ISSN:
1741-0444
Keywords:
Autonomic nervous system
;
Blood pressure
;
Cross-Wigner distribution
;
Respiration
;
R-R interval
;
Spectral analysis
;
Time/frequency mapping
;
Wigner distribution
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
Notes:
Abstract The discrete Wigner distribution (DWD) was implemented for the time/frequency mapping of variations of R-R interval, blood pressure and respiratory signals. The smoothed cross-DWD was defined and the modified algorithm for the smoothed auto- and cross-DWD was proposed. Spurious cross-terms were suppressed using a smoothing data window and a Gauss frequency window. The DWD is easy to implement using the FFT algorithm. Examples show that the DWD follows well the instantaneous changes of spectral content of cardiovascular and respiratory signals which characterise the dynamics of autonomic nervous system responses.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02446667
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