Selective Detection and Localization by Decomposition of a Subrank Time Reversal Operator
In this paper, a laboratory experiment for the detection and localization of targets using a subrank beam-based decomposition of the time reversal operator (DORT) method is presented.A rigid 32-element source-receiver array, connected to a programmable electronic system, was deployed in a 1.44-m-deep water tank.Eight snapshots, much less than the number of the array, were collected to construct a covariance matrix for replacing the time reversal operator.The experimental setup consisted of placing a non-pointlike scatterer and a pointlike scatterer at the same range but at different depths.It was shown that focusing is only achieved on each target at a frequency with a relatively large singular value.Due to the fact that the largest target is apparently stronger than the smallest one, the coupling between targets has a minor effect on the quality of the focusing or on the position of the largest target.The frequencies that can achieve good focusing occupancy are three fourths of the whole frequency band.However, the ratio is significantly decreased when the second singular vector is numerically backpropagated.
Decomposition of the time reversal operator Target detection Target localization Subrank time reversal operator Underwater acoustic signal processing
Chunxiao Li Mingfei Guo Huancai Lu
MOE Key Laboratory of Mechanical Manufacture and Automation, College of Mechanical Engineering, Zhej MOE Key Laboratory of Mechanical Manufacture and Automation, College of Mechanical Engineering, Zhej
国际会议
The 4th Pacific Rim Underwater Acoustics Conference (第四届环太平洋国际声学会议)
杭州
英文
111-118
2013-10-09（万方平台首次上网日期，不代表论文的发表时间）