Error Analysis of the Impulse Response on VCSEL-based Optical Wireless Communication Channel Using a Monte Carlo Ray-Tracing Algorithm

This article proposed a Monte Carlo ray-tracing method (MCRM) based on Gaussian beam emitter for optical wireless communication (OWC) channel estimation and established two typical indoor communication systems as uplink and full-link models. Formulas are given with targeted parameters for these two specific link models. The calculation results show that the impulse response of uplink models have twice larger and 10 ns faster than that of full-link models. Compared with the conventional Lambertian OWC systems, the Gaussian systems have larger impulse response and lower relative error, which indicates that Gaussian emitter is a promising candidate for indoor OWC system.