Journal Article

Secrecy outage probability of IRS‐aided VLC systems with power splitting

Sun, Jinyong, Zhao, Xiang, Zhang, Xinyuan, Liu, Maoyu

2024

Overview

An intelligent reflecting surface (IRS)‐aided visible light secure communication system is investigated. In order to improve its security performance, a power splitting scheme is adopted at the light‐emitting diodes. In contrast to most current research on the physical‐layer security in IRS‐aided visible light secure communication systems where secrecy rate or secrecy capacity maximization problems subject to various resource constraints were formulated, this letter takes the reliability of secure transmission into account. The closed‐form expression of secrecy outage probability is derived based on the statistical characteristics of the signal‐to‐noise ratio of the legitimate user, and the effects of light‐emitting diodes and IRS parameters and power splitting ratio on the secrecy outage probability are validated through simulations. Contrary to most research that primarily focuses on formulating secrecy rate or secrecy capacity maximization problems in intelligent reflecting surface‐assisted visible light secure communication systems, this study innovatively emphasizes the reliability of secure transmissions. To enhance security performance, a novel power splitting scheme is implemented at the light‐emitting diodes. Furthermore, the research derives a closed‐form expression for the secrecy outage probability based on the statistical characteristics of the legitimate user's signal‐to‐noise ratio, and it validates the impact of light‐emitting diode, intelligent reflecting surface parameters, and the power splitting ratio through comprehensive simulations.

• Subject: 5G mobile communication / reconfigurable architectures