Definition of instantaneous frequency and frequency measurability
- 1 December 1975
- journal article
- Published by American Association of Physics Teachers (AAPT) in American Journal of Physics
- Vol. 43 (12) , 1087-1088
- https://doi.org/10.1119/1.9931
Abstract
It is pointed out that the definitions of instantaneous and Fourier frequencies of a signal are noncausal and their measurement requires physically unrealizable systems. Some additional definitions of frequency are given that are causal.Keywords
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