摘要
该文介绍一种新的非平稳信号分析方法一局域波分析。该方法源于瞬时频率的概念,它能把动态信号的局部特征正确地在时频域内予以描述。局域波分解的基不是固定的,而是随动态信号波形的变化而变化,具有自调节自适应的特征。与传统的时频分析方法相比,局域波分析有很多优点,它是分析非平稳信号的一般方法。该文讨论了局域波分析的应用,指出了该方法需进一步研究的有关问题。
A new method for analyzing nonstationary signal designated as local wave analysis is introduced. It stems from the concept of instantaneous frequency, and it can describe accurately the local properties of dynamic data in the time-frequency plane. The basis of local wave decomposition is not fixed but changeable with the changing wave shape of the dynamic data. The decomposition is adaptive, and therefore highly efficient. Compared with the available time-frequency analysis methods, this method has many advantages. It is commonly used for analyzing nonstationary signal. The application of this method is discussed, and the related problems in this field that need further study are pointed out, too.
出处
《电子与信息学报》
EI
CSCD
北大核心
2003年第10期1327-1333,共7页
Journal of Electronics & Information Technology
关键词
非平稳信号
瞬时频率
局域波分析
局域波分解
基本模式分量
时频分析
Nonstationary signal, Instantaneous frequency, Local wave analysis, Local wave decomposition, Intrinsic mode function, Time-frequency analysis
