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On frequency-domain and time-domain phase unwrapping

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1 Author(s)
Zimmermann, K.P. ; University of Missouri, Columbia, MO

Time-domain phase unwrapping of analytic or complex functions of time is an unavoidable operation when processing such signals within an FM-modeling framework or when attempting to establish the instantaneous frequency of such signals. With the help of an alternate derivation of his equations, Tribolet's frequency-domain phase unwrapping algorithm is easily rewritten for time-domain application. The time derivative of the argument of the signal, a quantity needed in these modified equations, is developed and furthermore recognized to be proportional to the instantaneous frequency of the signal.

Published in:

Proceedings of the IEEE  (Volume:75 ,  Issue: 4 )