对线性调频雷达的距离波门拖近干扰研究  

Jamming Research on Range Gate Pull-in for LFM Radar

作　　者：陶华敏[1] 陈登伟[2] 刘建成[1] 杨建华[1] 

机构地区：[1]国防科技大学电子科学与工程学院,湖南长沙410073 [2]上海交通大学电子工程系,上海200030

出　　处：《电子对抗》2006年第4期1-6,共6页Electronic Warfare

基　　金：全国优秀博士学位论文专项资金资助项目（No.08100101）

摘　　要：针对距离波门拖引干扰对参差脉冲雷达、随机定位脉冲雷达无效的问题，文章从匹配滤波器群延迟的角度解释了对线性调频（LFM）雷达能够通过频率调制实现距离波门拖近。文章首先研究了调频前移导致的幅度损失问题，给出了幅度损失与频率的关系。然后研究了对LFM雷达的距离波门拖近干扰的频率调制和幅度调制问题，并给出了距离波门拖近干扰机的结构。最后进行了仿真验证，结果证实了理论分析的正确性。Aimed at the problem that the range gate pull-in jamming is no effect to the staggered pulse radar and random location pulse radar, in this paper, the opinion that the range gate pull-in for LFM radar can be realized by frequency modulation is expressed in the view of group delay of matched filter. First, the problem of amplitude loss because of frequency mismatch with matched filter is studied, and the relationship between amplitude loss and frequency is given. Second, the problems of frequency modulation and amplitude modulation of range gate pull-in jamming to LFM radar are studied, and the structure of the range gate pull-in jammer is given. At last, simulation is carried out and the result demonstrates the correct of the theory analysis.

关 键 词：距离波门拖近 LFM雷达 DBFM 调频 调幅 

分 类 号：TN958.6[电子电信—信号与信息处理] TN974[电子电信—信息与通信工程]