Target localization through a data-based sensitivity kernel: A perturbation approach applied to a multistatic configuration

TitleTarget localization through a data-based sensitivity kernel: A perturbation approach applied to a multistatic configuration
Publication TypeJournal Article
Year of Publication2014
AuthorsYildiz S., Roux P, Rakotonarivo S.T, Marandet C., Kuperman WA
JournalJournal of the Acoustical Society of America
Volume135
Pagination1800-1807
Date Published2014/04
Type of ArticleArticle
ISBN Number0001-4966
Accession NumberWOS:000338307200021
Keywordsacoustic barrier; environment; high-frequency; scale; scattering; shallow-water; tomography; wave-guide
Abstract

A method to isolate the forward scattered field from the incident field on an object in a complex environment is developed for the purpose of localization. The method is based on a finite-frequency perturbation approach, through the measurement of a data-based sensitivity kernel. Experimental confirmation of the method is obtained using a cylindrical tank and an aggregate of ping-pong balls as targets surrounded by acoustic sources and receivers in a multistatic configuration. The spatial structure of the sensitivity kernel is constructed from field data for the target at a sparse set of positions, and compared with the expected theoretical structure. The localization of one or a few targets is demonstrated using the direct-path only. The experimental observations also show that the method benefits from including later arrivals from the tank wall and the bottom/surface reverberation, which indeed enhance the localization. (C) 2014 Acoustical Society of America.

DOI10.1121/1.4868362
Student Publication: 
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