Title :
1/f Fluctuations of breathing rate in fetal sheep and IPFM model
Author :
Noguchi, Y. ; Hataoka, H. ; Sugimoto, S. ; Kobayashi, Hideo ; Kobayashi, H. ; Cheng, P. ; Dwyer, G. ; Szeto, H.H.
Author_Institution :
Dept. of Appl. Phys., Natl. Def. Acad., Yokosuka 239, Japan
fDate :
Oct. 29 1992-Nov. 1 1992
Abstract :
Fetal breathing rates (FBR) in sheep have been investigated using spectral analysis techniques. The power spectral densities of the FBR were found to be inversely proportional to Fourier frequency (1/f spectrum) below 0.06 Hz. The levels of the 1/f spectrum are same with changing the morphine dose, when normalized by the mean square of the data. In order to simulate 1/f fluctuation of the FBR, the integral pulse frequency modulation (IPFM) model is used, and parameters were fluctuated various random noise. As a result, 1/f fluctuation similar to the experimental data is obtained with the 1/f fluctuation of the parameters.
Keywords :
Distance measurement; Electrocardiography; Fluctuations; Frequency control; Frequency modulation; Noise;
Conference_Titel :
Engineering in Medicine and Biology Society, 1992 14th Annual International Conference of the IEEE
Conference_Location :
Paris, France
Print_ISBN :
0-7803-0785-2
Electronic_ISBN :
0-7803-0816-6
DOI :
10.1109/IEMBS.1992.5761568
