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Time-reversal imaging and classification for distant targets in a shallow water channel

Publication ,  Journal Article
Dasgupta, N; Carin, L
Published in: ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
October 7, 2004

Time-reversal imaging (TRI) is analogous to matched-field processing, although TRI is typically very wideband and is capable of performing target classification (in addition to localization). In this paper we apply the time-reversal technique to locate man-made cylindrical targets moving in a shallow ocean channel at long range, as well as to classify them from natural false targets like a school of fish. We present imaging and classification on simulated scattering data, for both target classes. In addition to the imaging, we explore extraction of features from the time-reversal data, with these applied to subsequent target classification. Time-reversal implementation requires a fast forward model, with that implemented here by a normal-mode model. In this paper, we present the underlying theory of TRI, feature extraction and target classification via a relevance vector machine (RVM).

Duke Scholars

Published In

ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings

ISSN

1520-6149

Publication Date

October 7, 2004

Volume

2
 

Citation

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ICMJE
MLA
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Dasgupta, N., & Carin, L. (2004). Time-reversal imaging and classification for distant targets in a shallow water channel. ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 2.
Dasgupta, N., and L. Carin. “Time-reversal imaging and classification for distant targets in a shallow water channel.” ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings 2 (October 7, 2004).
Dasgupta N, Carin L. Time-reversal imaging and classification for distant targets in a shallow water channel. ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings. 2004 Oct 7;2.
Dasgupta, N., and L. Carin. “Time-reversal imaging and classification for distant targets in a shallow water channel.” ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, vol. 2, Oct. 2004.
Dasgupta N, Carin L. Time-reversal imaging and classification for distant targets in a shallow water channel. ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings. 2004 Oct 7;2.

Published In

ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings

ISSN

1520-6149

Publication Date

October 7, 2004

Volume

2