Monte-Carlo based non-line-of-sight underwater wireless optical communication channel modeling and system performance analysis under turbulence

TL;DR

This paper develops a Monte Carlo simulation-based channel model for non-line-of-sight underwater wireless optical communication, incorporating sea surface reflection, particle scattering, and turbulence effects, to improve system performance analysis.

Contribution

It introduces a comprehensive Monte Carlo-based channel model with a novel weighted double gamma function for NLOS UWOC, accounting for turbulence and complex underwater effects.

Findings

The proposed model accurately characterizes the channel impulse response.

Analysis of bit error rate under turbulence conditions.

Performance evaluation framework for NLOS UWOC systems.

Abstract

Compared with line-of-sight (LOS) communication, nonline-of-sight (NLOS) underwater wireless optical communication (UWOC) systems have garnered extensive attention because of their heightened suitability for the intricate and dynamic underwater environment. In the NLOS channel, photons can reach the receiver by sea surface reflection or particle scattering. However, research lacks comprehensive channel models that incorporate sea surface reflection and particle scattering. Moreover, the presence of ocean turbulence introduces random fluctuations in the received optical signal based on the average light intensity. Consequently, this paper adopts the Monte Carlo simulation method (MCS) to solve the fading-free impulse response of the joint reflection-scattering channel. Furthermore, a weighted double gamma function (WDGF) is proposed to characterize the channel impulse response (CIR). Based on the closed CIR model, the average bit error rate and the performance of the interruption probability of the UWOC system under turbulence are analyzed. The conclusions obtained are intended to assist in the design and performance evaluation of NLOS UWOC systems.