Signal enhancement by time-frequency peak filtering

Boashash, B. and Mesbah, M. (2004) Signal enhancement by time-frequency peak filtering. IEEE Transactions on Signal Processing, 52 4: 929-937. doi:10.1109/TSP.2004.823510


Author Boashash, B.
Mesbah, M.
Title Signal enhancement by time-frequency peak filtering
Journal name IEEE Transactions on Signal Processing   Check publisher's open access policy
ISSN 1053-587X
Publication date 2004-04-01
Year available 2004
Sub-type Article (original research)
DOI 10.1109/TSP.2004.823510
Open Access Status
Volume 52
Issue 4
Start page 929
End page 937
Total pages 9
Place of publication Piscataway, U.S.A.
Publisher IEEE Signal Processing Society
Language eng
Subject 090609 Signal Processing
280204 Signal Processing
Abstract Time-frequency peak filtering (TFPF) allows the reconstruction of signals from observations corrupted by additive noise by encoding the noisy signal as the instantaneous frequency (IF) of a frequency modulated (FM) analytic signal. IF estimation is then performed on the analytic signal using the peak of a time-frequency distribution (TFD) to recover the filtered signal. This method is biased when the peak of the Wigner-Ville distribution (WVD) is used to estimate the encoded signal's instantaneous frequency. We characterize a class of signals for which the method implemented using the pseudo WVD is approximately unbiased. This class contains deterministic bandlimited nonstationary multicomponent signals in additive white Gaussian noise (WGN). We then derive the pseudo WVD window length that gives a reduced bias when TFPF is used for signals from this class. Testing of the method on both synthetic and real life newborn electroencephalogram (EEG) signals shows clean recovery of the signals in noise level down to a signal-to-noise ratio (SNR) of -9 dB.
Keyword Time-frequency peak filtering
TFPF
Time frequency distribution
TFD
Wigner-Ville distribution (WVD)
Q-Index Code C1
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
UQ Centre for Clinical Research Publications
School of Medicine Publications
 
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Created: Thu, 19 Mar 2009, 02:13:46 EST by Laura McTaggart on behalf of UQ Centre for Clinical Research