Direction of arrival 5 Direction of arrival estimation Numerical methods 3 Array processing 2 Array signal processing 2 Covariance matrices 2 Covariance matrix 2 Directionof-arrival (DOA) 2 Estimation 2 Millimeter waves 2 Signal processing algorithms 2 direction-of-arrival estimation 2 5G mobile communication systems 1 Accuracy enhancement 1 Adaptive algorithms 1 Adaptive beam-forming 1 Atomic norm 1 B5G mobile communication 1 Beamforming 1 Communications networks 1 Computer hardware 1 Convex optimization 1 Coprime 1 Coprime array 1 Covariance matrix regularization 1 DOA estimation 1 Degree-of-freedom 1 Degrees of freedom (mechanics) 1 Direction-of-arrival (DOA) mismatch correction 1 Direction-of-arrival estimation 1