When Interpolation-Induced Reflection Artifact Meets Time-Frequency Analysis.


Journal Article

While extracting the temporal dynamical features based on the time-frequency analyses, like the reassignment and synchrosqueezing transform, attracts more and more interest in biomedical data analysis, we should be careful about artifacts generated by interpolation schemes, in particular when the sampling rate is not significantly higher than the frequency of the oscillatory component we are interested in.We formulate the problem called the reflection effect and provide a theoretical justification of the statement. We also show examples in the anesthetic depth analysis with clear but undesirable artifacts.The artifact associated with the reflection effect exists not only theoretically but practically as well. Its influence is pronounced when we apply the time-frequency analyses to extract the time-varying dynamics hidden inside the signal.We have to carefully deal with the artifact associated with the reflection effect by choosing a proper interpolation scheme.

Full Text

Duke Authors

Cited Authors

  • Lin, Y-T; Flandrin, P; Wu, H-T

Published Date

  • October 2016

Published In

Volume / Issue

  • 63 / 10

Start / End Page

  • 2133 - 2141

PubMed ID

  • 26841380

Pubmed Central ID

  • 26841380

Electronic International Standard Serial Number (EISSN)

  • 1558-2531

International Standard Serial Number (ISSN)

  • 0018-9294

Digital Object Identifier (DOI)

  • 10.1109/tbme.2015.2510580


  • eng