LBS	Location-based services
GPS	Global Positioning System
BDS	BeiDou Satellite Navigation System
UWB	Ultra-wide bandwidth
RFID	Radio frequency identification
AOA	Angle of arrival
TOA	Time of arrival
APs	Access points
UE	User equipment
LSTM	Long short-term memory
RSSI	Received signal strength indicator
TPs	Test points
RPs	Reference points
KNN	K-Nearest neighbors
WKNN	Weighted K-nearest neighbors
SVM	Support vector machines
FNN	Feedforward neural networks
SA-LSTM	Self-attention and LSTM
VSLAM	Simultaneous localization and mapping
RNN	Recurrent neural networks