A 2D Non-Stationary Channel Model for Underwater Acoustic Communication Systems

TL;DR

This paper introduces a realistic, non-stationary wideband channel model for shallow water underwater acoustic communication, accounting for motion effects and ultra-wideband properties, validated with measurement data.

Contribution

It proposes a novel geometry-based stochastic model that captures non-stationarity and motion effects in shallow water UWA channels, supporting long-term simulations.

Findings

Model accurately mimics non-stationary UWA channels

Statistical properties like ACF and PDP are characterized

Validation confirms model's realism with measurement data

Abstract

Underwater acoustic (UWA) communication plays a key role in the process of exploring and studying the ocean. In this paper, a modified non-stationary wideband channel model for UWA communication in shallow water scenarios is proposed. In this geometry-based stochastic model (GBSM), multiple motion effects, time-varying angles, distances, clusters' locations with the channel geometry, and the ultra-wideband property are considered, which makes the proposed model more realistic and capable of supporting long time/distance simulations. Some key statistical properties are investigated, including temporal autocorrelation function (ACF), power delay profile (PDP), average delay, and root mean square (RMS) delay spread. The impacts of multiple motion factors on temporal ACFs are analyzed. Simulation results show that the proposed model can mimic the non-stationarity of UWA channels. Finally, the proposed model is validated with measurement data.