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Multi-objective main lobe anti-interference method based on feature matrix joint diagonalization

A joint diagonalization and eigenmatrix technology, applied in radio wave measurement systems, instruments, etc., can solve untreated interference suppression problems and other problems

Inactive Publication Date: 2019-01-25
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

The document [Gaoming Huang, Lvxi Yang, Zhenya He. Blind sources separation used for radar anti-jamming. 2003 International Conference on Neural Networks & Signal Processing, 1382-1385, 2003] is the first paper at home and abroad to apply blind source separation to radar anti-jamming processing , using the Gaussian moment-based blind source separation algorithm to separate the interference signal from the target echo signal, but this method only models the presence of a single target, and does not deal with the interference suppression problem in the case of multiple targets

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  • Multi-objective main lobe anti-interference method based on feature matrix joint diagonalization
  • Multi-objective main lobe anti-interference method based on feature matrix joint diagonalization
  • Multi-objective main lobe anti-interference method based on feature matrix joint diagonalization

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Embodiment Construction

[0044] step 1:

[0045] There is a phased array radar array, the array radar transmit and receive co-located, set its x in the Cartesian coordinate system 0 ,y 0 At the position, the transceiver array is composed of M array elements, assuming that there are Q point targets in the detection area, which are located in the far field position xT1 ,y T1 ,...,x TQ ,y TQ , let the radar emission signal be s T t, the expression of the target echo signal received by the mth array element at time t is:

[0046]

[0047] Among them, α Tq ,q=1,2,...,Q is the complex amplitude of the qth target echo, which is affected by the target RCS, propagation path and other factors included in the radar equation. θ Tq is the azimuth angle of the qth target, is the propagation delay of the qth target, c=3×10 8 m / s is the electromagnetic wave propagation speed, d is the array element spacing, λ is the working wavelength, K is the total number of samples,

[0048] Assume that there are ...

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Abstract

The invention discloses a multi-objective main lobe anti-interference method based on feature matrix joint diagonalization, belongs to the technical field of radar anti-interference, and particularlyrelates to a multi-target blind source separation anti-main lobe interference method. The method comprises the steps of firstly, performing modeling under the condition that multiple objectives are disturbed by a main lobe; then, separating out an interference component and a target echo component by utilizing JADE; and finally, according to a matched filtering principle, enabling the target echocomponent obtained through blind source separation to pass through a matched filter, and finally inhibiting the interference to realize objective detection. The simulation shows the effectiveness of the method, and an algorithm does not need prior information of interference signals; various types of interferences can be inhibited; and therefore, the method has general applicability.

Description

technical field [0001] The invention belongs to the technical field of radar anti-jamming, in particular to a multi-target blind source separation anti-mainlobe jamming method. Background technique [0002] In modern electronic warfare, it has become a severe task for radar designers to do everything possible to improve the anti-jamming performance of radar. In order to improve the survivability of radar in complex electromagnetic interference environment, various anti-jamming measures such as ultra-low sidelobe, sidelobe concealment and sidelobe cancellation have been adopted. However, when the interference signal enters the radar antenna from the main lobe, it will seriously affect the detection performance of the radar, and the traditional sidelobe anti-interference measures will not be effective against the main lobe interference. Therefore, in order to ensure the correct detection and tracking of radar targets in complex electromagnetic environments, it is of great the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/36
CPCG01S7/36
Inventor 崔国龙葛萌萌时巧杨婧余显祥孔令讲杨晓波易伟张天贤
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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