BCG	ballistocardiography
cbPPG	camera-based photoplethysmography
cECG	capacitive electrocardiogram
CW	continuous wave
ECG	electrocardiogram
EMD	empirical mode decomposition
EMFi	electromechanical film
EPIC	electric potential integrated circuit
FCC	Federal Communications Commission
FIR	far infrared light
HRV	heart rate variability
ICA	independent component analysis
iPPG	imaging photoplethysmography
IRT	infrared thermography
ISM	industrial, scientific and medical
KIT	Karlsruhe Institute of Technology
LED	light-emitting diode
LWIR	long wave infrared light
MI	magnetic impedance
MWIR	medium wave infrared light
ncPPG	non-contact photoplethysmography
NIR	near infrared light
PAT	pulse arrival time
PD	photodetector
PERCLOS	percentage eye closure
PPG	photoplethysmogram
PPGI	photoplethysmography imaging
PTT	pulse transit time
QL	quality label
RADAR	radio detecting and ranging
rPPG	reflective or remote photoplethysmography
RSA	respiratory sinus arrhythmia
Rx	receiver
SpO2	oxygen saturation
SVM	support vector machine
tPPG	transmissive photoplethysmography
Tx	transmitter
UWB	ultra-wide band
VIS	visible light