The Optimal Sampling Period of a Fingerprint Positioning Algorithm for Vehicle Speed Estimation

Table 8

Cost and RER for Case 1.

Sampling period (sec)	Cost (count/hr)	Relative cost ratio (%)	Relative error ratio (RER)
1	132	144%	4.88%
20	85	57%	1.74%
41.589	54	0	0
60	35	−35%	−6.62%
80	22	−59%	−8.01%
100	20	−63%	−12.89%
120	9	−83%	−15.33%

Bold values refer that the optimal sampling period was 41.589 s. And we explain in Section 4.2.5.