摘要
提出了一种低截获概率跳频信号的截获方法,该方法基于信号小波尺度谱的重排时间尺度分布,在未知任何先验条件情况下,能够检测并提取非合作跳频信号的跳频频率、跳频周期和跳变时刻特征参数信息。文中比较了跳频信号的小波尺度谱与重排小波尺度谱分析效果,提出了基于重排小波尺度谱的跳频信号参数盲估计算法,通过计算机仿真得到了较为准确的估计结果,并对算法的性能进行了分析,验证了该方法的有效性。
A novel method for intercepting LPI frequency hopping（FH） signal is presented,which based on reassignment time-scale distribution.This method can exactly extract and estimate the parameters of non-cooperative FH signals,such as hop duration,hop timing and hopping frequencies without knowing any a prior knowledge.Analysis results of FH signals using scalogram and reassigned scalogram are compared,and the parameter estimating algorithm is given based on reassigned scalogram.Exact extracting results are obtained by computer simulating and good performances of this algorithm are shown through analyzing the results.
出处
《电路与系统学报》
北大核心
2013年第2期314-320,共7页
Journal of Circuits and Systems
关键词
重排
时间尺度分布
跳频
参数盲估计
reassignment
time-scale distribution
frequency hopping
parameter estimation
