|START||NEW VOL 20||SEARCH||STATISTICS||PAS - GDANSK DIVISION|
pp. 29-36, vol. 17, 2014
Gdansk University of Technology, Faculty of Electronics, Telecommunications and Informatics, Gdansk, Poland
Key words: instantaneous frequency; group delay; spectrogram; reassignment
Abstract: Novel dynamic representations of a complex signal in the time-frequency domain in- cluding: a channelized instantaneous complex frequency (CICF), a complex local group delay (CLGD) and a channelized instantaneous chirp-rate (CICR) are introduced. The proposed approach is based on the use of the gradient of the short-time Fourier transform complex phase. An interpretation of the newly-introduced distributions especially of the CICR is demonstrated by a chirp-rate estimation of mono- and multicomponent FM signals in the time-frequency domain. The paper corresponds to a part of the dissertation.
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