앞으로 도래할 유비쿼터스 환경에서의 u-health 분야에서는 일상생활에서의 생체신호 수집이 중요한 역할을 하게 된다. 그러나 일상생활에서 PPG나 ECG 신호 같은 생체 신호의 측정은 움직임에 의한 동잡음에 매우 민감하다. 본 논문에서는 제한된 움직임 아래에서 정확한 생체 신호를 수집하기 위해 움직임이 적은 이마에 PPG 센서를 부착하여 PPG 신호를 측정하여 보고 일반적으로 PPG 신호를 측정하는 손가락에서 측정하였을 때와 비교하여 보았다. 또한 PPG 센서 옆에 가속도 센서를 부착하여 PPG 신호와 가속도 신호와의 상관관계를 분석하여, PPG 신호의 동잡음을 최소화 할 수 있는 지 분석해 보았다.
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