基于全脉冲分段转发的LFM雷达干扰方法  

Repeat jamming against LFM radars based on pulse separation

作　　者：潘小义[1] 王伟[1] 冯德军[1] 傅其祥[1] 王国玉[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：《国防科技大学学报》2013年第3期119-125,共7页Journal of National University of Defense Technology

基　　金：国家自然科学基金资助项目(61072119)

摘　　要：线性调频(LFM)脉冲雷达输出信号时延敏感于输入信号频率,基于此,文中提出了一种基于雷达全脉冲信号分段转发的干扰方法,通过对雷达完整脉冲信号的合理分段并排序转发,在LFM脉冲压缩雷达匹配滤波处理后形成多假目标干扰。利用群延迟原理揭示了脉冲分段转发干扰机理;根据干扰信号频谱和匹配滤波原理,推导了多假目标输出形式;给出了假目标幅度不低于真目标时脉冲分段数计算公式及假目标数目最多时对应的转发次序要求;仿真实验验证了理论分析的正确性。The time delay of output signal is sensitive to the frequency of input signal in LFM pulse compression radars.In light of this,a novel repeat jamming is presented based on pulse separation in which the separated pulses are retransmitted in a rearranged order.After the matched filtering,a set of false targets were induced.The jamming technique was explained in detail with group delay theory.Formulas of separation number on condition that false targets hold amplitude dominance and retransmitted order with the maximum number of false targets were presented.Finally,the theoretical analysis was verified by the simulation results.

关 键 词：LFM 群延迟 脉冲分段 转发干扰 

分 类 号：TN974[电子电信—信号与信息处理]