基于插值拟合的抛面共形阵盲极化DOA估计

doi:10.12305/j.issn.1001-506X.2021.08.03

Abstract

Abstract:

The carrier curvature of the conformal array is complex, which leads to the variation of the pattern gains and the polarization characteristics of conformal array. The polarization components of common cylindrical arrays and conical arrays on the same generatrix are the same, but the curvature of the carrier of parabolic conformal arrays is variable. Therefore, the parameter estimation problem of parabolic conformal arrays needs to consider the influence of polarization components. As a result, it is impossible to directly obtain the two-dimensional direction of arrival (DOA) estimation for the target by the search-free algorithm. Firstly, a method of fitting the parabolic conformal array with polarization parameters to an array manifold with no polarization parameters through the idea of interpolation fitting is proposed. Then, the estimation of signal parameter via rotational invariance techniques (ESPRIT) method is used after reasonable selection of sub-array pairs for realizing blind polarization DOA estimation. At the same time, the Cramer-Rao bound (CRB) value is given after interpolation fitting. Finally, the simulation verifies the effectiveness of the method.

Key words: parabolic conformal array, interpolation fitting, blind polarization, two-dimensional direction of arrival (DOA) estimation

CLC Number:

TN911.7

Yili HU, Yongbo ZHAO, Sheng CHEN, Chenghu CAO. Blind polarization DOA estimation of parabolic conformal array based on interpolation fitting[J]. Systems Engineering and Electronics, 2021, 43(8): 2037-2044.

Figures/Tables 8

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[1]	Yili HU, Yongbo ZHAO, Sheng CHEN, Ben NIU. Decoherence of conformal electromagnetic vector sensor array by double interpolation fitting method [J]. Systems Engineering and Electronics, 2022, 44(8): 2393-2402.
[2]	TAN Weijie, FENG Xi’an. Sparsity-based two dimensional direction-finding method for parallel co-prime arrays [J]. Systems Engineering and Electronics, 2019, 41(5): 937-943.

Blind polarization DOA estimation of parabolic conformal array based on interpolation fitting

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