Three dimensional higher-order raypath separation in a shallow-water waveguide

TL;DR

This paper introduces a 3D higher-order raypath separation method for shallow-water environments, improving resolution and robustness in distinguishing closely arriving multipath signals using array configurations.

Contribution

The paper proposes a novel 3D higher-order raypath separation algorithm that outperforms existing methods in resolution and robustness in shallow-water multipath scenarios.

Findings

Achieves higher resolution in separating close raypaths.

Demonstrates robustness with real ocean shallow-water data.

Outperforms existing algorithms in tests.

Abstract

Separating raypaths in a multipath shallow-water environment is a challenge problem due to the interferences between them and colored noise existing in ocean environment, especially for two raypaths arrive close to each other. Thus, in this paper, a three dimensional (3D) higher-order raypath separation in an array to array configuration is proposed. Performance tests using simulation data in a multipath environment, real data obtained in an ultrasonic waveguide and ocean shallow-water data, respectively, illustrate that the proposed algorithm achieves a higher resolution and a stronger robustness comparing to the existing algorithms.