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

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 confir...

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Bibliographic Details
Published in:The Journal of the Acoustical Society of America 2014-04, Vol.135 (4), p.1800-1807
Main Authors: Yildiz, Selda, Roux, Philippe, Rakotonarivo, Sandrine T, Marandet, Christian, Kuperman, W A
Format: Article
Language:English
Subjects:
Engineering Sciences
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Summary: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.
ISSN:0001-4966
1520-8524
DOI:10.1121/1.4868362