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A Geometry Calibration Technique for Hydrophone Array with Sources in Near Field

College of Underwater Acoustic Engineering and Science and Technology on Underwater Acoustic Laboratory, Harbin Engineering University, Harbin 150001, P. R. China

E-mail Address: zounan@hrbeu.edu.cn

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Yan Wang

College of Underwater Acoustic Engineering and Science and Technology on Underwater Acoustic Laboratory, Harbin Engineering University, Harbin 150001, P. R. China

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Jin Fu

College of Underwater Acoustic Engineering and Science and Technology on Underwater Acoustic Laboratory, Harbin Engineering University, Harbin 150001, P. R. China

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, and

Guolong Liang

College of Underwater Acoustic Engineering and Science and Technology on Underwater Acoustic Laboratory, Harbin Engineering University, Harbin 150001, P. R. China

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https://doi.org/10.1142/S0218396X15400081Cited by:2 (Source: Crossref)

Abstract

A new algorithm involving flank array geometry calibration under strong multipath conditions is proposed to address the problem of installation errors and the shell deformation. The derived linear mapping relationship between geometric error of sensors and signal eigenvector reduces the calculating difficulty in near calibration mode. By regarding the reflection as coherent visual sources in known position, the compensation strategy of strong multipath matching is put forward. Cramer–Rao bound (CRB) analysis for the calibration mode is employed. Numerical simulations and lake trials verify the efficiency of the proposed algorithm and illustrate the performance improvement under strong multipath conditions.

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