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Chaff jamming recognition method based on polarized feature vector

A polarization feature, chaff interference technology, applied in the field of radar, can solve problems such as poor robustness and robustness, reduce radar efficiency, complex expressions, etc., to improve robustness and robustness, improve efficiency, and calculate formulas simple effect

Active Publication Date: 2019-08-09
XIDIAN UNIV
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Problems solved by technology

The disadvantage of this method is that the proposed new identification method is only effective when identifying uniformly oriented chaff clouds, and the robustness and robustness of the new method for identifying chaff false targets are poor
The disadvantage of this method is that the two polarization discriminators selected based on the polarization scattering transformation and The expression of is relatively complicated, which reduces the efficiency of radar echo signal processing in the process of engineering processing

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  • Chaff jamming recognition method based on polarized feature vector
  • Chaff jamming recognition method based on polarized feature vector
  • Chaff jamming recognition method based on polarized feature vector

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Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0026] refer to figure 1 , to further describe in detail the specific implementation steps of the present invention.

[0027] Step 1, obtain the amplitude matrix of the echo signals of the three polarization channels of the target.

[0028] Using the absolute value abs function, the echo signal of each fast time in each slow time dimension of the horizontal polarization transmit-horizontal polarization receive channel is modulo-taken to obtain the amplitude vector of each slow time dimension echo signal, Composing the amplitude vectors of all slow time-dimensional echo signals in the echo signal into an amplitude matrix of the echo signal;

[0029] Using the absolute value abs function, the echo signal of each fast time in each slow time dimension of the vertical polarization transmission-vertical polarization reception channel is modulo-taken to obtain the...

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Abstract

The invention proposes a chaff jamming recognition method based on a polarized feature vector. The method comprises; step one, acquiring amplitude matrixes of three polarized channel echo signals of atarget; step two, generating a target polarization angle mean vector; step three, acquiring a target polarization feature vector; and step four, identifying the target. According to the invention, onthe basis of the difference of a chaff jamming signal and a ship target signal on polarized feature vectors, a chaff jamming signal at any orientation in space can be prevented effectively. The method can be applied to identification of chaff jamming resistance of an anti-ship missile, thereby realizing effective resistance of the novel vertically polarized chaff jamming signal by the anti-ship missile.

Description

technical field [0001] The invention belongs to the technical field of radar, and further relates to a chaff interference identification method based on a polarization eigenvector in the technical field of radar anti-jamming. The invention can be used for anti-chaff interference identification of anti-ship missiles, realizes effective countermeasures of anti-ship missiles against novel vertically polarized chaff interference, and calculates target polarization eigenvectors by obtaining the amplitude matrix of echo signals of each polarization channel of the target , using the difference between the chaff interference and the ship echo in the polarization eigenvector to achieve effective countermeasures against the chaff interference. Background technique [0002] Chaff in the mature stage, its radar cross-section (Radar Cross-Section, hereinafter referred to as RCS) is usually 2 to 3 times the RCS of the target to be attacked, which is very effective in protecting ships from...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/36G01S7/41G01S13/88
CPCG01S7/36G01S7/41G01S7/418G01S13/88
Inventor 刘峥焦丹丹张艳艳吕方方
Owner XIDIAN UNIV
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