Title :
Comparative evaluation of adaptive filters in motion artifact cancellation for pulse oximetry
Author :
Kunchon, Sitthi ; Desudchit, Tayard ; Chinrungrueng, Chedsada
Author_Institution :
Dept. of Electr. Eng., Chulalongkorn Univ., Bangkok
Abstract :
Among non-invasive approaches, pulse oximeters are most commonly used medical equipment for measuring blood oxygen saturation level. However, their accuracy is severely subjected to motion artifact and environmental noise. In this paper, we aim to evaluate empirically the effectiveness of adaptive filters in motion artifact cancellation for finger pulse oximeters. Our experiments compared the Least Mean Square (LMS) adaptive filter and the Exponentially Weighted Least Square (EWLS) adaptive filter with the Minimum Correlation Discrete Saturation Transform (MCDST). The experimental results indicate that both adaptive filters can perform better than the MCDST, and the EWLS adaptive filter better than the LMS adaptive filter in motion noise reduction.
Keywords :
adaptive filters; biomechanics; blood; medical signal processing; oximetry; blood oxygen saturation level; exponentially-weighted least square adaptive filter; finger pulse oximeters; least-mean-square adaptive filter; medical equipment; minimum correlation discrete saturation transform; motion artifact cancellation; motion noise reduction; pulse oximetry; Adaptive filters; Biomedical equipment; Blood; Discrete transforms; Fingers; Least squares approximation; Least squares methods; Noise reduction; Pulse measurements; Working environment noise; Pulse oximetry; accelerometers; adaptive noise cancellation; minimum correlation discrete saturation transform;
Conference_Titel :
Signal Processing & Its Applications, 2009. CSPA 2009. 5th International Colloquium on
Conference_Location :
Kuala Lumpur
Print_ISBN :
978-1-4244-4151-8
Electronic_ISBN :
978-1-4244-4152-5
DOI :
10.1109/CSPA.2009.5069240
