Synchrosqueezing-based recovery of instantaneous frequency from nonuniform samples


Journal Article

We propose a new approach for studying the notion of the instantaneous frequency of a signal. We build on ideas from the Synchrosqueezing theory of Daubechies, Lu, andWu [Appl. Comput. Harmonic Anal., 30 (2010), pp. 243-261] and consider a variant of Synchrosqueezing, based on the short-time Fourier transform, to precisely define the instantaneous frequencies of a multicomponent AM-FM signal. We describe an algorithm to recover these instantaneous frequencies from the uniform or nonuniform samples of the signal and show that our method is robust to noise. We also consider an alternative approach based on the conventional, Hilbert transform-based notion of instantaneous frequency to compare to our new method. We use these methods on several test cases and apply our results to a signal analysis problem in electrocardiography. © 2011 Society for Industrial and Applied Mathematics.

Full Text

Duke Authors

Cited Authors

  • Thakur, G; Wu, HT

Published Date

  • November 21, 2011

Published In

Volume / Issue

  • 43 / 5

Start / End Page

  • 2078 - 2095

International Standard Serial Number (ISSN)

  • 0036-1410

Digital Object Identifier (DOI)

  • 10.1137/100798818

Citation Source

  • Scopus