THE DISCRETE-TIME PHASE DERIVATIVE AS A DEFINITION OF DISCRETE INSTANTANEOUS FREQUENCY AND ITS RELATION TO DISCRETE TIME-FREQUENCY DISTRIBUTIONS

被引：4
|
作者：
JEONG, J
CUNNINGHAM, GS
WILLIAMS, WJ
机构：
[1] LOS ALAMOS NATL LAB,HYDRODYNAM GRP,LOS ALAMOS,NM 87545
[2] UNIV MICHIGAN,DEPT ELECT ENGN & COMP SCI,ANN ARBOR,MI 48109
来源：
IEEE TRANSACTIONS ON SIGNAL PROCESSING | 1995年 / 43卷 / 01期
关键词：
D O I：
10.1109/78.365325
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：
We compare two definitions of the instantaneous frequency of a discrete signal: the two-point symmetric phase difference and the discrete-time phase derivative. The phase derivative definition avoids the pitfalls associated with the two-point definition and is equal to the first moment w.r.t. frequency of a properly defined, alias-free time-frequency distribution of the signal, which is consistent with the continuous-time case.
引用
收藏
页码：341 / 344
页数：4
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