摘要
在导弹雷达导引头中已广泛采用匹配滤波技术提高信噪比,但在飞机利用箔条干扰进行末端防卫的过程中,传统分析认为无源干扰信号比(JSR)能够维持不变,这已不符合当前实际。通过分析目标和箔条回波信号频率特性,以及研究经过匹配滤波器后的目标和箔条信号功率,对无源JSR进行了修正。最后建立了一种典型飞机自卫模型,进行了对比仿真,结果表明修正后的JSR可描述箔条干扰的实际效果,飞机必须通过连续且密集地投放箔条弹,才能维持箔条的干扰。
Matching filter technique has been adopted by missiles′ homing radar to improve the SNR（Signal-Noise-Ratio）.The traditional concept took it for granted that the JSR（Jamming-to-Signal Ratio） would be kept unchanging in couse of fighter′s end self-protection by launching chaff ammos,which was not abreast of the times obviously.So the JSR is modified in this paper by analysing target and chaff echos′ frequency characters and researching on the both echos′ power characters after matching filter.Finally,a contrastive simulation is made according to a typical missile-attacking-fighter model and the result shows that the modified JSR is apt to discribe the real chaff jamming efficiency,and the fighter must launch chaff ammos thickly and fastly to keep the chaff jamming.
出处
《电讯技术》
北大核心
2012年第10期1591-1595,共5页
Telecommunication Engineering
基金
基金项目:陕西省自然科学基金项目(2012JQ8019)
陕西省电子信息系统综合重点实验室基金资助项目(201113Y01)~~
关键词
导弹雷达导引头
末端防卫
无源干扰
干扰信号比
匹配滤波
missile homing radar
end self-protection
passive jamming
jamming-to-signal ratio
matching filter
