Three dimensional higher-order raypath separation in a shallow-water waveguide
This addresses the challenge of raypath separation in ocean acoustics for applications like underwater communication or sensing, but it appears incremental as it builds on existing array configurations.
The paper tackled the problem of separating closely arriving raypaths in a multipath shallow-water environment by proposing a three-dimensional higher-order raypath separation algorithm, which achieved higher resolution and stronger robustness compared to existing methods in simulations and real data tests.
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.