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http://dx.doi.org/10.9708/jksci.2014.19.2.101

Design of Filter to Reject Motion Artifacts of PPG Signal Using Multiwave Optical Source  

Park, Heejung (Dept. of Medical Engineering, Andong Science College)
Nam, Jaehyun (Dept. of Nursing, Andong Science College)
Lee, Juwon (Dept. of Medical Engineering, Andong Science College)
Abstract
This study is proposed the novel PPG sensor device and the signal processing method to replace the acceleration sensor that is used to reject motion artifacts contained in photoplethysmography(PPG). The proposed method is to reject motion artifacts by an adaptive filter based on the estimated motion artifact by using a blue LED light. To evaluate the performance of the proposed method experimentally, We did design a novel sensor consisted of blue/red LEDs and photo-sensor and implemented, and then rejected the motion artifacts by using an adaptive filter and the implemented sensor. In the results of the experiments, it is shown that the proposed sensor device and signal processing can reconstruct the PPG signal despite the occurrence of motion artifacts, and also that the SNR was 4.5 times of moving average filter. According to the experimental results, the proposed method can be applied to design a low-cost device.
Keywords
Mobile-Healthcare; Telemedicine; Adaptive filter; Motion artifacts; Photoplethysmograph(PPG); Photosensor;
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Times Cited By KSCI : 2  (Citation Analysis)
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