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Front. Inform. Technol. Electron. Eng.  2010, Vol. 11 Issue (5): 401-406    DOI: 10.1631/jzus.C0910212
    
Robust time reversal processing for active detection of a small bottom target in a shallow water waveguide
Xiang Pan1,2, Jian-long Li1,2, Wen Xu1,2, Xian-yi Gong1,2
1 Institute of Information and Communication Engineering, Zhejiang University, Hangzhou 310027, China 2 Zhejiang Provincial Key Laboratory of Information Network Technology, Hangzhou 310027, China
Robust time reversal processing for active detection of a small bottom target in a shallow water waveguide
Xiang Pan1,2, Jian-long Li1,2, Wen Xu1,2, Xian-yi Gong1,2
1 Institute of Information and Communication Engineering, Zhejiang University, Hangzhou 310027, China 2 Zhejiang Provincial Key Laboratory of Information Network Technology, Hangzhou 310027, China
 全文: PDF(219 KB)  
摘要： With the spatial-temporal focusing of acoustic energy, time reversal processing (TRP) shows the potential application for active target detection in shallow water. To turn the ‘potential’ into a reality, the TRP based on a model source (MS) instead of a physical probe source (PS) is investigated. For uncertain ocean environments, the robustness of TRP is discussed for the narrowband and broadband signal respectively. The channel transfer function matrix is first constructed in the acoustic perturbation space. Then a steering vector for time reversal transmission is obtained by singular value decomposition (SVD) of the matrix. For verification of the robust TRP, the tank experiments of time reversal transmission focusing and its application for active target detection are undertaken. The experimental results have shown that the robust TRP can effectively detect and locate a small bottom target.
关键词： Robustness;  Time reversal processing;  Bottom target detection;  Uncertain environment;  Sonar    
Abstract: With the spatial-temporal focusing of acoustic energy, time reversal processing (TRP) shows the potential application for active target detection in shallow water. To turn the ‘potential’ into a reality, the TRP based on a model source (MS) instead of a physical probe source (PS) is investigated. For uncertain ocean environments, the robustness of TRP is discussed for the narrowband and broadband signal respectively. The channel transfer function matrix is first constructed in the acoustic perturbation space. Then a steering vector for time reversal transmission is obtained by singular value decomposition (SVD) of the matrix. For verification of the robust TRP, the tank experiments of time reversal transmission focusing and its application for active target detection are undertaken. The experimental results have shown that the robust TRP can effectively detect and locate a small bottom target.
Key words: Robustness    Time reversal processing    Bottom target detection    Uncertain environment    Sonar
收稿日期: 2009-04-16 出版日期: 2010-04-28
CLC:  TB566  
基金资助: Project (Nos.  60702022 and 60872066) supported by the  National Natural Science Foundation of China
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Xiang Pan, Jian-long Li, Wen Xu, Xian-yi Gong. Robust time reversal processing for active detection of a small bottom target in a shallow water waveguide. Front. Inform. Technol. Electron. Eng., 2010, 11(5): 401-406.

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http://www.zjujournals.com/xueshu/fitee/CN/10.1631/jzus.C0910212    或    http://www.zjujournals.com/xueshu/fitee/CN/Y2010/V11/I5/401

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