Discussion about the Superdirective Beamforming Theory and Methods of Circular Acoustic Sensor Arrays

WANG Yong; YANG Yi-xin; MA Yuan-liang

doi:10.11993/j.issn.2096-3920.2017.04.001

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WANG Yong, YANG Yi-xin, MA Yuan-liang. Discussion about the Superdirective Beamforming Theory and Methods of Circular Acoustic Sensor Arrays[J]. Journal of Unmanned Undersea Systems, 2017, 25(新刊4): 297-309. doi: 10.11993/j.issn.2096-3920.2017.04.001

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WANG Yong, YANG Yi-xin, MA Yuan-liang. Discussion about the Superdirective Beamforming Theory and Methods of Circular Acoustic Sensor Arrays[J]. Journal of Unmanned Undersea Systems, 2017, 25(新刊4): 297-309. doi: 10.11993/j.issn.2096-3920.2017.04.001

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Discussion about the Superdirective Beamforming Theory and Methods of Circular Acoustic Sensor Arrays

doi: 10.11993/j.issn.2096-3920.2017.04.001

School of Marine Science and Technology, Northwestern Polytechnical University, Xi′an 710072, China

Received Date: 2017-09-20
Rev Recd Date: 2017-10-16
Publish Date: 2017-10-31

Abstract

Abstract

To solve the contradiction between size and spatial directivity of sensor array due to space limitation of the carrier, such as unmanned undersea system, the supedirective beamforming methods were proposed to provide high directivity for a size-limited sensor array. This paper introduces the research background and history of superdirectivity, and presents the confronted problems and corresponding countermeasures. These superdirective beamforming methods can be classified into two main types, i.e., gain-maximation and beam pattern synthesis. Then, the common supedirective beamforming methods specially for circular acoustic sensor arrays are discussed in detail, and based on the above two main types, they are further categorized into the phase-mode method, the difference-based method, the eigen-beam decomposition and synthesis method, and the eigen-decomposition-based beam pattern synthesis method. The corresponding basic principles, merits and demerits, application ranges, relationship between each other and some related experimental results of these superdirective beamforming methods are analyzed to give a comprehensive presentation of the superdirective beamforming methods for circular acoustic sensor arrays, and to provide guidelines for related research and application.
- unmanned undersea system,
- superdirectivity,
- acoustic sensor,
- circular array

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References

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Discussion about the Superdirective Beamforming Theory and Methods of Circular Acoustic Sensor Arrays

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