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독립요소분석을 이용한 태아심전도 추출을 위한 시변 칼만 평활기의 개발-예비연구

Other Titles
 Development of Time Varying Kalman Smoother for Extracting Fetal ECG using Independent Component Analysis : Preliminary Study 
Authors
 이충근 ; 김봉수 ; 남기창 ; 송광섭 ; 최영득 ; 권자영 
Citation
 전자공학회논문지, Vol.49(10) : 202~208, 2012 
Journal Title
 전자공학회논문지 
ISSN
 1016-135X 
Issue Date
2012
Abstract
Fetal heart rate monitoring is important information to assess fetal well-being. Non-invasive fetal ECG (electrocardiography) can be derived from maternal abdominal signal. And various promising signal processing methods have been introduced to extract fetal ECG from mother’s composite abdominal signal. However, non-invasive fetal ECG monitoring still has not been widely used in clinical practice due to insufficient reliable measurement and difficulty of signal processing. In application of signal processing method to extract fetal ECG, it might be lower signal to noise ratio due to time varying white Gaussian noise. In this paper, time varying Kalman smoother is proposed to remove white noise in fetal ECG and its feasibility is confirmed. Wiener process was set as Kalman system model and covariance matrix was modified according to white Gaussian noise level. Modified error covariance matrix changed Kalman gain and degree of smoothness. Optimal covariance matrix according to various amplitude in Gaussian white noise was extracted by 5 channel fetal ECG model, and feasibility of proposed method could be confirmed.
URI
http://ir.ymlib.yonsei.ac.kr/handle/22282913/92473
Appears in Collections:
1. 연구논문 > 1. College of Medicine > Dept. of Obstetrics & Gynecology
1. 연구논문 > 1. College of Medicine > Yonsei Biomedical Research Center
1. 연구논문 > 1. College of Medicine > Dept. of Medical Engineering
1. 연구논문 > 1. College of Medicine > Dept. of Urology
1. 연구논문 > 1. College of Medicine > Dept. of Life Science
Yonsei Authors
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