Title :
Closed-form underwater acoustic direction-finding with arbitrarily spaced vector hydrophones at unknown locations
Author :
Wong, Kainam T. ; Zoltowski, Michael D.
Author_Institution :
Appl. Phys. Lab., Johns Hopkins Univ., Laurel, MD, USA
fDate :
10/1/1997 12:00:00 AM
Abstract :
This paper introduces a novel ESPRIT-based closed-form source localization algorithm applicable to arbitrarily spaced three-dimensional arrays of vector hydrophones, whose locations need not be known. Each vector hydrophone consists of two or three identical but orthogonally oriented velocity hydrophones plus one pressure hydrophone, all spatially co-located in a point-like geometry. A velocity hydrophone measures one Cartesian component of the incident sonar wavefield´s velocity vector, whereas a pressure hydrophone measures the acoustic wavefield´s pressure. Velocity-hydrophone technology is well established in underwater acoustics and a great variety of commercial models have long been available. ESPRIT is realized herein by exploiting the nonspatial interrelations among each vector hydrophone´s constituent hydrophones, such that ESPRIT´s eigenvalues become independent of array geometry. Simulation results verify the efficacy and versatility of this innovative scheme
Keywords :
digital simulation; direction-of-arrival estimation; eigenvalues and eigenfunctions; geophysical signal processing; hydrophones; position measurement; simulation; sonar arrays; sonar signal processing; Cartesian component; ESPRIT; arbitrarily spaced vector hydrophones; array geometry; direction of arrival; eigenvalues; orthogonally oriented velocity hydrophones; parameter estimation; point-like geometry; position measurement; pressure hydrophone; rotational invariance; simulation; sonar array; sonar signal processing; sonar wavefield; three-dimensional arrays; underwater acoustic algorithm; underwater acoustic direction-finding; underwater acoustics; vector hydrophones; velocity hydrophone; velocity vector; Acoustic measurements; Acoustic waves; Eigenvalues and eigenfunctions; Geometry; Navigation; Pressure measurement; Sonar equipment; Sonar measurements; Underwater acoustics; Velocity measurement;
Journal_Title :
Oceanic Engineering, IEEE Journal of