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