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

Table 10

Cost and RER for Case 2.

Sampling period (sec)	Cost (count/hr)	Relative cost ratio (%)	Relative error ratio (RER)
1	458	144%	2.99%
20	329	54%	0.75%
41.589	214	0	0
60	147	−31%	−3.37%
80	83	−61%	−4.48%
100	53	−75%	−5.22%
120	39	−82%	−4.48%

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