Publications [#338946] of Lawrence Carin

Papers Published

1. Carin, L; Liu, H; Yoder, T; Couchman, L; Houston, B; Bucaro, J, Wideband time-reversal imaging of an elastic target in an acoustic waveguide., The Journal of the Acoustical Society of America, vol. 115 no. 1 (January, 2004), pp. 259-268 [1.1632482], [doi]
   (last updated on 2024/12/31)

   Abstract:
   Time-reversal is addressed for imaging elastic targets situated in an acoustic waveguide. It is assumed that the target-sensor range is large relative to the channel depth. We investigate the theory of wideband time-reversal imaging of an extended elastic target, for which the target dimensions are large relative to the principal wavelengths. When performing time-reversal imaging one requires a forward model for propagation through the channel, and the quality of the resulting image may be used as a measure of the match between the modeled and actual (measured) channel parameters. It is demonstrated that the channel parameters associated with a given measurement may be determined via a genetic-algorithm (GA) search in parameter space, employing a cost function based on the time-reversal image quality. Example GA channel-parameter-inversion results and imagery are presented for measured at-sea data.

   Keywords:
   Waveguides;Sensors;Image quality;Genetic algorithms;