When is instantaneous frequency the average frequency at each time?

被引：37

作者：

Nho, W ^{[1
]}

Loughlin, PJ ^{[1
]}

机构：

[1] Univ Pittsburgh, Dept Elect Engn, Pittsburgh, PA 15261 USA

来源：

IEEE SIGNAL PROCESSING LETTERS | 1999年 / 6卷 / 04期

基金：

美国国家科学基金会;

关键词：

analytic signal; conditional mean frequency; instantaneous frequency; time-frequency analysis;

D O I：

10.1109/97.752059

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The interpretation of instantaneous frequency has been a subject of interest for many Sears, One interpretation is that it is the average frequency at each time in the signal. We prove that instantaneous frequency equals the average frequency at each time only when there is symmetry in the instantaneous spectrum, as recent empirical evidence has suggested. Also, when there is such symmetry, the average frequency at each time equals the median frequency at each time.

引用

页码：78 / 80

页数：3

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