4G	fourth-generation
5G	fifth-generation
6G	sixth-generation
AF	amplify-and-forward
ALS	alternating least squares
Bi-ALS	bi-alternating least squares
CDMA	code division multiplexing access
CSI	channel state information
DF	decode-forward
DFT	discrete Fourier transform
DKRF	double KRF
HONTD	high-order nested Tucker decomposition
IoT	internet of things
KRF	Khatri–Rao factorization
KRST	Khatri–Rao space-time
KRSTF	Khatri–Rao space-time-frequency
KronF	Kronecker factorization
LM	Levenbergh–Marquardt
LS	least squares
LSKP	LS estimation of Kronecker products
MIMO	multiple input multiple output
MKRF	multiple Khatri–Rao factorization
MKRSM	multiple Khatri–Rao product of symbol matrices
MKRST	multiple Khatri–Rao space–time
MKronST	multiple Kronecker space–time
MSMKron	multiple symbol matrices Kronecker product
NMSE	normalized mean square error
OFDM	orthogonal frequency division multiplexing
PARAFAC	parallel factors analysis
QAM	quadrature amplitude modulation
PSK	phase-shift keying
SER	symbol error rate
SNR	signal-to-noise ratio
ST	space–time
SVD	signal value decomposition
TD	Tucker decomposition
THOSVD	truncated higher-order singular value decomposition
TSTF	tensor space–time frequency
ZF	zero-forcing