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

Separating raypaths in a multipath shallow-water environment is a challenge due to the interferences between them and the colored noise that exists in an ocean environment, especially for two raypaths that 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 compared to the existing algorithms. (c) 2022 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

Automated summary

In this paper, a three-dimensional (3D) higher-order raypath separation method is proposed for separating raypaths in a multipath shallow-water environment. The proposed algorithm addresses the challenges of interference and colored noise between raypaths, especially for closely arriving raypaths. Performance tests using simulation data, real data, and ocean shallow-water data demonstrate that the proposed algorithm achieves higher resolution and stronger robustness compared to existing algorithms.