Elimination of interference component in Wigner-Ville distribution for the signal with 1/f spectral characteristic

A new technique for interference-term suppression in the Wigner-Ville distribution (WVD) is proposed for signals with a 1/f spectrum shape. The spectral characteristic of the signal is altered by f/sup /spl alpha// filtering before time-frequency analysis and compensated after analysis. With the uti...

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Bibliographic Details
Published in:IEEE transactions on biomedical engineering 1997-09, Vol.44 (9), p.903-907
Main Authors: CHAN, H.-L, LIN, J.-L, HUANG, H.-H, WU, C.-P
Format: Article
Language:English
Subjects:
Biological and medical sciences
Cardiovascular system
Filtering
Finite impulse response filter
Frequency response
Heart Rate - physiology
Heart rate variability
Humans
Interference elimination
Interference suppression
Investigative techniques, diagnostic techniques (general aspects)
Medical sciences
Models, Cardiovascular
Shape
Signal analysis
Signal Processing, Computer-Assisted
Spectral analysis
Supine Position
Time frequency analysis
Ultrasonic investigative techniques
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Summary:A new technique for interference-term suppression in the Wigner-Ville distribution (WVD) is proposed for signals with a 1/f spectrum shape. The spectral characteristic of the signal is altered by f/sup /spl alpha// filtering before time-frequency analysis and compensated after analysis. With the utilization of the proposed technique in a smoothed pseudo Wigner-Ville distribution, an excellent suppression of the interference component can be achieved. The authors apply this technique to the heart rate variability signal.
ISSN:0018-9294
1558-2531
DOI:10.1109/10.623060