Matched-impulse-response processing for shallow-water localization and geoacoustic inversion
In this paper, impulse response matching is proposed for source localization and environmental inversion. The ocean impulse response is estimated using a cross-correlation procedure applied to data from the propagation of a broadband pulse in a shallow-water environment. Source localization and geoacoustic parameter estimation are then performed through time-domain correlations between the estimated impulse responses at spatially separated phones and synthetic replica impulse responses. The method is both spatially and temporally coherent. Parameter space search uses a hierarchical scheme designed to exploit the sensitivity of the acoustic field to the unknown parameters. Tested on the SWellEX-96 and synthetic data, the proposed method is shown to be more robust than conventional (linear), incoherent, broadband matched field processing.
Michalopoulou
ZH
Department of Mathematical Sciences and Center for Applied Mathematics and Statistics, New Jersey Institute of Technology, Newark 07102, USA.