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Target detection method in interference environment

A technology of target detection and environment, applied in the field of target detection in the interference environment, can solve the problems affecting the normal detection and tracking of targets, false alarms, etc., and achieve the effect of improving the probability of correct detection and avoiding the loss of target point traces.

Active Publication Date: 2016-06-08
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, deceptive jamming based on digital radio frequency memory forwarding can easily enter the radar receiving system, causing a large number of false alarms and affecting the normal detection and tracking of targets

Method used

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  • Target detection method in interference environment
  • Target detection method in interference environment
  • Target detection method in interference environment

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Embodiment Construction

[0030] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0031] Such as figure 1 As shown, the present invention discloses a target detection method in an interference environment, comprising the following steps:

[0032] Step 1), sending N pulse data into the radar target detector;

[0033] Step 2), respectively detect the time series information of the target state on the input N pulse data, and form N pulse value functions, specifically:

[0034] Step 2.1), preprocessing, for each input pulse data, its amplitude is compared with the preset amplitude threshold threshold, if its amplitude is greater than or equal to the preset amplitude threshold threshold, give it a preset first confidence value x 1 , and then the first confidence value x 1 and is assigned the first confidence value x 1The pulse data of the target state is sent to the subsequent target state time series detection link;

[0035] S...

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Abstract

The invention discloses a target detection method in an interference environment. In the interference environment, the target information is modeled as a time sequence (x1, x2, ..., xk) of a target state during the radar information processing operation, wherein the value of a value function K at the state xk represent the difference between the target and the interference in the fields of amplitude, Doppler, motion characteristics and other fine characteristics. Through searching all possible time sequences of the target state, one state sequence that enables the target value function K to be maximal is found out. After that, the value functions K of multiple pulses are accumulated by utilizing a DPA, and then the detection result of the target is finally given. Therefore, the target detection performance in the interference environment is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of radar target detection, and in particular relates to a target detection method in an interference environment. Background technique [0002] With the rapid development of new electronic jamming technology and the continuous emergence of advanced electronic jamming measures and equipment, the working electromagnetic environment faced by modern radars is becoming increasingly complex. In particular, active spoofing jamming based on digital radio frequency memory (DRFM) technology, which has developed rapidly in recent years, poses the most common threat to military radars due to its many styles, flexible use, and strong resistance. [0003] The jammer based on the digital radio frequency memory stores the received radar signal, and then delays and phase modulates the signal as needed before forwarding it to the radar, generating a signal similar to the target echo to act on the radar detection and tracking ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/36
CPCG01S7/36
Inventor 麻清华蒋德富
Owner HOHAI UNIV