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Chin. Phys. B, 2011, Vol. 20(5): 054301    DOI: 10.1088/1674-1056/20/5/054301
CLASSICAL AREAS OF PHENOMENOLOGY Prev   Next  

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
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.
Keywords:  iterative time reversal      resonant scattering      echo enhancement  
Received:  04 February 2010      Revised:  24 December 2010      Accepted manuscript online: 
PACS:  43.30.+m (Underwater sound)  
Fund: Project supported by the Innovation Foundation of Chinese Academy of Sciences (Grant No. CXJJ-260).

Cite this article: 

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 2011 Chin. Phys. B 20 054301

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