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Noise suppression method based on inhomogeneous space solid array distributed SAR (Specific Absorption Rate)

A spatial three-dimensional, clutter suppression technology, applied in radio wave measurement systems, radio wave reflection/re-radiation, utilization of re-radiation, etc., can solve the problem that the STAP method is only suitable for non-uniform space array clutter suppression and so on

Inactive Publication Date: 2012-11-21
HARBIN INST OF TECH
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing STAP method is only suitable for the clutter suppression of uniform linear arrays or uniform planar arrays, but not suitable for the clutter suppression of non-uniform spatial arrays, and provides a method based on non-uniform spatial stereo Clutter Suppression Method for Array Distributed SAR

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  • Noise suppression method based on inhomogeneous space solid array distributed SAR (Specific Absorption Rate)
  • Noise suppression method based on inhomogeneous space solid array distributed SAR (Specific Absorption Rate)
  • Noise suppression method based on inhomogeneous space solid array distributed SAR (Specific Absorption Rate)

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specific Embodiment approach 1

[0013] Specific implementation mode one : the clutter suppression method based on the non-uniform space three-dimensional array distributed SAR of the present embodiment, its specific process is as follows:

[0014] Step 1. According to the actual spatial distribution of the non-uniform distributed SAR, a non-uniform spatial three-dimensional array manifold based on the X-Y-Z coordinate system is established;

[0015] Step 2, using the secondary array interpolation signal reconstruction method based on pitch dimension division, to perform signal reconstruction on the non-uniform space three-dimensional array manifold established in step one, and obtain the uniform space three-dimensional array manifold;

[0016] Step 3. According to the uniform space three-dimensional array manifold obtained in step two, calculate and obtain the Doppler frequency of each dimension of the clutter, and then obtain the clutter model of the uniform space three-dimensional array manifold;

[0017...

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Abstract

The invention relates to a noise suppression method based on an inhomogeneous space solid array distributed SAR (Specific Absorption Rate), belonging to a noise suppression method and solving the problem that the traditional STAP (Space-Time Adaptive Processing) method is only suitable for noise suppression of a homogeneous linear array or homogeneous area array but not suitable for noise suppression of an inhomogeneous space array. The method comprises the steps of: firstly, establishing an inhomogeneous space solid array manifold; secondly, carrying out signal reconfiguration on the inhomogeneous space solid array manifold to obtain a homogeneous space solid array manifold; thirdly, computing and obtaining various dimensions of Doppler frequencies of noises according to the homogeneous space solid array manifold to obtain a noise model based on the homogeneous space solid array manifold; and fourthly, constructing full time space self-adaptive filter according to the noise model, various dimensions of Doppler frequencies and a full time space self-adaptive processing method. The invention overcomes the defects of the prior art, and can be used for noise suppression field in the SAR ground moving target detection technology.

Description

technical field [0001] The invention relates to a clutter suppression method. Background technique [0002] Clutter suppression is a key link in GMTI (Ground Moving Target Detection) technology. The existing STAP (Space-Time Adaptive Processing) technology is widely used in clutter suppression, and it has good clutter cancellation performance. However, the traditional 2D-STAP technology based on a uniform line array assumes that the clutter environment is uniform, which requires that the interference in the training samples and the samples to be tested be independent and identically distributed, so that samples from other range gates can be used to accurately estimate The statistical characteristics of the interference in the range gate to be detected can effectively suppress the interference such as clutter. [0003] However, the actual clutter environment faced by radar is often non-uniform, and the traditional STAP method cannot effectively suppress the non-uniform clutt...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/02G01S13/90
Inventor 刘梅张雷林超陈锦海张生杰
Owner HARBIN INST OF TECH
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