Active anti-interference method based on frequency control array phase center

A technology of phase center and frequency control array, which is applied in the field of active anti-jamming based on frequency control array phase center, which can solve the problems of being susceptible to interference changes and poor in coping

Pending Publication Date: 2021-04-06
AIR FORCE UNIV PLA
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  • Abstract
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Problems solved by technology

[0003] The invention provides an active anti-jamming method based on the phase center of the frequency control array, which solves the problem in the prior art that passive anti-jamming is performed on false targets, which is susceptible to interference changes and is difficult to deal with

Method used

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  • Active anti-interference method based on frequency control array phase center
  • Active anti-interference method based on frequency control array phase center
  • Active anti-interference method based on frequency control array phase center

Examples

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Embodiment 1

[0169] Simulation example: set the time fixed, the carrier frequency f 0 3GHz, maximum frequency deviation Δf max 10KHz, minimum frequency deviation Δf min is 0, the number of array elements Q is 10, the distance between array elements d is 0.05m, and the speed of light c is 3×10 8 m / s, the minimum deviation distance d of the phase center b is 100m, the penalty factor r is 109, the learning factors c1 and c2 are 2, the number of particles M is 50, the inertia weight ω is 0.8, the maximum number of iterations MaxDT is 500, the inspection interval DS is 10, and the positions of the target and the jammer are respectively (45°, 200km), (30°, 250km), Δf 1 =0, the maximum phase deviation of 119.567m is reached when the 297th iteration is performed. Frequency increment sequence Δf=(06.74494.39005.32902.83485.09957.11355.08524.20073.5184)KHz. Both are between the maximum frequency increment and the minimum frequency increment of the array, meeting the optimization requirements. ...

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Abstract

The invention discloses an active anti-interference method based on a frequency control array phase center. The method is specifically implemented according to the following steps of step 1, constructing a frequency control array radar system; step 2, deriving a phase center of the FDA radiation signal; step 3, controlling the phase center deviation by adjusting the frequency increment; and step 4, searching for the optimal frequency offset through an immune particle swarm optimization algorithm to maximize the phase center deviation. According to the method, the phase center deviation is maximum, the parameters are controllable, angle deception of an enemy jammer is achieved while the detection precision of the method is improved, and therefore active anti-interference based on the frequency control array phase center is achieved, a new thought is provided for radar countermeasure in electronic warfare, and compared with a traditional passive anti-interference method, the method has the advantages that positive defense of dominant confrontation is achieved, parameters are controllable, and the situation that interference changes and is limited to coping with is avoided.

Description

technical field [0001] The invention relates to radar signal processing technology, in particular to an active anti-jamming method based on frequency control array phase center. Background technique [0002] With the development of electronic countermeasure systems, especially the emergence and development of active jammers that can generate multi-dimensional and flexibly modulated deceptive jamming signals, they pose a serious threat to radar systems. Therefore, it is urgent to develop new radar anti-jamming technology. Due to the range-angle dependence of the beam in far-field conditions, the FDA is used to identify false targets at range. However, most of the existing technologies are passive anti-jamming to the generated false targets for a specific scene, and the passive anti-jamming is prone to passive situations that are affected by interference changes and are difficult to deal with. Contents of the invention [0003] The invention provides an active anti-jamming...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/02G01S7/36
CPCG01S13/02G01S7/36G01S2013/0245
Inventor 葛佳昂陈楚舒盛川谢军伟张浩为王博丁梓航
Owner AIR FORCE UNIV PLA
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