摘要
HHT是一种新的非平稳信号处理技术,该方法由EMD与Hilbert谱分析两部分组成。本质上它是对非平稳信号进行平稳化处理,将信号中的不同尺度波动或趋势逐级分解出来,最终用瞬时频率和能量来表征原信号的频率含量。应用HHT时频分析方法对实际雷达脉内信号进行分析,结果表明HHT方法是一种非常有效的时频分析方法,能较好地描述和提取信号时频特征。
Hilbert-Huang Transform（HHT） is a new non-stationary signal processing technology. This method contains two parts：empirical mode decomposition（EMD） and the Hilbert spectral analysis. The essence of the method is to carry out stationary process to the non-stationary signal, and decompose the different scale undulation or trend in signals,ultimately the instantaneous frequency and energy represent the frequency components of the original signal. This paper analyzes the actual radar intra-pulse signals by HHT time-frequency analysis method,the result shows that the HHT method is a time-frequency analysis method with great efficiency,it can describe and extract the time-frequency characteristics of the signal.
出处
《舰船电子对抗》
2008年第2期76-79,共4页
Shipboard Electronic Countermeasure
关键词
瞬时频率
本征模函数
Hilbert谱分析
脉内分析
instantaneous frequency
intrinsic mode frequency
Hilbert spectral analysis
intra- pulse analysis
