An RSSD-Based Fingerprint Positioning Method for Detection of an Unknown Radio Transmitter Using WLS and Factor Graph

Table 2

Mean location errors of different grid distances with 4 APs.

Grid distance	RSSD-4NN	RSSD-FG	RSSD-WLSFG
1.5 m	1.42 m	1.24 m	1.06 m
2 m	1.72 m	1.45 m	1.27 m