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Classification of distant targets situated near channel bottoms

Publication ,  Journal Article
Liu, H; Runkle, P; Carin, L; Yoder, T; Giddings, T; Couchman, L; Bucaro, J
Published in: Journal of the Acoustical Society of America
March 1, 2004

Identification algorithms are considered for a class of targets situated near the bottom of a water channel. It is assumed that the target-sensor distance relative to the channel depth is such that a ray-based representation of the scattered fields is appropriate (vis-à-vis a modal representation). Two approaches are considered for processing the scattered fields. In one algorithm a deconvolution is performed to remove the channel response, and thereby recover the free-field target scattered signature. In this case the classifier is trained based on free-field data. In the second approach the array receiver is employed to point the sensor in particular directions, and the beam-formed signal is used directly in the subsequent classifier. In this case the classifier must be trained based on. in-channel data. Multiple scattered signals are measured, from a sequence of target-sensor orientations, with the waveforms classified via a hidden Markov model. Example results are presented for scattering data simulated via the finite-element method and coupled to a normal-mode waveguide modal, for elastic targets situated in a water channel. © 2004 Acoustical Society of America.

Duke Scholars

Published In

Journal of the Acoustical Society of America

DOI

ISSN

0001-4966

Publication Date

March 1, 2004

Volume

115

Issue

3

Start / End Page

1185 / 1197

Related Subject Headings

  • Acoustics
 

Citation

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Liu, H., Runkle, P., Carin, L., Yoder, T., Giddings, T., Couchman, L., & Bucaro, J. (2004). Classification of distant targets situated near channel bottoms. Journal of the Acoustical Society of America, 115(3), 1185–1197. https://doi.org/10.1121/1.1643363
Liu, H., P. Runkle, L. Carin, T. Yoder, T. Giddings, L. Couchman, and J. Bucaro. “Classification of distant targets situated near channel bottoms.” Journal of the Acoustical Society of America 115, no. 3 (March 1, 2004): 1185–97. https://doi.org/10.1121/1.1643363.
Liu H, Runkle P, Carin L, Yoder T, Giddings T, Couchman L, et al. Classification of distant targets situated near channel bottoms. Journal of the Acoustical Society of America. 2004 Mar 1;115(3):1185–97.
Liu, H., et al. “Classification of distant targets situated near channel bottoms.” Journal of the Acoustical Society of America, vol. 115, no. 3, Mar. 2004, pp. 1185–97. Scopus, doi:10.1121/1.1643363.
Liu H, Runkle P, Carin L, Yoder T, Giddings T, Couchman L, Bucaro J. Classification of distant targets situated near channel bottoms. Journal of the Acoustical Society of America. 2004 Mar 1;115(3):1185–1197.

Published In

Journal of the Acoustical Society of America

DOI

ISSN

0001-4966

Publication Date

March 1, 2004

Volume

115

Issue

3

Start / End Page

1185 / 1197

Related Subject Headings

  • Acoustics