Research Article

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

Table 3

Mean location errors of different APs with 1.5 m grid distance.

AP numbers RSSD-4NN RSSD-FG RSSD-WLSFG

3 APs 1.79 m 1.55 m 1.31 m
4 APs 1.36 m 1.19 m 1.09 m