摘要
针对线性调频(LFM)引信距离欺骗干扰问题,研究了一种结合随机调斜率和盲分离(BSS)的干扰抑制方法。该方法采用区别对待机制,首先采用随机调斜率,使敌方不易获取引信信号关键参数,从而可以通过简单的匹配滤波方法进行抗干扰。在随机调斜率失效的情况下再采用盲分离算法分离回波和干扰,然后根据频谱的连续性原理获取完整分离信号,最后根据数字射频存储(DRFM)相位量化的特性来区分回波和干扰。实验仿真表明,在干扰信号调斜率达到4%误差以上时随机调斜抗干扰具有很好的效果,且算法中很少(小于10%)会采第二种盲分离算法,因而运算量大为降低,可为引信抗欺骗干扰提供重要的实际参考。
To solve the problem of linear FM（ LFM） fuze distance deception jamming, a new jamming sup-pression method is studied which combines random slope and blind source separation（ BSS） . This method adopts discriminated mechanism, which can make the enemies difficult acquire the fuze’s signal parame-ter. So, the simple method can be used to suppress the jamming. When the random slope is invalid,BSS can be used to separate the echo and jamming,and the spectrum continuity principle is used to acquire the intact signals, and then the digital radio frequency memory（ DRFM） phase quantification’s characteristic is used to distinguish the echo and jamming. The experiments results indicate that when the jamming signal’s slope is greater than four percent, the random slope jamming suppression has great effect, and there is less than ten percent to use the method of BSS. So, the calculated amount can be reduced greatly.
出处
《电讯技术》
北大核心
2014年第1期52-57,共6页
Telecommunication Engineering
关键词
LFM引信
距离欺骗干扰
干扰抑制
随机调斜率
盲分离
LFM fuze
distance deception jamming
jamming suppression
random slope
blind source separation
