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Multitaper Estimation of the Coherence Spectrum in low SNR

Brynolfsson, Johan LU and Sandsten, Maria LU (2014) 22nd European Signal Processing Conference - EUSIPCO 2014 In European Signal Processing Conference
Abstract
A pseudo coherence estimate using multitapers is presented. The estimate has better localization for sinusoids and is shown to have lower variance for disturbances compared to the usual coherence estimator. This makes it superior in terms of finding coherent frequencies between two sinusoidal signals; even when observed in low SNR. Different sets of multitapers are investigated and the weights of the final coherence estimate are adjusted for a low-biased estimate of a single sinusoid. The proposed method is more computationally efficient than data dependent methods, and does still give comparable results.
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
coherence, cross-spectrum, multitaper, sinusoids
in
European Signal Processing Conference
pages
5 pages
publisher
EURASIP
conference name
22nd European Signal Processing Conference - EUSIPCO 2014
external identifiers
  • scopus:84911910128
ISSN
2219-5491
language
English
LU publication?
yes
id
94da1aae-178c-477c-9a42-7cdc6c07b431 (old id 4588812)
alternative location
http://www.eurasip.org/Proceedings/Eusipco/Eusipco2014/HTML/papers/1569925367.pdf
date added to LUP
2014-09-17 11:37:45
date last changed
2017-03-13 13:14:44
@inproceedings{94da1aae-178c-477c-9a42-7cdc6c07b431,
  abstract     = {A pseudo coherence estimate using multitapers is presented. The estimate has better localization for sinusoids and is shown to have lower variance for disturbances compared to the usual coherence estimator. This makes it superior in terms of finding coherent frequencies between two sinusoidal signals; even when observed in low SNR. Different sets of multitapers are investigated and the weights of the final coherence estimate are adjusted for a low-biased estimate of a single sinusoid. The proposed method is more computationally efficient than data dependent methods, and does still give comparable results.},
  author       = {Brynolfsson, Johan and Sandsten, Maria},
  booktitle    = {European Signal Processing Conference},
  issn         = {2219-5491},
  keyword      = {coherence,cross-spectrum,multitaper,sinusoids},
  language     = {eng},
  pages        = {5},
  publisher    = {EURASIP},
  title        = {Multitaper Estimation of the Coherence Spectrum in low SNR},
  year         = {2014},
}