TIME REVERSAL ITERATION FOR ELASTIC OBJECT DETECTION, CLASSIFICATION AND ECHO ENHANCEMENT

Abstract: In this paper, a method is introduced for elastic object detection, classification and echo enhancement with a single transceiver. Iterative time reversal will gradually cause echo waves to converge to a single frequency signal, which corresponds to a resonance mode of the elastic object, and this intrinsic frequency can be used for target classification, and the return level is enhanced compared to the echo of the first iteration. Tank experiment is performed with an aluminium ball as the target, and the results illustrate the feasibility of the method