LFM-BC雷达信号的间歇采样转发干扰的研究  

Intermissive Sampling and Repeating Jamming Based on LFM-BC Radar Signal

作　　者：刘业民[1] 刘忠[1] 王涛[1] 吴双俊[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

出　　处：《现代防御技术》2010年第4期127-131,150,共6页Modern Defence Technology

基　　金：国家自然科学基金资助项目(60875019)

摘　　要：线性调频-二相编码(LFM-BC)信号是在二相编码信号脉内进行线性调频处理得到的组合信号。利用LFM-BC信号附加多普勒频移通过匹配滤波器的响应特点,研究了基于数字射频存储的间歇采样转发干扰方法对采用该信号的脉冲压缩雷达的干扰效果。分析了调制参数(占空比、间歇采样周期、正频调制)对干扰效果的影响以及干扰功率与干信比。根据调制参数的不同可以产生压制性干扰和欺骗性干扰,且相对于常规射频噪声干扰而言只需要较小的干扰功率。理论和仿真实验均证明了这种干扰方法的正确性和实际应用的可行性。LFM - BC signal is a kind of combination signal attained from processing line frequency modulation inside BC signal. Based on the characteristics of LMF - BC signal＇ affixation Doppler frequency shift after matched filtering, the method of intermissive sampling and repeating jamming based on radio frequency memory is adopted to jam the LFM - BC signal PC radar. The modulating parameters （duty ratio and intermissive sampling period and positive frequency modulating） infection of jamming and jamming power and JSR are analyzed. According to different modulating parameters, false targets deceptive jamming or cover jamming can be produced. This jamming technique can counter the LFM - BC radar and only lower jamming power is required compared to conventional noise jamming. The theory analysis and computer simulation justify the validity and efficiency of the jamming technique.

关 键 词：线性调频-二相编码信号 脉冲压缩 间歇采样转发干扰 

分 类 号：TN972[电子电信—信号与信息处理] TP391.9[电子电信—信息与通信工程]