Time/frequency analysis of respiratory mechanics via amplitude modulation of multiple carriers

Author

Bates, Jason H T

Author_Institution

Dept. of Biomed. Eng., McGill Univ., Montreal, Que., Canada

Volume

2

fYear

1995

fDate

20-23 Sep 1995

Firstpage

1071

Abstract

Time/frequency analysis of nonstationary linear dynamic systems is usually performed using the short-time fast Fourier transform or the wavelet transform. An alternative approach is presented here in which the system to be identified is excited with a superposition of distinct sinusoids, each of which is amplitude-modulated in the output by the time-varying system dynamics. Each component is then filtered out and demodulated separately by application of a recursive time-domain model. The method is applied to the analysis of changing respiratory system impedance simulated by a two-compartment model of the lungs

Keywords

amplitude modulation; medical signal processing; physiological models; pneumodynamics; time-frequency analysis; distinct sinusoids superposition; multiple carriers; nonstationary linear dynamic systems; recursive time-domain model; respiratory mechanics; respiratory system impedance; time/frequency analysis; two-compartment lung model; Analytical models; Fast Fourier transforms; Frequency; Impedance; Performance analysis; Respiratory system; Time domain analysis; Time varying systems; Wavelet analysis; Wavelet transforms;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 1995., IEEE 17th Annual Conference

Conference_Location

Montreal, Que.

Print_ISBN

0-7803-2475-7

Type

conf

DOI

10.1109/IEMBS.1995.579492

Filename

579492