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Signal, Image and Video Processing

, Volume 13, Issue 3, pp 517–524 | Cite as

Instantaneous frequency estimation of intersecting and close multi-component signals with varying amplitudes

  • Nabeel Ali KhanEmail author
  • Mokhtar Mohammadi
  • Sadiq Ali
Original Paper
  • 186 Downloads

Abstract

Instantaneous frequency (IF) estimation of multi-component signals with closely spaced and intersecting signal components of varying amplitudes is a challenging task. This paper presents a novel iterative time–frequency (TF) filtering approach to address this problem. The proposed algorithm first adopts a high-resolution time–frequency distribution to resolve close components in the TF domain. Then, IF of the strongest signal component is estimated by a new peak detection and tracking algorithm that takes into account both the amplitude and the direction of peaks in the TF domain. The estimated IF is used to remove the strongest component from the mixture, and this process is repeated till the IFs of all signal components are estimated. Experimental results show the superiority of the proposed method as compared to other state-of-the-art methods.

Keywords

Instantaneous frequency estimation Adaptive time–frequency analysis Intersecting components Highly adaptive directional time–frequency distribution 

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Copyright information

© Springer-Verlag London Ltd., part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Electrical EngineeringFoundation UniversityIslamabadPakistan
  2. 2.Department of Information TechnologyUniversity of Human DevelopmentSulaimanyahIraq
  3. 3.Department of Electrical EngineeringUniversity of Engineering and TechnologyPeshawarPakistan

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