基于延迟不变的LFM雷达移频干扰方法  

Method of shift-frequency jamming to LFM radar based on delay invariance

作　　者：王玉军[1,2] 赵国庆[1] 胡曦明[2] 

机构地区：[1]西安电子科技大学电子对抗研究所,陕西西安710071 [2]空军工程大学电讯工程学院,陕西西安710077

出　　处：《系统工程与电子技术》2009年第8期1861-1863,共3页Systems Engineering and Electronics

摘　　要：提出了一种新的移频干扰方法,利用线性调频(linear frequency modulated,LFM)信号频率差与时间无关的特性,将LFM信号与其自身延迟信号相乘,获得当前脉冲线性时频关系与频率差,并用此频率差对LFM信号进行移频,所得到的干扰信号对频率捷变和频率分集具有自适应性。给出了一种实现此算法的干扰机结构,并推导了干扰信号经匹配滤波后增益损失计算方法。最后进行了仿真验证,仿真结果与理论分析一致。A new method is proposed according to the features that the frequency difference of linear frequency modulated （LFM） signal is independent to time. The LFM signal is multiplied by its self-delayed one to get the linear relationship between them and then the LFM signal frequency is shifted. This method is adaptive to chirp-rate-agility or frequency-diversity. One of the jammer structures which can realize the method is given and the calculation formulas describing the gain of the jamming signal after match filter is deduced, The simula tion result is consistent with the one obtained by theoretical analysis.

关 键 词：线性调频信号 脉冲压缩 移频干扰 

分 类 号：TN972.31[电子电信—信号与信息处理]