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A Discrimination Method of Fully Polarized Active False Targets

A fully polarized and false target technology, applied to radio wave measurement systems, instruments, etc., can solve problems such as difficult to effectively identify false targets, and achieve the effect of reducing the difficulty of project implementation and low engineering cost

Active Publication Date: 2018-09-14
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to effectively identify this type of false target based only on the difference in the characteristics of the polarization domain, and no public literature has reported the identification method for this type of false target

Method used

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  • A Discrimination Method of Fully Polarized Active False Targets
  • A Discrimination Method of Fully Polarized Active False Targets
  • A Discrimination Method of Fully Polarized Active False Targets

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Embodiment Construction

[0047] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0048] figure 1 It is a schematic diagram of the signal processing flow of the method proposed in the present invention. As shown in the figure, after the broadband intermediate frequency signals received by the H channel and V channel are received synchronously, 2M sub-pulse echo signals need to be separated by digital frequency conversion filtering, and then 2M channels of data are output after matching filtering, and further non-phase Parameter accumulation and target detection, and then, for each detection result, its polarization characteristics are extracted and the attributes of true and false targets are identified.

[0049] figure 2 In order to use the method proposed by the invention to discriminate the effect of full polarization active false targets and real radar targets. A known:

[0050] a). The transmit sub-pulse waveform is a chirp ...

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Abstract

The invention provides a method of identifying a fully-polarized active false target based on a frequency diversity system. According to the technical scheme, the method comprises the following steps: after signals received by a channel H and a channel V of radar are synchronously sampled, 2M sub pulse echo signals are separated through digital variable-frequency filtering; then, 2M channels of data are output after matched filtering; and non-coherent integration and target detection are performed, the polarization characteristics of each detection result are extracted, and whether a target is true or false is identified. Based on a frequency diversity system, a radar target and the interference of a fully-polarized active false target can be effectively distinguished and identified by emitting multi-frequency signals and making use of the important characteristic that the polarization scattering property of a radar target is sensitive to the excitation frequency.

Description

technical field [0001] The invention belongs to the technical field of radar anti-jamming, and mainly relates to the identification problem of radar jamming to active false targets. Background technique [0002] Active false target jamming is an important radar deception jamming. By simulating target characteristics and transmitting false target signals, false targets appear on the radar to disrupt the intelligence radar's grasp of the air situation, or destroy radar tracking to disrupt the tracking and guidance radar's control of the air situation. Target tracking. [0003] The advanced active false target jamming signal can be almost completely consistent with the target echo signal in terms of waveform modulation, repetition period, Doppler frequency, track, and RCS (radar cross section) fluctuation characteristics. When the radar is difficult to use Domain, frequency domain, air domain, and modulation domain feature differences to identify and eliminate active false tar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/36G01S7/41
CPCG01S7/36G01S7/41
Inventor 施龙飞宗志伟李永祯王雪松李棉全杨勇马佳智毛楚乔张梦琪
Owner NAT UNIV OF DEFENSE TECH
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