A radar anti-jamming detection method based on automatic gain control

Abstract

The invention discloses a radar anti-jamming detection method based on automatic gain control. The external interference situation of the radar is obtained in real time through the radar AGC voltage; the normal AGC voltage data is obtained by using the AGC voltage data of the radar echoes of the previous n consecutive frames; and the interference is obtained. Judgment threshold; when the AGC voltage data of the radar echo in the current frame is not less than the interference judgment threshold, the current radar is in the interfered state, and the cumulative number of interferences is increased; when the cumulative number of interferences reaches the limit of interference times, the current operating frequency point of the radar is removed, and at the same time Record the time of removing the interference frequency point, set the cumulative number of radar echoes being interfered to 0, and start recording the cumulative number of radar echoes being interfered; after removing the interference frequency point, calculate the radar working time since the interference frequency point is removed. When the time of the interference frequency reaches the release time, release the current frequency. The invention has low complexity, small overall calculation amount, low requirements on hardware equipment, easy realization, wide application range, more time saving and low complexity.

Description

technical field [0001] The invention relates to the aerospace field, in particular to a radar anti-jamming detection method based on automatic gain control, which can be applied to the radar anti-jamming field. Background technique [0002] With the wide application of electronic countermeasures technology, the background of electronic interference in space is becoming increasingly complex and diverse. The complex electronic interference environment greatly increases the difficulty and risk of normal radar operation, and even makes the predetermined operation plan completely invalid. In order to complete the on-orbit mission while ensuring the radar airspace detection capability, effective radar anti-jamming detection technology is urgently needed. [0003] In recent years, with the development of environmental perception technology, relevant scholars have proposed many anti-interference detection methods. Although the traditional radar anti-jamming method has achieved good...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a radar anti-interference detection method based on automatic gain control, which uses the automatic gain control voltage to solve the problem that the radar receiver is subject to space electronic interference; The received power changes and changes; if there is no external interference, the radar received power is basically stable, and the receiver AGC voltage remains relatively stable; if there is external interference and the interference frequency is the same as the radar operating frequency, the radar received power will be affected by the interference signal The receiver AGC voltage changes accordingly; therefore, the present invention can judge the external interference situation and determine the current interference frequency points that need to be removed through the variation of the radar automatic gain control voltage

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