Work

A method of reference phase velocity selecting for bearing estimation with a horizontal line array in shallow water

Year: 2025

Type: article

Abstract: In shallow water environments, choosing an appropriate reference phase velocity for direction-of-arrival estimation with a beamformed underwater horizontal line array is very important. The direction of the maximum beamformer output power will deviate from the true source bearing when a mismatched reference phase velocity was used. This Letter analyzed the intrinsic relationship between the reference phase velocity and normal mode amplitude distribution, source bearing, array aperture, and then proposed a multi-parameter weighted reference phase velocity selection method, which has improved the accuracy of source bearing estimation. Numerical simulation and experimental results validated the effectiveness of this method.

Source: JASA Express Letters

DOI: 10.1121/10.0035934

Authors: Dai Liu, Feilong Zhu, Yanjun Zhang, Zhaohui Peng

Institutions: Chinese Academy of Sciences, Institute of Acoustics, State Key Laboratory of Acoustics

Language: English

Topic: Direction-of-Arrival Estimation Techniques

Subfield: Signal Processing

Field: Computer Science

Domain: Physical Sciences

Open Access status: diamond

Funder: National Natural Science Foundation of China

Award: G2009855738