圆柱极化敏感阵列降维插值角度估计方法

doi:10.12305/j.issn.1001-506X.2023.09.02

Abstract

Abstract:

Cylindrical polarization sensitive array can directly use the array data on the same generatrix to estimate the elevation angle of the target, but it faces the unknown polarization problem when estimating the azimuth angle. In this paper, a reduced-dimension interpolation method is proposed to deal with the problem of two-dimensional direction-of-arrival (2D-DOA) estimation of cylindrical polarization sensitive array under unknown polarization. The proposed method firstly estimates the elevation angle through the rotation invariance of the generatrix array, then designs a reduced-dimension range of interest (ROI) using the estimated elevation angle, and finally obtains the corresponding azimuth estimation results by using the reduced-dimension interpolation method. Each element of the cylindrical antenna array only needs to be composed of an electric dipole, which effectively reduces the computational burden of the system and the mutual coupling effect between the elements. Numerical experiments verify the 2D-DOA estimation performance of the proposed method.

Key words: cylindrical polarization sensitive array, interpolation method, reduced-dimension range of interest (ROI), two-dimensional direction-of-arrival (2D-DOA) estimation

CLC Number:

TN911.7

Yili HU, Yongbo ZHAO, Sheng CHEN, Mei ZHANG, Ben NIU. Angle estimation method for cylindrical polarization sensitive array by reduced-dimension interpolation[J]. Systems Engineering and Electronics, 2023, 45(9): 2659-2666.

Figures/Tables 9

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References 29

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描述	符号	取值
波长/m	λ	0.03
阵元数	N	20
目标角度	(ϕ₀, θ₀)	(75°, 50°)
目标极化	(γ₀, η₀)	(20°, 30°)
快拍数	L	100
蒙特卡罗次数	H	100

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Angle estimation method for cylindrical polarization sensitive array by reduced-dimension interpolation

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