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Detectability of low-level broad-band signals using adaptive matched-field processing with vertical aperture arrays

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4 Author(s)
Booth, N.O. ; Space & Naval Warfare Syst. Center, San Diego, CA, USA ; Abawi, A.T. ; Schey, P.W. ; Hodgkiss, W.S.

Alerted detection of low-level broad-band signals using adaptive matched-field processing (MFP) is illustrated in results from a shallow-water experiment carried out 12 km west of Point Loma, CA, in 200-m water of complex bathymetry. A 118-m vertical line array was deployed next to an identical line array tilted at 45 degrees. Array gain and signal excess for each of the arrays with linear and adaptive broad-band MFP is measured and compared using a low-level (118 dB//1 /spl mu/Pa/sup 2//Hz) broad-hand signal from a towed source. Surface/submerged classification was achieved at the minimum detectable level due to the depth resolution obtained with MFP. The results are compared qualitatively with adaptive plane-wave beamforming on a horizontal line array deployed nearby.

Published in:

Oceanic Engineering, IEEE Journal of  (Volume:25 ,  Issue: 3 )

Date of Publication:

July 2000

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