Title :
Target echo enhancement using a single-element time reversal mirror
Author :
Pautet, L. ; Tesei, A. ; Guerrini, P. ; Pouliquen, E.
Author_Institution :
NATO Undersea Res. Center, La Spezia
Abstract :
Iterative Time Reversal (TR) procedures have been demonstrated to be successful in detecting scatterers even in a highly reverberant environment. The success of the method is attributable to a Time Reversal Mirror (TRM) consisting of an array of transceivers that allows one to reconstruct and reverse-propagate wavefronts of interest. This paper deals with the limiting case of a TRM reduced to a single transceiver, tested using a tank experiment with three scattering objects in free-field conditions. It is shown that it is possible to excite a resonance between the TR operator and the strongest mode of the target in the bandwidth of insonification. A simple free-field scattering model is used to study the mechanisms of convergence and to drive the physics-based analysis of data
Keywords :
S-parameters; acoustic wave scattering; echo; sonar arrays; sonar detection; underwater sound; acoustic scattering; free-field scattering model; iterative time reversal; single-element time reversal mirror; sonar measurement; tank experiment; target echo enhancement; time reversal acoustics; transceiver array; underwater acoustics; underwater object detection; Acoustic scattering; Acoustic signal detection; Image reconstruction; Light scattering; Mirrors; Object detection; Testing; Transceivers; Transmission line measurements; Underwater acoustics; Acoustic scattering; sonar measurement; time reversal acoustics; underwater acoustics; underwater object detection;
Journal_Title :
Oceanic Engineering, IEEE Journal of
DOI :
10.1109/JOE.2005.862131
