NDLI: Time-reversal based detection of buried objects in waveguide environments

Content Provider	IEEE Xplore Digital Library
Author	Xiang Pan Hui Shu Yuanxin Xu Nan Wang
Copyright Year	2012
Description	Author affiliation: Institute of Information and Communication Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, PRC (Xiang Pan; Hui Shu; Yuanxin Xu; Nan Wang)
Abstract	For improvement of detection of a buried object in shallow water, a robust time reversal detection approach is proposed. Time reversal processing (TRP) is commonly applied for signal enhancement in a homogenous medium. In this paper, time reversal focusing in non-homogenous media is theoretically analyzed based on a wave propagation equation. From the perspective of beamforming, TRP is equivalent to active matched field processing (MFP). It is necessary to consider the robustness of TRP in an uncertain environment. Thus an optimum algorithm with multiple constraints is combined with the TRP scheme for designing time reversal beams to ensonify a target of interest. The tank experimental results verify the theoretical analysis of time reversal focusing in layered media. The proposed time reversal processing scheme works well in detection of a buried object in a waveguide tank. Moreover, by robust time reversal we can achieve a processing gain of 11.8 dB.
Starting Page	1119
Ending Page	1123
File Size	161953
Page Count	5
File Format	PDF
ISBN	9781467317436
e-ISBN	9781467317443
DOI	10.1109/ICACI.2012.6463347
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-10-18
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Array signal processing Oceans Focusing Media Robustness Acoustics Buried object detection
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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