Title :
A wireless pulse oximetry system with active noise cancellation of motion artifacts
Author :
Chun-Yen Wang ; Yi-Hsiang Yang ; Kea-Tiong Tang ; Shi-Xian Wang ; Jen-Ming Wu
Author_Institution :
Dept. of Electr. Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan
Abstract :
Mobile health care has been greatly emphasized nowadays. This paper presents a system composed of pulse oximetry and low complexity baseband transceiver. The technique of adaptive filter is employed to reduce motion artifact effect. In addition, normalized least mean squares (NLMS) algorithm using an isobestic wavelength(800nm) as noise reference is used for noise cancellation. The proposed transceiver features low-power data transmitting and receiving to meet the power specification of mobile devices. A novel adaptive serial search acquisition, which updates detection threshold adaptively, is utilized to optimize power efficiency. This system monitors blood oxygen saturation and wirelessly transmits the detected signal. Experiment results demonstrate the noise cancellation and power efficiency of the system.
Keywords :
adaptive filters; biomedical equipment; blood; health care; least mean squares methods; medical signal detection; medical signal processing; optical transceivers; oximetry; oxygen; patient monitoring; signal denoising; active noise cancellation; adaptive filter; adaptive serial search acquisition; blood oxygen saturation; detection threshold; isobestic wavelength; low complexity baseband transceiver; mobile devices; mobile health care; motion artifact effect; normalized least mean squares algorithm; power efficiency optimisation; power specification; signal detection; transceiver feature low-power data receiving; transceiver feature low-power data transmission; wavelength 800 nm; wireless pulse oximetry system; Adaptive filters; Blood; Error analysis; Medical services; Noise cancellation; Signal to noise ratio;
Conference_Titel :
Biomedical Circuits and Systems Conference (BioCAS), 2012 IEEE
Conference_Location :
Hsinchu
Print_ISBN :
978-1-4673-2291-1
Electronic_ISBN :
978-1-4673-2292-8
DOI :
10.1109/BioCAS.2012.6418398
