%A Ying Ying-Zi(应英子), Ma Li(马力), and Guo Sheng-Ming(郭圣明) %T Adaptive and optimal detection of elastic object scattering with single-channel monostatic iterative time reversal %0 Journal Article %D 2011 %J Chin. Phys. B %R 10.1088/1674-1056/20/5/054301 %P 54301-054301 %V 20 %N 5 %U {https://cpb.iphy.ac.cn/CN/abstract/article_112866.shtml} %8 2011-05-15 %X 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.