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A recursive digital differentiator for ECG preprocessing

Authors
Journal
Medical Engineering & Physics
1350-4533
Publisher
Elsevier
Publication Date
Volume
16
Issue
4
Identifiers
DOI: 10.1016/1350-4533(94)90050-7
Keywords
  • Digital Signal Processing
  • Ecg Recursive Digital Differentiator

Abstract

Abstract 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.

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