Cognitive radio	CR
Primary user	PU
Secondary user	SU
Spectrum sensing	SS
Multiband spectrum sensing	MBSS
Machine learning	ML
Software defined radio	SDR
Universal software radio peripheral	USRP
Radio environment map	REM
Cognitive radio network	CRN
Inverse Distance Weighting	IDW
Neural networks	NN
Multilayer perceptron	MLP
Multiresolution analysis	MRA
Rectified linear unit)	ReLU
Sample Entropy	SampEn
Power Spectrum Density	PSD
Step 1.1	S 1.1
Step 1.2	S 1.2
Step 1.3	S 1.3
Step 1.5	S 1.5
Step 1.6	S 1.6
Step 2.1	S 2.1
Step 2.2	S 2.2
Step 2.3	S 2.3
Step 2.5	S 2.5
Step 2.6	S 2.6
Bandwidth	B
Carrier frequency	Fc
Standard deviation	STD
F1 score	F1
True positive	TP
False positive	FP
False negative	FN
True negative	TN