连续波线性调频引信中多普勒频率抑制研究  

A Study on Restraining Doppler Frequency of LFM Fuze

作　　者：周新刚[1] 赵惠昌[1] 邓建平[1] 王鑫[1] 

机构地区：[1]南京理工大学电光学院,江苏南京210094

出　　处：《探测与控制学报》2007年第5期44-47,共4页Journal of Detection & Control

基　　金：国防预研项目资助(51305060101)

摘　　要：简述了连续波线性调频引信的基本工作原理,然后以锯齿波为基础,分析了该体制引信信号的频率-时间曲线,推导了多普勒频率与测距误差的关系式,指出多普勒频率对连续波线性调频引信测距精度的严重影响。在此基础上,提出一种消除多普勒频率的方法,对改进后引信各关键环节的输出信号进行分析,从理论上解决了多普勒效应对线性调频引信测距的不良影响。Firstly, the fundamental of continuous wave linear frequency-modulation （CW-LFM）fuze is discussed. Then frequency-time curve is analyzed and the relation expression of Doppler frequency and range error is deduced;On this basis,a method that eliminates Doppler frequency is put forward, which can not only improve the ranging precision greatly, but also measure target radial velocity accurately. The output signals of the important parts in the fuze improved is analyzed also. Theoretically the improved method solves the problem that Doppler frequency affects the ranging precision of CW-LFM fuze.

关 键 词：线性调频 径向速度 多普勒频率 锯齿波 

分 类 号：TN958.94[电子电信—信号与信息处理]