| CLASSICAL AREAS OF PHENOMENOLOGY |
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Adaptive and optimal detection of elastic object scattering with single-channel monostatic iterative time reversal |
| Ying Ying-Zi, Ma Li, Guo Sheng-Ming |
| Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China |
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Abstract In active sonar operation, the presence of background reverberation and the low signal-to-noise ratio hinder the detection of targets. This paper investigates the application of single-channel monostatic iterative time reversal to mitigate the difficulties by exploiting the resonances of the target. Theoretical analysis indicates that the iterative process will adaptively lead echoes to converge to a narrowband signal corresponding to a scattering object's dominant resonance mode, thus optimising the return level. The experiments in detection of targets in free field and near a planar interface have been performed. The results illustrate the feasibility of the method.
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Received: 04 February 2010
Revised: 24 December 2010
Published: 15 May 2011
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PACS:
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43.30.+m
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(Underwater sound)
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| Fund: Project supported by the Innovation Foundation of Chinese Academy of Sciences (Grant No. CXJJ-260). |
Cite this article:
Ying Ying-Zi, Ma Li, Guo Sheng-Ming Adaptive and optimal detection of elastic object scattering with single-channel monostatic iterative time reversal 2011 Chin. Phys. B 20 054301
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