BR	Breath rate
HR	Hearth rate
BP	Blood pressure
OSAS	Obstructive sleep apnea syndrome
SIDS	Sudden infant death syndrome
SUID	Sudden unexpected infant death
WHO	World health organization
COPD	Cognitive obstructive pulmonary disease
HRV	Hearth rate variability
ECG	Electrocardiogram
EDR	ECG-driven respiration
AFE	Analog front-end
DSP	Digital signal processing
MA	Motion artifact
PPG	Photoplethysmogram
LED	Light-emitting-diode
IR	Infrared
DC	Direct-current
VPG	Video-plethysmography
RGB	Red-green-blue
ROI	Region-of-interest
SAW	Surface acoustic wave
FBG	Fiber Bragg grating
AC	Alternative-current
MEMS	Microelectromechanical systems
3D	three-dimensional
PCG	Phonocardiography
CW	Continuous-wave
FPGA	Field-programmable gate array
FMCW	Frequency-modulated Continuous-wave
SFCW	Stepped-frequency continuous-wave
Rx	Receiver
Tx	Transmitter
LO	Local oscillator
IF	intermediate frequency
SSB	Single sideband
DSB	Double sideband
AD	Arctangent Demodulation
CSD	Complex signal demodulation
I	In-phase
Q	Quadrature
RBM	Random body movement
EMD	Empirical mode decomposition
VCO	Voltage-controlled oscillator
PLL	Phase-locked-loop
VNA	Vector network analyzer
UWB	Ultra-wideband
IR-UWB	Impulse radio ultra-wideband
FFT	Fast Fourier transform
IFFT	Inverse Fast-Fourier transform
FCC	Federal communication committee
ECC	European electronic communication commission
SUT	Subject-under-test
ADC	Analog-to-digital converter
VGA	Variable-gain amplifier