Title :
Source localization by 2-D root-MUSIC with “scalar triads” of velocity-hydrophones
Author :
Wong, Kainam T. ; Zoltowski, Michael D.
Author_Institution :
Sch. of Electr. & Comput. Eng., Purdue Univ., West Lafayette, IN, USA
Abstract :
This paper introduces a new and computationally efficient direction finding (DF) algorithm that (1) exploits the velocity vector-field information of impinging wave front (vs. the scalar wavefield model using only pressure-hydrophones), (2) estimates both elevation angles and azimuth angles, (3) requires rooting only two polynomials and no costly iterative searches. This paper successfully adopts the Root-MUSIC algorithm to L-shaped arrays of arrays of co-located but orthogonally oriented velocity hydrophones. Each velocity hydrophone measures one Cartesian component of the acoustic velocity vector-wavefield. In one two-signal scenario, this new algorithm increases estimation accuracy by about 3 folds and lowers the resolution threshold by 25 dB SNR relative to a pressure-hydrophone array of comparable hardware and software complexity
Keywords :
acoustic wave velocity measurement; direction-of-arrival estimation; hydrophones; polynomials; sonar arrays; sonar signal processing; 2D Root MUSIC; acoustic velocity vector wavefield; azimuth angle; direction finding algorithm; elevation angle; polynomial rooting; scalar triad; source localization; velocity hydrophone array; Azimuth; Computational efficiency; Leg; Maximum likelihood estimation; Multiple signal classification; Phased arrays; Polarization; Polynomials; Sonar equipment; Voltage;
Conference_Titel :
Circuits and Systems, 1996., IEEE 39th Midwest symposium on
Conference_Location :
Ames, IA
Print_ISBN :
0-7803-3636-4
DOI :
10.1109/MWSCAS.1996.587831
