2D	Two-dimensional
AoA	Angle of arrival
BBS	Behaviour-based safety
BLE	Bluetooth low energy
CSS	Chirp spread spectrum
DoF	Degrees of freedom
EKF	Extended Kalman filter
EU-27	European Union of 27 states
IMU	Inertial measurement unit
LOS	Line of sight
MDS	Multidimensional scaling
NLOS	Non-line of sight
PPE	Personal protective equipment
PRF	Pulse repetition frequency
RFID	Radio frequency identification
RMSE	Root mean square error
RTLS	Real-time locating system
SFD	Start of frame delimiter
SLAM	Simultaneous localisation and mapping
TDMA	Time-division multiple access
TDoA	Time difference of arrival
ToA	Time of arrival
TWR	Two way ranging
UWB	Ultra-wideband