RUAN Yidi1,2 PAN Xiang1 LI Jianlong1 GONG Xianyi1,3 

(1 Department of Information Science and Electronic Engineering, Zhejiang University Hangzhou 310027 )

(2 China Mobile Communications Corporation Zhejiang Company Limited Hangzhou 310006)

(3 Hangzhou Applied Acoustics Research Institute  Hangzhou 310012 )

Received Jun. 4, 2008

Revised Aug. 29, 2008

Abstract The target detection and localization in uncertain environment with robust time reversal (TR) technique was investigated. TR is a physical process as well as a method of signal processing. Therefore, it is natural to perform beamforming via TR, i.e., TR beamforming (TRBF). To reduce the effects of environmental uncertainty on TR spatio-temporal focusing, transmitting TRBF with modeled instead of physical probe source was studied and robust minimum-variance receiving TRBF with diagonal loading was put forward. Both of them were applied to the detection and distance estimation of the target, which was dealt with in a waveguide experiment. The experimental results show that validity of the methods in uncertain environment. 

PACS numbers: 43.60, 43.30