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| Notation | Description |
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| Scalar (lowercase letters) |
| Vector (bold lowercase letters) |
| Matrix (bold uppercase letters) |
| PDF of the random variable |
| Expectation |
| Covariance |
| Transpose |
| Hermitian transpose |
| Determinant |
| Euclidean norm |
| Trace of a matrix |
| Circularly symmetric Gaussian random variable (: mean, : variance) |
| Circularly symmetric complex Gaussian random variable (: mean, : variance) |
| identity matrix |
| vector with zeros |
| vector with ones |
| Imaginary unit () |
| ULA interelement spacing |
| Number of UEs in the M-MIMO system |
| Number of antennas in the ULA |
| Received power at the BS |
| noise vector |
| vector containing the received samples |
| spatial correlation matrix |
| channel matrix containing the small-scale fading |
| channel matrix containing correlated entries |
| Signal matrix used for channel estimation |
| processed pilot signal vector for the th UE |
| Channel gain for the th antenna and the th UE |
| NLOS component in the channel gain for the th antenna and the th UE |
| LOS specular component in the channel gain for the th antenna and the th UE |
| Variance of real Gaussian random variables in the NLOS component of the channel gain for the th user |
| Rician factor for the fading affecting the th UE |
| AoA for the th UE |
| Angle of arriving of the planar wave at the ULA |
| Wavelength |
| SNR |
| matrix containing pilot sequences |
| th pilot sequence of length |
| Set of positive integer numbers |
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