UFPA	Federal University of Pará
LOS	Line-of-sight
NLOS	Non-line-of-sight
IOT	Internet of Things
LoRA	Long Range
MMSE	Minimum mean square error
RMSE	Root mean squared error
WSNs	Wireless sensor
5G	Fifth generation
ML	Machine learning
RNAs	Artificial neural networks
SF	Spreading factor
GRG-MAPE	Maximization of gray relationship degree and mean absolute percentage error
UAVs	Unmanned aerial vehicles
LoRaWan	Long range wide area network
SNR	Signal-to-noise ratio
Tx	Transmitter
Rx	Receiver
VV	Vertical–vertical
HH	Horizontal–horizontal
PLE	Path loss exponent
FI	Floating intercept
CI	Close in
RSSI	Received signal strength indicator
GRNN	General regression neural network
MLPNN	Multi-layer perceptron neural network