The study presents a general method for designing digital low-pass differentiators optimized for processing ECG signals like QRS complexes and P-T waves.
Optimizes ECG differentiator design when spectra known; leaves open prospective validation before clinical use.
Digital low-pass filtering and differentiation (LPD) are useful in real-time processing of many biomedical signals. A general method is presented for determining the coefficients of a differentiator that maximizes the signal-to-noise ratio or minimizes the error between actual and ideal LPD filters, when signal and noise spectra are known. Several examples of digital filters suitable for QRS complex and P-T wave processing in ECG are presented.
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Laguna et al. (1990) studied this question.
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