A generalized beamformer for tracking tonal sources

Author

Desharnais, F. ; Matthews, M. N R ; Ebbeson, G.R. ; Heard, G.J. ; Brooke, G.H. ; Thomson, D.J.

Author_Institution

Defence R&D Canada-Atlantic, Dartmouth, NS

fYear

2006

fDate

18-21 Sept. 2006

Firstpage

1

Lastpage

5

Abstract

A generic matched-field processor is used to track tonal sources recorded on an L-shape array deployed on the seafloor in St. Margaret´s Bay, Nova Scotia, Canada. The replicas are computed using a normal mode summation based on the Zhang and Tindle model for isovelocity water over an attenuating fluid bottom. The model uses an effective depth approximation to solve for the modes, which makes the code computationally efficient. Localization accuracy for frequencies in the 100- to 300-Hz range was estimated for this environment using known signals from a towed source

Keywords

geophysical signal processing; hydrophones; seafloor phenomena; target tracking; underwater sound; 100 to 300 Hz; Canada; L-shape array; Nova Scotia; St. Margaret´s Bay; Zhang-Tindle model; depth approximation; fluid bottom; generalized beamforming technique; generic matched-field processor; isovelocity water; seafloor; tonal sources tracking; Acoustic arrays; Acoustic emission; Acoustic signal detection; Research and development; Sea surface; Signal processing; Solid modeling; Sonar equipment; Testing; Water resources;

fLanguage

English

Publisher

ieee

Conference_Titel

OCEANS 2006

Conference_Location

Boston, MA

Print_ISBN

1-4244-0114-3

Electronic_ISBN

1-4244-0115-1

Type

conf

DOI

10.1109/OCEANS.2006.306918

Filename

4099073