Improvement Schemes for Indoor Mobile Location Estimation: A Survey

Table 1

Accuracy comparisons of typical triangulation techniques.

Technique	System	Accuracy and precision	Range
TDOA	Zebra Dart [5]	0.3 m (50%)	200 m
AOA + TDOA	Ubisense [5]	0.3 m (99%)	30 m
ETOA	BeepBeep [15]	1-2 cm (92%)	10 m
SDS-TWR	nanoLoc [81]	1-2 m	400 m
RSS	TIX [143]	5.4 m (50%)	20–100 m