Wideband time-reversal imaging of an elastic target in an acoustic waveguide.

Published

Journal Article

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.

Full Text

Duke Authors

Cited Authors

  • Carin, L; Liu, H; Yoder, T; Couchman, L; Houston, B; Bucaro, J

Published Date

  • January 2004

Published In

Volume / Issue

  • 115 / 1

Start / End Page

  • 259 - 268

PubMed ID

  • 14759019

Pubmed Central ID

  • 14759019

Electronic International Standard Serial Number (EISSN)

  • 1520-8524

International Standard Serial Number (ISSN)

  • 0001-4966

Digital Object Identifier (DOI)

  • 10.1121/1.1632482

Language

  • eng