Table 3. A rigorous optimisation over all parameters of the systolic peak detection algorithm: frequency band, , , and the offset .

Iterations	Frequency Band	W 1	W 2	β	SE	+P	Overall Accuracy (%)
1	0.5–8 Hz	111	667	2	100.00	99.72	99.86
2	0.5–8 Hz	111	667	3	100.00	99.72	99.86
3	0.5–8 Hz	111	694	2	100.00	99.72	99.86
4	0.5–8 Hz	111	694	3	100.00	99.72	99.86
5	0.5–9 Hz	111	667	2	100.00	99.72	99.86
6	0.5–9 Hz	111	694	2	100.00	99.72	99.86
7	0.5–9 Hz	111	694	3	100.00	99.72	99.86
8	0.5–7 Hz	111	694	2	99.90	99.72	99.81
9	0.5–7 Hz	69	694	9	99.90	99.72	99.81
10	0.5–7 Hz	69	694	10	99.90	99.72	99.81
11	0.5–7 Hz	83	639	10	99.90	99.72	99.81
12	0.5–7 Hz	83	667	8	99.90	99.72	99.81
13	0.5–7 Hz	83	667	9	99.90	99.72	99.81
14	0.5–7 Hz	83	667	10	99.90	99.72	99.81
15	0.5–7 Hz	83	694	6	99.90	99.72	99.81
16	0.5–7 Hz	83	694	7	99.90	99.72	99.81
17	0.5–7 Hz	83	694	8	99.90	99.72	99.81
18	0.5–7 Hz	83	694	9	99.90	99.72	99.81
19	0.5–7 Hz	83	694	10	99.90	99.72	99.81
20	0.5–7 Hz	97	611	8	99.90	99.72	99.81
.	.	.	.	.	.	.	.
.	.	.	.	.	.	.	.
.	.	.	.	.	.	.	.
.	.	.	.	.	.	.	.
5606	1–15 Hz	69	556	0	98.27	95.78	97.02
5607	1–12 Hz	56	556	0	98.27	95.67	96.97
5608	1–13 Hz	56	556	0	98.27	95.57	96.92
5609	1–14 Hz	56	556	0	98.27	95.57	96.92
5610	1–15 Hz	56	556	0	98.27	95.57	96.92

All possible combinations of parameters (5,610 iterations) have been investigated and sorted in descending order according to their overall accuracy. The data used in this training phase was PPG measured at rest. The overall accuracy is the average value of SE and +P.