Title :
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.
fDate :
6/1/2007 12:00:00 AM
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;
Journal_Title :
Signal Processing, IEEE Transactions on
DOI :
10.1109/TSP.2007.893950
