Abstract
The T-matrix methods have been successfully employed for underwater acoustical imaging techniques and the inverse analysis of acoustic scattering problems. Most inverse techniques use the backscattering signals in the acoustical far field to retrieve the shape and size information of an underwater object, such as the ramp response technique. This paper addresses a modified ramp response technique, which could be used to reconstruct the 3D image of an object for the bistatic case. This technique shows that the bistatic ramp response is proportional to the profile function of an underwater object based on the small bistatic angle assumption. The numerical examples demonstrate that the bistatic ramp response technique is still valid to obtain an excellent profile function even for the bistatic case with a fairly big bistatic angle. This bistatic ramp response technique allows us to reconstruct the 3D image of an underwater object with only one receiver.
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