Tag: iir

    ECG IIR Notch Filtering Using Transient Suppression

    Recently, I was going through my undergraduate lecture notes. I stumbled upon an exercise which I found interesting. The task consisted in implementing the algorithm proposed by Pei and Tseng, which uses vector projection to minimize the problem of transient values when applying an IIR notch filter to an ECG signal.

    Top: original ECG signal with AC interference noise. Middle: filtered ECG signal using a typical IIR notch filter. Bottom: filtered ECG signal using an IIR notch filter with the proposed transient suppression technique.

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