|Title||Target localization through a data-based sensitivity kernel: A perturbation approach applied to a multistatic configuration|
|Publication Type||Journal Article|
|Year of Publication||2014|
|Authors||Yildiz S., Roux P, Rakotonarivo S.T, Marandet C., Kuperman WA|
|Journal||Journal of the Acoustical Society of America|
|Type of Article||Article|
|Keywords||acoustic barrier; environment; high-frequency; scale; scattering; shallow-water; tomography; wave-guide|
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.