Title :
Study on the influence of a noisy environment on the ECG correlation dimension determination; possible use for noise estimation
Author :
Casaleggio, A. ; Morando, M. ; Ridella, S.
Author_Institution :
Istituto Circuiti Elettronici, Consiglio Nazionale Delle Ricerche, Genova, Italy
Abstract :
It is shown how the determination of the correlation dimension ( D2), an algorithm which allows the estimation of a nonlinear system degrees of freedom, is affected by the presence of noise. The poor accuracy in computing D2 is related to the noise fraction of the signal measurement. A very simple empirical way to adjust the D2 value is presented. Some preliminary results on a rough way for the noise fraction estimation are given. This study has been done mainly on a Henon attractor, and D 2 adjustments have been tried on electrocardiogram (ECG) signals, yielding D2 values ranging between 1 and 2, in healthy subjects
Keywords :
electrocardiography; noise; waveform analysis; ECG correlation dimension determination; Henon attractor; algorithm; degrees of freedom; healthy subjects; noise estimation; noisy environment; nonlinear system; signal measurement; Biomedical measurements; Circuit noise; Electrocardiography; Humans; Libraries; Linear systems; Noise measurement; Signal analysis; Time series analysis; Working environment noise;
Conference_Titel :
Computers in Cardiology 1990, Proceedings.
Conference_Location :
Chicago, IL
Print_ISBN :
0-8186-2225-3
DOI :
10.1109/CIC.1990.144254
