| AF | Atrial fibrillation |
| APW | Arterial pulse waveform |
| BD | Baseline drift |
| SDOF | Single-degree-of-freedom |
| TVSPs | Time-varying system parameters |
| MA | Motion artifacts |
| SDOF-TF | Single-degree-of-freedom time–frequency |
| HVD | Hilbert vibration transform |
| PFs | Other physiological factors |
| FFT | Fast Fourier transform |
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