AoA	Angle of Arrival
AWGN	Additive White Gaussian Noise
CDF	Cumulative Distribution Function
CFR	Channel Frequency Response
CLF	Concentrated Likelihood Function
CRLB	Cramér–Rao Lower Bound
DA	Data-Aided
DE	Differential Evolution
DoA	Direction of Arrival
GWO	Gray Wolf Optimization
GWOEIS	Gray Wolf Optimization Embedding Importance Sampling
IS	Importance Sampling
IS-DE	Importance Sampling–Differential Evolution
IS-GWO	Importance Sampling–Gray Wolf Optimization
JADE	Joint Angle and Delay Estimation
LLF	Log-Likelihood Function
LS	Least Squares
ML	Maximum Likelihood
MSE	Mean Square Error
MUSIC	Multiple Signal Classification
NDA	Non-Data-Aided
NMSE	Normalized MSE
OFDM	Orthogonal Frequency-Division Multiplexing
PDF	Probability Density Function
RMSE	Root Mean Square Error
SAGE	Space-Alternating Generalized Expectation
SIMO	Single Input Multiple Output
SNR	Signal-to-Noise Ratio
TD	Time Delay
UAV	Unmanned Aerial Vehicles
UMP	Unitary Matrix Pencil