Multiple Line Spectrum Interference Suppression-based Line Spectrum Detection of Moving Airborne Sound Source Underwater

doi:10.3969/j.issn.1000-1093.2020.09.019

Abstract

Abstract: A robust and reliable detection method based on multiple line spectrum interference suppression is proposed to solve the problem of strong underwater interference in the detection of moving airborne sound source underwater.The line spectrum of the received sound field is extracted，and then the spatial spectrum energy of each source being mainly from the contribution of one line spectrum is limited to suppress the interference energy of multiple line spectrum. Finally，the direction estimation is obtained by synthesizing all the line spectrum contributions. The effectiveness of the proposed method is verified through two underwater-to-air detection experiments. The results show that the method can be used to detect the line spectrum of moving airborne sound source underwater in the low SNR and multiple interferences environment，and effectively suppress the interference with the same or very similar frequency.

Key words: movingairbornesoundsource, multiplelinespectruminterferencesuppression, linespectrumdetection, underwater-to-airexperiment

CLC Number:

TB566

LIU Kaiyue， PENG Zhaohui， ZHANG Lingshan， WANG Guangxu， LI Shenghao. Multiple Line Spectrum Interference Suppression-based Line Spectrum Detection of Moving Airborne Sound Source Underwater[J]. Acta Armamentarii, 2020, 41(9): 1871-1879.

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