Novel Target Direction-of-arrival Estimation Method for Underwater Small-scale Moving Array

doi:10.3969/j.issn.1000-1093.2017.09.015

Abstract

Abstract: The underwater small-scale moving array is limited by its small aperture and sample size for direction of arrival (DOA) estimation of coherent target. The passive synthetic aperture technique is used to solve the problem of insufficient aperture. The spectral separation of sample covariance matrix is stu-died in the case of coherent target. A DOA estimation method for coherent target based on main feature space is proposed, which uses small snapshots. In the simulation, the proposed method can still distinguish the four targets correctly when the ratio of the number of sensors to the number of samples is 5; in the water tank experiment, the above ratio is 4.8, and it can identify three adjacent targets clearly. The proposed method can achieve better resolution for coherent targets in small samples, which meets the application needs of small-scale motions array of targeting, and requires no priori information of signal source number.Key

Key words: acoustics, small-scalemovingarray, mainfeaturespace, DOAestimation, smallsnapshot

CLC Number:

TB566

GUO Tuo, WANG Ying-min, ZHANG Li-chen. Novel Target Direction-of-arrival Estimation Method for Underwater Small-scale Moving Array[J]. Acta Armamentarii, 2017, 38(9): 1779-1785.

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第38卷
第9期2017 年9月兵工学报ACTA
ARMAMENTARIIVol.38No.9Sep.2017

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