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Micro moving false target generation method aiming at pulse Doppler radar

A pulse Doppler and false target technology, applied in the field of radar jamming, can solve the problems of being easily identified, generating false targets regardless of micro-motion characteristics, etc., achieving the effect of less resources and less system delay

Active Publication Date: 2017-02-15
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0005] The present invention proposes a micro-motion false target generation method for PD radar, which solves the problem that false targets are easily identified without considering their micro-motion characteristics in the existing methods

Method used

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  • Micro moving false target generation method aiming at pulse Doppler radar
  • Micro moving false target generation method aiming at pulse Doppler radar
  • Micro moving false target generation method aiming at pulse Doppler radar

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings.

[0031] figure 1 It is the flow chart of micro-moving false target generation for PD radar provided by the present invention. It includes two steps: the first big step is to obtain the false target modulation parameters, in which, according to the scattering center model and micro-motion mode (vibration, rotation or precession) of the false target to be simulated and f 0 , According to the mathematical derivation in the monograph "The Micro-Doppler Effect in Radar[M]" (ArtechHouse, 2011: pages 56-70), calculate the time t m =mT r To simulate the micro-Doppler frequency of each scattering center of the false target The second big step is to generate false target echo signals.

[0032] Figure 2 to Figure 4 It is the result of using the technical scheme provided by the invention to carry out MATLAB simulation experiment. In the experiment, it is assumed that the ...

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Abstract

The invention provides a micro moving false target generation method aiming at a pulse Doppler radar. The technical scheme comprises two steps of the first step, according to a scattering center model of a false target and a micro moving mode, calculating a false target modulation parameter in a DSP; and the second step, using the modulation parameter to carry out in-pulse modulation on an enemy PD radar signal intercepted by a jammer so as to generate a false target echo signal in FPGA. In an existing method, a micro moving characteristic is not considered during false target generation so that identification is easy. By using the method in the invention, the above problem is effectively solved.

Description

technical field [0001] The invention belongs to the technical field of radar jamming, in particular to a method for generating a micro-movement false target for PD (Pulse-Doppler, Pulse-Doppler) radar. Background technique [0002] PD radar has both the distance discrimination of pulse radar and the speed discrimination of continuous wave radar, and can obtain a large moving target echo processing gain in a strong clutter background, and has better anti-interference ability. Coherent jamming is the main active jamming method for PD radar. Coherent jamming uses DRFM (Digital Radio Frequency Memory, digital radio frequency memory) technology to sample, store and process radar signals, which can accurately replicate the pulse of radar signals. Information, so that it is coherent with the radar signal and enables the interference signal entering the radar receiver to obtain the same or similar processing gain as the real target echo signal. At present, the coherent interference...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/40
CPCG01S7/4052
Inventor 刘振隋金坪魏玺章
Owner NAT UNIV OF DEFENSE TECH
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