基于重排时间尺度分布的跳频信号参数盲估计
Blind parameters estimation of frequency-hopping signals based on reassignment time-scale distribution
张曦 1王红卫 1王星1
作者信息
- 1. 空军工程大学航空航天工程学院,陕西西安710038
- 折叠
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.
Abstract
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.
关键词
重排/时间尺度分布/跳频/参数盲估计Key words
reassignment/time-scale distribution/frequency hopping/parameter estimation引用本文复制引用
出版年
2013
NETL
NSTL
维普
万方数据