Research On Interference And Anti-interference Technology Of Intelligent Ammunition Passive Detectors

This paper mainly does some research on the passive and active interference technology of passive millimeter wave detector in intelligent ammunition(terminal sensitive missile)and the anti-interference technology of such kind of interference.First of all,according to the difference of radiation between armored target and background,a mathematical model of intelligent ammunition passive millimeter wave detector output signals is set up in this paper.And the principle of interference and anti--interference for passive detector is analyzed based on the system structure.Then,stealth material interference and profiling bait interference are analyzed as passive interference.This paper simulates the interference effect of different stealth materials and profiling bait,and uses dual band detection technology to resist stealth material interference.Next,active cancellation jamming and waveform deception jamming in the passive interference are analyzed and spatial waveform deception technique and time domain waveform deception technique are proposed as implementation scheme of two kinds of wave decoy jamming.Jamming effect of different time domain interference signals is focus analyzed and the frequency hopping technology,dual-channel and bipolar technology and signal feature extraction and recognition technology to achieve anti-jamming are studied.And then,Logistic regression and Support Vector Machine(SVM)as signal feature extraction and recognition technology for wave decoy jamming are deeply analyzed.And from the angle of recognition speed and detection probability,the improved classification recognition algorithm:Logistic-SVM based on probability threshold is put forward.Simulation tests of Logistic,SVM as well as improved Logistic-SVM have been done.At last,a test system for waveform decoy interference is designed and the field experiments on simulated armor target and waveform decoy jamming system have also been done.The feasibility of waveform decoy jamming is verified by analyzing experimental data.At the same time,the anti-jamming effect of improved Logistic-SVM algorithm is tested by reprocessing the experimental data.