5G	5th-Generation Mobile Communication Technology
GPS	Global Positioning System
GNSS	Global Navigation Satellite System
5G NR	5th-generation New Radio
TOA	Time of Arrival
TDOA	Time Difference of Arrival
AOA	Angle of Arrival
RSSI	Received Signal Strength Indication
CSI	Channel State Information
RSRP	Reference Signal Received Power
RSRQ	Reference Signal Quality
5G-PECNN	Positioning Error Correction Neural Network for 5G
AGGD	Adaptive Global Gradient Descent
BP	Backpropagation Neural Network
ReLU	Rectified Linear Unit
MSE	Mean squared error