摘要
针对分数阶傅里叶变换(FRFT)在抑制无线电引信多分量LFM干扰时存在分辨力低、干扰抑制效果差的问题,提出基于信息熵的调频引信分数域干扰抑制方法。该方法将分数城频谱幅度特征转换为四阶原点矩信息熵,通过信息熵分级对比实现了最优分数变换阶数估计。仿真实验表明,该方法可以提高多分量LFM干扰信号频率、调频率的分辨力,在低信噪比条件下有更好的干扰抑制性能。
Aiming at the problems of low resolution and poor interference suppression effect of fractional Fourier transform(FRFT)in suppressing multi-component LFM interference of radio fuze,a fractional domain interference suppression method of FM fuze based on information entropy was proposed.This method calculated the information entropy of the fourth-order origin moment,which realized the estimation of the order of the optimal fractional transformation through the hierarchical comparison of the information entropy.Simulation results showed that this method could improve the resolution of multi-component LFM interference signal frequency and modulation frequency,and had better interference suppression performance under the condition of low signal-to-noise ratio.
作者
张天鹏
谢嘉
杨金钢
姜海旭
孙发鱼
ZHANG Tianpeng;XIE Jia;YANG Jingang;JIANG Haixu;SUN Fayu(Science and Technology on Electromechanical Dynamic Control Laboratory,Xi'an 710065,China;Xi'an Institute of Electromechanical Information Technology,Xi'an 710065,China)
出处
《探测与控制学报》
CSCD
北大核心
2022年第5期53-57,共5页
Journal of Detection & Control
基金
机电动态控制重点实验室基金课题资助项目(6142601200609)。
关键词
无线电引信
抗干扰
分数阶傅里叶变换
信息熵
radio fuze
anti-interference
fractional Fourier transform
information entropy
