TVD	time-varying delay
DPD	direct position determination
AOA	angle of arrival
RSS	received signal strength
TOA	time of arrival
TDOA	time difference of arrival
FDOA	frequency difference of arrival
RFDOA	rate of frequency difference of arrival
ML	maximum-likelihood
CAF	complex ambiguity function
CRLB	Cramer–Rao lower bound
RTC	relative time companding
RDC	relative Doppler companding
BPSK	binary phase shift keying
SNR	signal-to-noise ratio
RMSE	root mean squared error
FPGA	field–programmable gate array
GPU	graphics processing unit