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Joint Estimation Method of Direction of Arrival and Polarization Parameters of Cold Array Based on Resampling

A polarization parameter and joint estimation technology, which is applied in the field of radar array signal processing, can solve the problems of DOA estimation performance degradation, etc., and achieve the effects of reducing the order of root polynomials, improving the accuracy of parameter estimation, and reducing the amount of computation

Active Publication Date: 2022-03-04
XIDIAN UNIV
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Problems solved by technology

[0003] But in the case of low signal-to-noise ratio, the DOA estimation performance of the above method is severely degraded.

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  • Joint Estimation Method of Direction of Arrival and Polarization Parameters of Cold Array Based on Resampling
  • Joint Estimation Method of Direction of Arrival and Polarization Parameters of Cold Array Based on Resampling
  • Joint Estimation Method of Direction of Arrival and Polarization Parameters of Cold Array Based on Resampling

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[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0024] The embodiment of the present invention provides a method for joint estimation of DOA and polarization parameters of COLD array based on resampling, refer to figure 1 , the method includes the steps of:

[0025] Step 1, establish a three-dimensional spatial coordinate system OXYZ, place M uniformly distributed COLD array elements on the X axis, and the M uniformly distributed COLD array elements form a COLD array, such as figure 2 Shown; Obtain the ra...

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Abstract

The invention belongs to the technical field of radar array signal processing, and discloses a method for jointly estimating direction-of-arrival and polarization parameters of a COLD array based on resampling. The method mainly solves the problems of huge amount of computation in the prior art and a large decrease in parameter estimation accuracy under low signal-to-noise ratio. The main idea is: pre-estimate the range of the incoming wave direction and polarization parameters, and combine it with resampling, so that the estimated values ​​of the parameters after resampling are normal values, and there are no abnormal values. Each group of resampling selects the optimal pseudo-noise weight. The present invention can avoid spectral peak search, reduce polynomial order of root-finding, reduce calculation amount and hardware complexity, and greatly improve DOA and polarization parameter estimation performance under low signal-to-noise ratio. The disadvantages of spectral peak search are the large amount of computation and the performance of parameter estimation is severely degraded under low signal-to-noise ratio.

Description

technical field [0001] The invention belongs to the technical field of radar array signal processing, in particular to a resampling-based COLD (Co-centered orthogonal loop and dipole, concentric orthogonal electromagnetic vector sensor) array wave arrival direction and polarization parameter joint estimation method, which is applied to In Parameter Estimation for Polarization Sensitive Array Radar. Background technique [0002] Polarization-sensitive arrays have time, space, and polarization multi-dimensionality, and can make use of the inherent properties and propagation information of signals to a greater extent. They can be applied to radars. For polarization-sensitive array direction of arrival (DOA) estimation, many DOA estimation methods for sensitive arrays have been proposed, such as multiple signal classification (MUSIC), subspace rotation invariant (ESPRIT), maximum likelihood (ML), ROOT-MUSIC, parameter estimation methods based on cumulants, etc. However, the tra...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 陶海红马慧慧
Owner XIDIAN UNIV
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