A Study on Multi-Path Channel Response of Acoustic Propagation in Northwestern Arabian Sea

Gang Qiao,Muhammad Aatiq,Asim Ismail

doi:10.19026/rjaset.5.4293

Abstract

Multi-path interference due to boundary reflection and variation of sound speed profile in underwater water acoustic communication pose the major barrier to reliable high-speed underwater communication system. Based on the sound speed profiles and the bathymetry data of northwestern Arabian Sea, Multipath impulse response profiles of the area have been obtained using Bellhop. The derived parameters like delay structure, effective transmit and receive angles suitable depths etc. from the obtained impulse responses have also been discussed. The impulse responses have been obtained for different scenarios of transmitter and receiver geometry to arrive at optimal configuration of wireless Acoustic communication/telemetry system for that area. This work can be used as a guide for the practical design of underwater acoustic wireless communication/telemetry system to be operated in this area which is critical to world oil exports.

Highlights

With the increasing requirement of communication and ocean exploitation in the recent years, there has been a growing interest in the Under Water Acoustic (UWA) communications in various application areas such as telemetry, remote control, speech, or image transmission etc
Compared with EM environment, shallow and deep water acoustic channels are characterized by extended multi-path, limited bandwidth and spatial/temporal variability
Multipath propagation is of particular concern in horizontal underwater Acoustic Communication links, where it results in very long channel response spanning up to several tens of symbol intervals

Summary

Introduction

With the increasing requirement of communication and ocean exploitation in the recent years, there has been a growing interest in the Under Water Acoustic (UWA) communications in various application areas such as telemetry, remote control, speech, or image transmission etc. The second important parameter that affects the multipath impulse profile is the bathymetry of that area where the acoustics communication is taking place. The following figure (Fig. 5) gives us the propagation paths of the transmission and suggests us to use the depth of around 400 m for the other modem to be deployed.

Results

Conclusion