Fig. 9
From: Fast time-varying linear filters for suppression of baseline drift in electrocardiographic signals
Input signal No. MO1_023_12 (lead V3) (upper panel). Vertical detail of HP output for f c = 0.67 Hz (−0.5 dB) (light grey line) and time-varying HP output (−0.5 dB at f c = f ECG ) with knots between QRS complexes (black line) (middle panel). Constant (0.67 Hz) and time-varied HP cut-off frequency (lower panel)