Adaptive and optimal detection of elastic object scattering with single-channel monostatic iterative time reversal

doi:10.1088/1674-1056/20/5/054301

中国物理B ›› 2011, Vol. 20 ›› Issue (5): 54301-054301.doi: 10.1088/1674-1056/20/5/054301

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇下一篇

Adaptive and optimal detection of elastic object scattering with single-channel monostatic iterative time reversal

应英子, 马力, 郭圣明

Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China

收稿日期:2010-02-04 修回日期:2010-12-24 出版日期:2011-05-15 发布日期:2011-05-15
基金资助:
Project supported by the Innovation Foundation of Chinese Academy of Sciences (Grant No. CXJJ-260).

Adaptive and optimal detection of elastic object scattering with single-channel monostatic iterative time reversal

Ying Ying-Zi(应英子)^†, Ma Li(马力), and Guo Sheng-Ming(郭圣明)

Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China

Received:2010-02-04 Revised:2010-12-24 Online:2011-05-15 Published:2011-05-15
Supported by:
Project supported by the Innovation Foundation of Chinese Academy of Sciences (Grant No. CXJJ-260).

摘要/Abstract

摘要： 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.

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.

Key words: iterative time reversal, resonant scattering, echo enhancement

中图分类号: (Underwater sound)

43.30.+m

应英子, 马力, 郭圣明. Adaptive and optimal detection of elastic object scattering with single-channel monostatic iterative time reversal[J]. 中国物理B, 2011, 20(5): 54301-054301.

Ying Ying-Zi(应英子), Ma Li(马力), and Guo Sheng-Ming(郭圣明). Adaptive and optimal detection of elastic object scattering with single-channel monostatic iterative time reversal[J]. Chin. Phys. B, 2011, 20(5): 54301-054301.

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Adaptive and optimal detection of elastic object scattering with single-channel monostatic iterative time reversal

Adaptive and optimal detection of elastic object scattering with single-channel monostatic iterative time reversal

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