Title :
A combined method to reduce motion artifact and power line interference for wearable healthcare systems
Author :
Hong, Sunjoo ; Song, Kiseok ; Yan, Long ; Yoo, Hoi-Jun
Author_Institution :
Dept. of EE, Korea Adv. Inst. of Sci. & Technol. (KAIST), Daejeon, South Korea
Abstract :
A combined method to reduce motion artifact (MA) and power line interference (PLI) for wearable healthcare system is introduced. The proposed method has a block for the reduction of MA using measured electrode-skin impedance as a reference signal and a block for the cancellation of PLI using mixed-signal feedback to relax the dynamic range requirements of components in the forward path. The measured electrode-skin impedance is used as a reference signal of an adaptive filter for reducing MA. The 60Hz notch frequency which has the same amplitude as PLI´s is made digitally and uses feedback to the input stage to reduce PLI. This method was simulated using MATLAB/Simulink for high-level verification of the method´s validity.
Keywords :
adaptive filters; bioelectric potentials; biomedical electrodes; electrocardiography; feedback; health care; interference (signal); mathematics computing; medical signal processing; patient monitoring; power cables; skin; MATLAB; Simulink; adaptive filter; electrode-skin impedance; frequency 60 Hz; mixed-signal feedback; motion artifact reduction; power line interference; wearable healthcare systems; Adaptive filters; Electrocardiography; Electrodes; Impedance; Impedance measurement; Monitoring; Simulation; Electrode-skin impedance; motion artifact; power line interference; wearable healthcare system;
Conference_Titel :
Circuits and Systems (APCCAS), 2010 IEEE Asia Pacific Conference on
Conference_Location :
Kuala Lumpur
Print_ISBN :
978-1-4244-7454-7
DOI :
10.1109/APCCAS.2010.5775062
