Source localization with broad-band matched-field processing in shallow water

Author

Booth, Newell O. ; Baxley, Paul A. ; Rice, Joseph A. ; Schey, Phil W. ; Hodgkiss, William S. ; D´Spain, Gerald L. ; Murray, James J.

Author_Institution

RDT&E Div., Naval Command Control & Ocean Surveillance Center, San Diego, CA, USA

Volume

21

Issue

4

fYear

1996

fDate

10/1/1996 12:00:00 AM

Firstpage

402

Lastpage

412

Abstract

Acoustic source localization using matched-field processing is presented for multitone signals from the Shallow Water Evaluation cell Experiment 3 (SWellEX-3). The experiment was carried out in July 1994 west of Point Loma, CA, in 200 m of water of complex bathymetry. The multitone signal (ten tones between 50 and 200 Hz) was transmitted from an acoustic source towed at various depths over tracks which produced complex propagation paths to a vertical line array receiver. Broad-band and narrow-hand processing, localization, and tracking results are compared with each other and with independent estimates of source position. With narrow-band processing, mismatch between the data and the predicted signal replica of ~1 dB reduced the mainlobe to levels equal to or below the sidelobes. Incoherently averaging the processing output over the multiple tones reduced range/depth sidelobe levels, allowing accurate source localization and tracking

Keywords

acoustic correlation; acoustic signal processing; bathymetry; geophysical signal processing; oceanographic techniques; underwater sound; 200 m; 50 to 200 Hz; CA; July 1994; Point Loma; SWellEX-3; acoustic source localization; averaging; bathymetry; broad-band matched-field processing; broad-band processing; complex propagation paths; mainlobe; mismatch; multitone signals; narrow-hand processing; shallow water; sidelobes; tracking; vertical line array receiver; Acoustic propagation; Array signal processing; Extraterrestrial measurements; Narrowband; Position measurement; Predictive models; Sea measurements; Signal processing; Sonar equipment; Water resources;

fLanguage

English

Journal_Title

Oceanic Engineering, IEEE Journal of

Publisher

ieee

ISSN

0364-9059

Type

jour

DOI

10.1109/48.544051

Filename

544051