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.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2009年第8期1861-1863,共3页
Systems Engineering and Electronics
关键词
线性调频信号
脉冲压缩
移频干扰
linear frequency modulated signal
pulse compression
shift-frequency jamming
