摘要
小波包变换是小波变换的推广,对频率的划分是等间距的,并且划分更为精细,精度更高。为此,将其引入引信信号处理,利用小波包频带的阶梯滤波特性构造二维的时频分布,比较不同脱靶参数的典型弹目交会测试曲线的小波包二维时频分布图,得到弹目交会位置信息的关系及二维时频特征。对地作用的近炸引信的弹目交会信号处理中,利用小波包分析构造二维的时频分布,可以提高目标探测的准确性,利用脱靶方位信息实现弹药的有效打击。
Wavelet packet transform is the extension of wavelet transform,which divides spectrum into equal parts with higher precision,and therefore it is applied to fuze signal processing.In order to get the relation among different miss parameters and 2-D time-frequency characteristics,the 2-D time-frequency distributions of the typical signal curves of missile-target encounter with different miss parameters are compared by analyzing the stepped filtering feature of wavelet packet frequency band.When processing the missile-target encounter signals of proximity fuzes against ground,the 2-D time-frequency distribution is established by the wavelet packet to improve the accuracy of target detection.The effective attack is realized by taking advantage of miss azimuth information.
出处
《探测与控制学报》
CSCD
北大核心
2009年第1期5-9,共5页
Journal of Detection & Control
基金
国防预研项目资助(编号不公开)
关键词
近炸引信
小波包
弹目交会
频谱
proximity fuze
wavelet packet
missile-target encounter
spectrum
