基于多项式Chirplet变换的线性调频引信干扰波形设计方法  

Design Method of Interference Waveform for the Frequency-modulated Continuous Wave Radio Fuze Based on Polynomial Chirplet Transform

作　　者：闫晓鹏[1] 张锦玉 郝新红[1] 李剑锋 代健 YAN Xiaopeng;ZHANG jinyu;HAO Xinhong;LI Jianfeng;DAI Jian(Science and Technology on Electromechanical Dynamic Control Laboratory,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京理工大学机电动态控制重点实验室,北京100081

出　　处：《兵工学报》2024年第2期504-515,共12页Acta Armamentarii

基　　金：国家自然科学基金项目(61973037)。

摘　　要：针对现代战场环境下线性调频引信干扰技术的迫切需求,提出多项式Chirplet变换的方法实现低信噪比下对调频连续波无线电引信的信号参数估计,并针对调频连续波引信重构了干扰信号。基于线性小波变换原理,选取适当的核函数,将无线电引信信号经过旋转与平移操作后进行短时傅里叶变换,再利用遗传算法求得变换核的最优参数,实现对调频连续波信号的参数估计,并重构干扰信号。仿真对比结果表明,该方法可以在较低信噪比下实现对调频连续波无线电引信信号载波频率、调制周期、最大频偏等参数进行精准估计,相较于周期调制类干扰,重构干扰信号能够以更低功率对调频引信产生较好的干扰效果。Aiming at the urgent needs of linear frequency-modulated fuze jamming technology in the modern battlefield environment,a method of polynomial Chirplet transform is proposed to estimate the signal parameters of frequency-modulated continuous wave(FMCW)radio fuze under low signal-to-noise ratio,and reconstruct the jamming signal for FMCW fuze.Based on the principle of linear wavelet transform,an appropriate kernel function is selected,the radio fuze signal is subjected to short-time Fourier transform after rotation and translation operations,and then the optimal parameters of transform kernel are obtained by genetic algorithm.The parameter estimation of FMCW signal is realized,and the jamming signal is reconstructed.The simulated results show that the proposed method can be used to accurately estimate the carrier frequency,modulation period and maximum frequency offset of FMCW radio fuze signal under a low signal-to-noise ratio,and the reconstructed jamming signal can produce a better jamming effect on FM fuze compared to the periodically modulated interference.

关 键 词：多项式Chirplet变换 参数估计 调频连续波 参数化时频分析 干扰重构 

分 类 号：TJ434.1[兵器科学与技术—火炮、自动武器与弹药工程]