PHY-security has been validated by numerical results.