Title :
Adaptive reduction of motion artifact from photoplethysmographic recordings using a variable step-size LMS filter
Author :
Chan, K.W. ; Zhang, Y.T.
Author_Institution :
Dept. of Electron. Eng., Chinese Univ. of Hong Kong, Shatin, China
Abstract :
Photoplethysmography (PPG) is widely used for the continuous monitoring of peripheral circulation. However, the quality of the PPG signal is degraded drastically by motion artifact caused during dynamic recordings. In this paper, a LMS filter with automatic step-size control is proposed to mitigate the effects of motion artifact in PPG recordings for long-term patient monitoring. Experimental results show that the proposed variable step-size LMS filter can provide better performance than the LMS filter with fixed step-size.
Keywords :
adaptive filters; adaptive signal processing; bio-optics; cardiovascular system; least mean squares methods; optical information processing; patient monitoring; plethysmography; LED; automatic step-size control; cardiovascular parameters; continuous monitoring; dynamic recordings; fixed step-size; long-term patient monitoring; motion artifact adaptive reduction; peripheral circulation; photoplethysmographic recordings; phototransistor; variable step-size LMS filter; Adaptive filters; Convergence; Fingers; Least squares approximation; Light emitting diodes; Motion detection; Optoelectronic and photonic sensors; Phototransistors; Probes; Transversal filters;
Conference_Titel :
Sensors, 2002. Proceedings of IEEE
Print_ISBN :
0-7803-7454-1
DOI :
10.1109/ICSENS.2002.1037314
