Wireless Network Indoor Positioning Method Using Nonmetric Multidimensional Scaling and RSSI in the Internet of Things Environment

Table 1

Position data of some nodes.

Nodes	Actual coordinates	Estimated coordinates	Error (m)
N1	(0.9, 9.0)	(1.7, 8.9)	0.81
N2	(1.1, 7.4)	(1.7, 6.8)	0.85
N3	(1.4, 4.2)	(0.9, 3.6)	0.78
N4	(1.1, 8.0)	(4.9, 8.1)	0.91
N6	(5.5, 6.6)	(4.9, 5.9)	0.92
N7	(3.0, 4.8)	(3.7, 4.5)	0.76
N8	(4.5, 3.1)	(5.2, 2.9)	0.94
N9	(3.8, 1.9)	(4.2, 1.3)	0.72
N10	(5.7, 8.5)	(6.7, 9.1)	1.17
N11	(7.2, 6.5)	(6.8, 5.6)	0.98
N12	(9.1, 6.8)	(8.6, 6.0)	0.94
N13	(7.2, 2.5)	(8.1, 3.4)	1.27
N14	(9.5, 2.5)	(8.8, 3.1)	0.92
N15	(7.2, 1.5)	(6.2, 0.7)	1.28