Intermittent sampling forwarding interference suppression method based on cognitive radar waveform

A technology of cognitive radar and forwarding interference, applied to radio wave measurement systems, instruments, etc., can solve problems such as target detection performance degradation, and achieve the effect of improving detection performance

Active Publication Date: 2017-11-07
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0005] The present invention provides a method for suppressing intermittent sampling and forwarding interference based on cognitive radar waveform design. The method estimates the sampling pulse width and forwarding period of intermittent sampling and forwarding interference based on the chirp signal emitted by cognitive radar, and then according to the estimated Sampling pulse width and forwarding cycle transmit specific intra-pulse FM signal, and finally remove the interference part in the radar echo signal, which can effectively solve the problem of real target detection performance degradation when suppressing intermittent sampling and forwarding interference

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  • Intermittent sampling forwarding interference suppression method based on cognitive radar waveform
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  • Intermittent sampling forwarding interference suppression method based on cognitive radar waveform

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[0031] The present invention will be further described below in conjunction with the accompanying drawings.

[0032] figure 1 It is a flow chart of the intermittent sampling and forwarding interference suppression method based on cognitive radar waveform design, including two steps: the first step is the estimation of intermittent sampling and forwarding interference parameters, mainly including ① transmitting chirp signals, ② receiving interference echo signals, and ③ interference There are three sub-steps in parameter estimation; the second step is intermittent sampling and forwarding interference suppression, which mainly includes three sub-steps: ① generating and transmitting intra-pulse FM signals, ② receiving interference echo signals, and ③ interference suppression. The splicing process refers to removing the discrete points whose discrete signal is zero, for example, the signal [0,1,0,0,1,2,0,3] is spliced ​​and the result is [1,1,2,3].

[0033] In order to illustrate...

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Abstract

The invention provides an intermittent sampling forwarding interference suppression method based on a cognitive radar waveform. The technical scheme comprises the following steps: the first step of intermittent sampling forwarding interference parameter estimation, a cognitive radar emits a linear frequency modulation pulse signal firstly, an echo signal is analyzed, and an estimation value of a sampling pulse width and an estimation value of a forwarding period are obtained; and the second step of intermittent sampling forwarding interference suppression, the cognitive radar emits a specific intra-pulse frequency modulation signal, interference interval signal zero setting is performed on a received radar echo signal, splicing is performed then, and matching filtering is performed on the signal to obtain a pulse pressure result of a jammer Real target detection performance can be effectively improved, and intermittent sampling forwarding interferences in direct forwarding, repeated forwarding and other forwarding modes are achieved.

Description

technical field [0001] The invention belongs to the technical field of anti-radar active interference, and in particular relates to an intermittent sampling and forwarding interference suppression method based on cognitive radar waveforms. Background technique [0002] Intermittent sampling and forwarding jamming is a highly efficient active jamming pattern that has developed rapidly in recent years. By intermittently sampling and forwarding a single pulse signal of the chirp radar, this jamming pattern can make the radar end form a series of false targets distributed before and after the jammer body, and has the effect of deception and suppression at the same time. Therefore, from the perspective of radar anti-jamming, it is necessary to rapidly develop identification and suppression methods for intermittent sampling and forwarding jamming. [0003] In his doctoral dissertation "Research on Active Jamming Countermeasure Technology for Wideband LFM Radar" (National Universi...

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Application Information

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IPC IPC(8): G01S7/36G01S7/02
CPCG01S7/023G01S7/36
Inventor 刘振谌睿隋金坪魏玺章
Owner NAT UNIV OF DEFENSE TECH
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