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

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...

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Bibliographic Details
Published in:IEEE journal of oceanic engineering 1996-10, Vol.21 (4), p.402-412
Main Authors: Booth, N.O., Baxley, P.A., Rice, J.A., Schey, P.W., Hodgkiss, W.S., D'Spain, G.L., Murray, J.J.
Format: Article
Language:English
Subjects:
Acoustic propagation
Array signal processing
Extraterrestrial measurements
Marine
Narrowband
Position measurement
Predictive models
Sea measurements
Signal processing
Sonar equipment
Water resources
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Summary: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 /spl sim/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.
ISSN:0364-9059
1558-1691
DOI:10.1109/48.544051