COLD array arrival direction and polarization parameter joint estimation method based on resampling

A direction of arrival and joint estimation technology, applied in the field of radar array signal processing, can solve problems such as the degradation of DOA estimation performance, and achieve the effect of reducing the order of the root polynomial, improving the estimation performance, and avoiding spectral peak search.

Active Publication Date: 2018-08-17
XIDIAN UNIV
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[0003] But in the case of low signal-to-noise ratio, the DO...

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  • COLD array arrival direction and polarization parameter joint estimation method based on resampling
  • COLD array arrival direction and polarization parameter joint estimation method based on resampling
  • COLD array arrival direction and polarization parameter joint estimation method 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 COLD array arrival direction and polarization parameter joint estimation method based on resampling. Theproblems of large computation load and greatly reduced parameter estimation precision under low signal to noise ratio in the prior art are solved. According to the main idea, the range of the incomingwave direction and polarization parameters is pre-estimated and combined with resampling, so that resampled parameter estimation values are normal values rather than abnormal values; a pseudo noise adding method is changed; and the optimal pseudo noise weight is selected for each group of resampling. According to the invention, spectrum peak search can be avoided; the root polynomial order is reduced; the computation load and the hardware complexity are reduced; the arrival direction and polarization parameter estimation performance under low signal to noise ratio is greatly improved; and thedisadvantages of large computation load and severely reduced parameter estimation performance under low signal to noise ratio, which are caused by spectrum peak search in the prior art, are overcome.

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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IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 陶海红马慧慧
Owner XIDIAN UNIV
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