Figure 4
From: Assessment of pulse rate variability by the method of pulse frequency demodulation
Effects of adaptation and optimization algorithms. Simulated pulse wave signal was generated by a sinusoidal source interval function (panel A) that fluctuated between 600 and 1400 ms (corresponding pulse rate, from 43 to 100 bpm). Panel B: the demodulated pulse interval with fixed Fr (60 bpm) and Fc (40 bpm). Panel C: the demodulated pulse interval with data segmentation (length, 30 s with 10-sec overlapping at both end) and Fr adaptation (Fc was set at Fr/3). Panel D: the demodulated pulse interval with data segmentation, Fr adaptation and Fr optimization with iteration (Fc was set at Fr/3).