Statistical modeling and analysis of hybrid VLC/IRS-aided RF/THZ communication systems

Abstract

This thesis presents a comprehensive performance analysis of three hybrid communication systems designed to address the limitations of conventional indoor wireless technologies. The first system integrates a primary visible light communication (VLC) link with an intel-ligent reflecting surface (IRS)-aided radio frequency (RF) backup link. A hard-switching mechanism is employed, where in data transmission persists over the VLC channel until the signal-to-noise ratio (SNR) drops below a threshold, triggering a switch to the IRS-assisted RF link. Analytical models are derived for key performance metrics including outage prob-ability, outage capacity, and average bit error rate (BER), accounting for Lambertian radiation in VLC and Nakagami-m fading in RF. Monte Carlo simulations validate the theoretical expressions and demonstrate the robustness of the hybrid system over standalone VLC configurations.