Journal article
The demodulated band transform
Journal of neuroscience methods, Vol.261, pp.135-154
03/01/2016
DOI: 10.1016/j.jneumeth.2015.12.004
PMCID: PMC5084918
PMID: 26711370
Abstract
Background: Windowed Fourier decompositions (WFD) are widely used in measuring stationary and non-stationary spectral phenomena and in describing pairwise relationships among multiple signals. Although a variety of WFDs see frequent application in electrophysiological research, including the short time Fourier transform, continuous wavelets, bandpass filtering and multitaper-based approaches, each carries certain drawbacks related to computational efficiency and spectral leakage. This work surveys the advantages of a WFD not previously applied in electrophysiological settings.
New methods: A computationally efficient form of complex demodulation, the demodulated band transform (DBT), is described.
Results: DBT is shown to provide an efficient approach to spectral estimation with minimal susceptibility to spectral leakage. In addition, it lends itself well to adaptive filtering of non-stationary narrowband noise.
Comparison with existing methods: A detailed comparison with alternative WFDs is offered, with an emphasis on the relationship between DBT and Thomson's multitaper. DBT is shown to perform favorably in combining computational efficiency with minimal introduction of spectral leakage.
Conclusion: DBT is ideally suited to efficient estimation of both stationary and non-stationary spectral and cross-spectral statistics with minimal susceptibility to spectral leakage. These qualities are broadly desirable in many settings. (C) 2015 Elsevier B.V. All rights reserved.
Details
- Title: Subtitle
- The demodulated band transform
- Creators
- Christopher K. Kovach - University of IowaPhillip E. Gander - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Journal of neuroscience methods, Vol.261, pp.135-154
- DOI
- 10.1016/j.jneumeth.2015.12.004
- PMID
- 26711370
- PMCID
- PMC5084918
- NLM abbreviation
- J Neurosci Methods
- ISSN
- 0165-0270
- eISSN
- 1872-678X
- Publisher
- Elsevier
- Number of pages
- 20
- Grant note
- American Foundation for Suicide Prevention R01AA018736 / NATIONAL INSTITUTE ON ALCOHOL ABUSE AND ALCOHOLISM; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Institute on Alcohol Abuse & Alcoholism (NIAAA) R01DC004290 / NATIONAL INSTITUTE ON DEAFNESS AND OTHER COMMUNICATION DISORDERS; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Institute on Deafness & Other Communication Disorders (NIDCD) NIH R01 DC004290-14; NIH 5R01 AA018736-03 / NIH; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA
- Language
- English
- Date published
- 03/01/2016
- Academic Unit
- Radiology; Neurosurgery; Otolaryngology
- Record Identifier
- 9984318813102771
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