A recursive digital differentiator for ECG preprocessing.
A simple recursive digital low-pass differentiator is derived from a classical lossless resonator model. It is shown that the error behaviour of the proposed differentiator is more uniformly distributed with respect to an ideal differentiator than that of a typical non-recursive digital low-pass differentiator widely used in electrocardiogram processing. The recursive digital low-pass differentiator is implemented in the form of a correlation receiver model suitable for QRS detection. Three-cycle single-lead ECG test data are used to demonstrate low-pass filtering, baseline drift suppression, and R-wave detection.
School of Electronics and Communication Engineering, College of Engineering, Madras, India.
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D015982:Bias; D003198:Computer Simulation; D003661:Decision Support Techniques; D004562:Electrocardiography; D005069:Evaluation Studies as Topic; D009716:Numerical Analysis, Computer-Assisted; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted