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Estimating and interpreting the instantaneous frequency of a signal. I. Fundamentals

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1 Author(s)
Boashash, B. ; Sch. of Electr. & Electron. Eng., Queensland Univ. of Technol., Brisbane, Qld., Australia

The concept of instantaneous frequency (IF), its definitions, and the correspondence between the various mathematical models formulated for representation of IF are discussed. The extent to which the IF corresponds to the intuitive expectation of reality is also considered. A historical review of the successive attempts to define the IF is presented. The relationships between the IF and the group-delay, analytic signal, and bandwidth-time (BT) product are explored, as well as the relationship with time-frequency distributions. The notions of monocomponent and multicomponent signals and instantaneous bandwidth are discussed. It is shown that these notions are well described in the context of the theory presented

Published in:

Proceedings of the IEEE  (Volume:80 ,  Issue: 4 )

Date of Publication:

Apr 1992

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