一种新的空空雷达主动制导导弹抗速度波门拖引干扰方法

速度波门拖引干扰是常用的导引头干扰技术,它严重影响空空雷达主动制导导弹的速度跟踪通道,导致其不能稳定跟踪目标,及时转入末制导状态,影响导弹的作战效能。为有效识别干扰,针对该类干扰信号特点,提出了一种基于EMD分解的抗速度波门拖引干扰的方法。通过对目标多普勒回波信号进行分解,滤除回波信号中的高频干扰部分,并对低频分量进行信号重构,得到消除干扰后的回波信号。仿真结果表明,该方法能较好地抑制拖引干扰。

A New Method of Countering Velocity Deception Jamming for Active-Radar-Guided AAM

Velocity gate pulling off deception is a common jamming technique,which may affect the velocity tracking system of the active-radar-guided AAM greatly.As a result,the missile can't capture the target stably and change to the terminal guidance state in time,which may affect its operational efficiency.In order to recognize the jamming effectively,a method for countering velocity deception jamming based on Empirical Mode Decomposition (EMD) was proposed according to the characteristics of jamming signal.With this method,the Doppler echo signal was separated and the high frequency part of signal by jamming could be removed.At the same time,the de-noised echo signal was restored by reconstructing the low frequency part.The simulation results show that the jamming is depressed effectively.