Table 2.

The optimized values for path loss exponent and distance offset (in meter) per AP and path. The values obtained from the calibration path are used for the position estimation.

	Path Loss Exponent ${\mathit{\gamma }}_{\mathit{i}}$								Distance Offset ${\mathit{k}}_{\mathit{i}}$
	${\mathit{\gamma }}_{\mathbf{1}}$	${\mathit{\gamma }}_{\mathbf{2}}$	${\mathit{\gamma }}_{\mathbf{3}}$	${\mathit{\gamma }}_{\mathbf{4}}$	${\mathit{\gamma }}_{\mathbf{5}}$	${\mathit{\gamma }}_{\mathbf{6}}$	${\mathit{\gamma }}_{\mathbf{7}}$	${\mathit{\gamma }}_{\mathbf{8}}$	${\mathit{k}}_{\mathbf{1}}$	${\mathit{k}}_{\mathbf{2}}$	${\mathit{k}}_{\mathbf{3}}$	${\mathit{k}}_{\mathbf{4}}$	${\mathit{k}}_{\mathbf{5}}$	${\mathit{k}}_{\mathbf{6}}$	${\mathit{k}}_{\mathbf{7}}$	${\mathit{k}}_{\mathbf{8}}$
Calibration Path	2.656	3.313	2.672	3.547	3.203	3.500	3.266	3.594	−0.813	−5.000	−0.156	−2.813	−6.344	−9.750	−4.844	−10.00
Path 1	2.625	3.250	2.656	2.922	3.219	3.281	3.109	3.688	−0.781	−1.813	0.219	−7.813	−8.781	−7.344	−6.563	−10.00
Path 2	2.708	3.313	2.813	3.396	3.208	3.396	3.146	3.750	−0.375	−1.667	0.583	−3.917	−8.542	−7.667	−5.542	−6.958
Path 3	2.531	3.391	2.766	3.250	3.047	3.563	3.313	3.688	0.031	−4.031	0.656	−6.313	−6.250	−9.031	−6.563	−9.844