摘要
为了有效分析跳频信号并估计其参数,根据跳频信号的特点,提出一种基于信号分解的时频分析方法.该方法先将多分量跳频信号通过带通滤波变成多个单分量信号,再将每个分量的Wigner-Ville分布(WVD)线性叠加得到新的时频分布.理论分析和仿真结果表明,提出的时频分析方法能有效抑制跳频信号的交叉项干扰,与现有方法相比,具有更高的时频分辨率,更适合跳频信号的时频分析和参数估计.
To make an analysis and estimate the parameters of frequency-hopping signal,a time-frequency analysis method based on signal decomposition is proposed according to the characteristics of frequency-hopping signals.And a multi-component frequency-hopping signal is firstly decomposed into multiple single-component signals with a group of band-pass filters.The Wigner-Ville distribution（WVD） of each component is sum up to form a new time-frequency distribution.Simulation shows that the new time-frequency analysis method can effectively suppress cross-term interference of frequency-hopping signals.Compared with the existings,this new method preserves a higher time-frequency resolution.
出处
《北京邮电大学学报》
EI
CAS
CSCD
北大核心
2010年第3期10-14,共5页
Journal of Beijing University of Posts and Telecommunications
基金
国家自然科学基金项目(60672132
60872149)
关键词
跳频信号
信号分解
时频分析
交叉项
时频分辨率
frequency-hopping signals
signal decomposition
time-frequency analysis
cross-term
time-frequency resolution
