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Table 4 Mean location errors of different APs with 1.5-m grid distance

From: RSSD-based 3-D localization of an unknown radio transmitter using weighted least square and factor graph

Number of APs RSSD-KNN RSSD-FG RSSD-WLSFG
3 APs 1.83 m 1.71 m 1.56 m
4 APs 1.51 m 1.35 m 1.12 m
5 APs 1.43 m 1.28 m 1.05 m