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Journal of Marine Science and Application[ISSN:1002-2848/CN:61-1400/f]

卷:

期数:

2012年2

页码:

251-257

栏目:

出版日期:

2012-06-25

Info

Title:

Short Baseline Positioning with an Improved Time Reversal Technique in a Multi-path Channel

Author(s):

Zhuang Li;  Gang Qiao;  Zongxin Sun;  Haiyang Zhao and Ran Guo

Affilations:

Author(s):

Zhuang Li;  Gang Qiao;  Zongxin Sun;  Haiyang Zhao and Ran Guo

College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin 150001, China

Keywords:

short baseline positioning;  focusing gain;  time reversal mirror;  multi-path channel;  ocean acoustic channel;  acoustic signal processing

分类号:

-

DOI:

10.1007/s11804-012-1130-5

Abstract:

The existence of a multi-path channel under the water greatly decreases the accuracy of the short baseline positioning system. In this paper, the application of a time reversal mirror to the short baseline positioning system was investigated. The time reversal mirror technique allowed the acoustic signal to better focus in an unknown environment, which effectively reduced the expansion of multi-path acoustic signals as well as improved the signal focusing. The signal-to-noise ratio (SNR) of the time reversal operator greatly increased and could be obtained by ensonifying the water. The technique was less affected by the environment and therefore more applicable to a complex shallow water environment. Numerical simulations and pool experiments were used to demonstrate the efficiency of this technique.

References:

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Memo

Memo:

Supported by the National Defense Basic Foundation of China B2420710007.

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Last Update: 2012-06-07