DFL	Device-free localization
VBI	Variational Bayesian inference
LBS	Location-based service
OFDM	Orthogonal Frequency Division Multiplexing
LTE	Long Term Evolution
SNR	Signal-to-noise ratio
CS	Compressive sensing
RIP	Restricted isometry property
RTI	Radio tomographic imaging
GMP	Greedy matching pursuit
LCS	Device-free localization based on compressive sensing
PDF	Probability density function
CG	Conjugate gradient
OMP	Orthogonal matching pursuit
E-HIPA	The energy-efficient framework for high-precision multi-target-adaptive device-free localization
VEM	Variational expectation-maximization
DR-DFL	Dictionary refinement based device-free localization
ComDec	Compressive sensing-based multi-target device-free localization
M-OMP	Multiple measurement vector orthogonal matching pursuit
MMV	Multiple measurement vector
COTS	Commercial off-the-shelf
RSS	Received signal strength
WSN	Wireless sensor networks
CSI	Channel state information
LASSO	Least absolute shrinkage and selection operator
LOS	Line-of-sight
M-SBL	Multiple sparse Bayesian learning
KLD	Kullback-Leibler divergence
M-BMP	Multiple measurement vector basic matching pursuit