基于声能流矢量补偿的水下目标高精度DOA估计

doi:10.16180/j.cnki.issn1007-7820.2020.08.006

Abstract

Abstract:

Aiming at the problem that the anisotropic noise seriously interferes with the accuracy of underwater target DOA estimation, this paper proposed a high-precision DOA estimation method for underwater targets based on acoustic energy flux vector compensation. The method was based on the joint information processing technology of sound pressure and particle velocity, and the anisotropic noise source distribution model was obtained while effectively reducing the influence of isotropic noise. The anisotropic noise was vector compensated according to the anisotropic noise field acoustic energy flow model, which further suppressed the anisotropic noise and achieved the purpose of high-precision estimation. The numerical simulation results showed that below 20 dB the accuracy of the method was higher than that of DOA estimate of conventional complex intensity processor with the highest precision increased by 21%.

Key words: vector hydrophone, complex intensity processor, multi-target DOA estimation, anisotropic noise, acoustic energy flux, high-precision DOA estimation

CLC Number:

TN911.6

BAI Xingyu,OU Hongfei,JIANG Yu,REN Longping. High-precision DOA Estimation of Underwater Targets Based on Acoustic Energy Flux Vector Counteraction[J].Electronic Science and Technology, 2020, 33(8): 34-39.

Figures/Tables 8

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Table 1

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High-precision DOA Estimation of Underwater Targets Based on Acoustic Energy Flux Vector Counteraction

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目标信号入射角θ/(°)	目标方位估计值/(°)
	常规复声强器DOA估计		基于AEFVC的DOA估计
	SNR=0 dB	SNR=30 dB	SNR=0 dB	SNR=30 dB
40	42	40	41	40
90	89	89	90	90
200	196	199	198	200

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