Multi-radar countermeasure method and system based on virtual channelization

A virtual channel and multi-radar technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as overall complexity increase and instability, and achieve the effect of improving the countermeasure effect and multi-radar countermeasure performance

Active Publication Date: 2020-07-17
BEIJING AEROSPACE INST OF THE LONG MARCH VEHICLE
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Problems solved by technology

Therefore, multiple channels need to be set up, resulting in an increase in overall complexity
And when the signal frequency is between adjacent channels, both channels...

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  • Multi-radar countermeasure method and system based on virtual channelization
  • Multi-radar countermeasure method and system based on virtual channelization
  • Multi-radar countermeasure method and system based on virtual channelization

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[0048] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0049] see figure 1 , is a flowchart of a multi-radar countermeasure method based on virtual channelization according to a preferred embodiment of the present invention. like figure 1 As shown, the multi-radar countermeasure method based on virtual channelization provided by this embodiment includes the following steps:

[0050] First, in ...

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Abstract

The invention relates to a multi-radar countermeasure method and system. The method comprises the steps of carrying out the frequency division of a received radar radio frequency signal, obtaining a frequency division intermediate frequency signal after the frequency division of the received radar radio frequency signal and a frequency division local oscillator signal, carrying out the frequency detection of the pulse front edge of the frequency division intermediate frequency signal, and obtaining a pulse starting frequency; performing broadband and narrowband judgment on the frequency division intermediate frequency signal of the radar signal to obtain a broadband and narrowband judgment result of the broadband signal or the narrowband signal; calculating the center frequency of the broadband signal for the broadband signal according to the broadband and narrowband judgment result; determining a local oscillation signal frequency range of the narrow-band signal according to the pulsestarting frequency and switching to the corresponding local oscillation signal according to the broadband and narrowband judgment result; for the broadband signal, determining the frequency range ofa local oscillation signal according to the center frequency of the broadband signal and switching to the corresponding local oscillation signal; and mixing the local oscillator signal and the radar radio frequency signal to generate an intermediate frequency radar signal, and generating a radar interference signal according to the intermediate frequency radar signal.

Description

technical field [0001] The invention relates to electronic radar countermeasure technology, in particular to a multi-radar countermeasure method and system based on virtual channelization. Background technique [0002] With the development of high-resolution broadband imaging radars, networked radars, dual multistatic radars and distributed coherent radars, the working modes and signal forms of radars are diversified, which makes the electromagnetic environment faced by active electronic interference more and more serious. complex. [0003] Traditional jamming countermeasures are insufficient in countering multiple radars. For example, multi-radar countermeasures generally use channelized detection to guide local oscillator selection. In this method, each channel covers a certain frequency band. In order to deal with multi-radar, the general channel coverage bandwidth is relatively narrow, about 100MHz or less, so multiple channels are required to cover the entire frequency...

Claims

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Application Information

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IPC IPC(8): G01S7/38
CPCG01S7/38
Inventor 刘佳琪高路白锦良江志烨秦鹏刘洪艳李虎曹阳刘成国徐锋王上月张然陈姝媛郭磊孙恒郑沛王超张昕雨孙瑞祺徐子为郝鑫赵忠凯高敬鹏梁伟周宏潮刘雪梅
Owner BEIJING AEROSPACE INST OF THE LONG MARCH VEHICLE
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