CNN	convolutional neural network
CSI	channel state information
GADF	Gramian angular difference field
GASF	Gramian angular summation field
GPU	graphics processing unit
HAR	human action recognition
IEEE	Institute of Electrical and Electronics Engineers
MTF	Markov transition field
ReLU	rectified linear unit
ResNet	residual network
RP	recurrence plot
SDR	software-defined radio
SNR	signal-to-noise ratio
SVM	support vector machine
VGG	visual geometry group