[A new method using the technique of cubic spline interpolation to remove baseline wander].
The present methods available for correction of baseline wander with cubic spline interpolation technique all determine the fiducial points from P-R intervals. However, the determination of the fiducial points can be adversely affected by a noisy signal or an uneven P-R interval. In this paper, we introduce a new method of determining fiducial points by using the feature of high frequency of QRS wave. First, we correct the baseline approximately by using a FIR filter, then find the position of R peak and its amplitude change after filtering. The experiments demonstrate that the previous position and amplitude change can be looked as the position and amplitude of a fiducial point. Finally, we estimate a continuous baseline by joining fiducial points with spline. Our experiment results show that this is a better filtering method in comparison with the one introduced in reference paper [3].
Xia
Hengchao
H
Electronics Control Institute, Shanghai Jiaotong University, Shanghai 200030.
Zhan
Yongqi
Y
D000465:Algorithms; D016477:Artifacts; D003198:Computer Simulation; D004562:Electrocardiography / Q000379:methods*; D006801:Humans; D008955:Models, Cardiovascular; D012815:Signal Processing, Computer-Assisted