对多普勒引信的离散移频干扰

Shift-frequency Jamming in Different Time Period against Doppler Fuze

为了将足够的干扰能量注入多普勒引信的多普勒滤波器,并达到同时干扰多发引信的目的,提出针对多普勒引信及带增幅速率检测电路的多普勒引信的离散移频干扰技术。首先简要介绍了多普勒信号和引信多普勒滤波器的特点以及普通噪声和欺骗信号很难干扰多普勒引信的原因;在此基础上提出基于瞬时测频的离散移频干扰技术,给出离散移频干扰信号的构造及参数选择的方法,并通过计算机仿真分析其干扰效果;然后针对带增幅速率检测电路的多普勒引信提出离散移频干扰两点改进,即采用增幅速率模拟和随机离散移频方法;最后基于瞬时测频接收机、DDS和PLL搭建了一种离散移频干扰机的系统结构方案。

In order to infuse enough jamming power into Doppler filters of several Doppler fuzes and realize jamming multiple fuzes simultaneousing, shift - frequency jamming technique is proposed in different time period against Doppler fuze with amplitude increasing detect circuit. Characteristics of Doppler signal and Doppler filter that prevent Doppler fuze from ordinary noise or deceptive jamming is introduced firstly. For this cause, shift- frequency jamming technique in different time period based on instantaneous frequency measurement is put forward. Jamming signal makeup and parameters selecting method is given out subsequently, the jamming effect is also illustrated by computer simulation. Then two improvements for Doppler fuze with amplitude increasing detect circuit are intro- duced that are amplitude increase simulation and random shift- frequency. Finally, a block scheme based on instantaneous frequency measurement（IFM）, DDS and PLL for shift-frequency jammer in different time period is designed.