A Vector-Hydrophone´s Minimal Composition for Finite Estimation-Variance in Direction-Finding Near/Without a Reflecting Boundary

Author

Ahmadi-Shokouh, Javad ; Keshavarz, Hengameh

Author_Institution

Dept. of Electr. & Comput. Eng., Waterloo Univ., Ont.

Volume

55

Issue

6

fYear

2007

fDate

6/1/2007 12:00:00 AM

Firstpage

2785

Lastpage

2794

Abstract

An underwater acoustic vector-hydrophone is composed of two or three spatially collocated but orthogonally oriented velocity-hydrophones, plus an optional collocated pressure-hydrophone. A minimum vector-hydrophone configuration is herein identified for finite-variance direction-finding by identifying the necessary and sufficient vector-hydrophone configuration nonsingularity in the Fisher Information Matrix. Three collocated velocity hydrophones are recommended for boundaryless direction-finding (one along the x-axis, y-axis, and z-axis), and a pressure hydrophone collocated with a collocated pair of x-axis and y-axis velocity hydrophones are recommended for direction finding near a rigid-boundary or pressure-release boundary

Keywords

acoustic signal processing; hydrophones; matrix algebra; underwater sound; Fisher information matrix; collocated pressure-hydrophone; direction finding; finite estimation-variance; reflecting boundary; rigid boundary; underwater acoustic vector hydrophone; Acoustic arrays; Acoustic sensors; Acoustic signal processing; Array signal processing; Direction of arrival estimation; Navigation; Sonar equipment; Sonar measurements; Underwater acoustics; Velocity measurement; Acoustic interferometry; acoustic signal processing; acoustic velocity measurement; array signal processing; direction-of-arrival estimation; sonar arrays; sonar signal processing; underwater acoustic arrays;

fLanguage

English

Journal_Title

Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1053-587X

Type

jour

DOI

10.1109/TSP.2007.893950

Filename

4203037