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Multitaper Wigner and Choi-Williams distributions with pre-determined doppler-lag bandwidth and sidelobe suppression

In English

Författare

Summary, in English

In this paper, a penalty function is designed and used in the computation of multitapers which correspond to the Wigner and Choi-Williams distributions. The resulting multitaper spectrogram will approximately fulfill the concentration of the distribution but will additionally suppress the cross-terms outside a predetermined Doppler-lag bandwidth. The specific region as well as the amount of cross-term suppression is determined by parameters of the penalty function. The proposed method uses a limited number of multitapers which results in computationally efficient calculations. The time-frequency concentration and resolution of the proposed method and the original distribution are compared and the performance for signals disturbed by white noise is also evaluated. Estimation of event related potentials disturbed by EEG exemplify the use of the method. (C) 2010 Elsevier B.V. All rights reserved.

Avdelning/ar

Publiceringsår

2011

Språk

Engelska

Sidor

1457-1465

Publikation/Tidskrift/Serie

Signal Processing

Volym

91

Issue

6

Dokumenttyp

Artikel i tidskrift

Förlag

Elsevier

Ämne

  • Probability Theory and Statistics

Nyckelord

  • Cross-term
  • Time-frequency distributions
  • Multiple window
  • Spectrogram
  • Penalty function
  • Event related potentials
  • EEG

Status

Published

Forskningsgrupp

  • Statistical Signal Processing
  • Stochastics in Medicine
  • Statistical Signal Processing Group

ISBN/ISSN/Övrigt

  • ISSN: 0165-1684