Energy-Efficient Hybrid Precoding for mmWave Multi-User Systems
作者： Vu Nguyen Ha , Duy H. N. Nguyen , Jean-Francois Frigon
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摘要: This paper aims to study an energy-efficiency (EE) maximization hybrid precoding (HP) design for mmWave multi-user (MU) systems where the analog (AP) matrix is realized by a number of switches and phase shifters so that connection between RF chain transmit antenna can be switched off energy saving. By explicitly considering effect each on required power digital (DP) AP process, we describe total consumption as sparsity form matrix. Together with novel sparsity-modulus constraints matrix, these terms make our system EE (SEEM) problem non-convex challenging solve. To tackle SEEM problem, first transform it into subtractive-form weighted sum rate (WSRP) problem. We then exploit alternating minimization mean-squared error algorithm solve WSRP DP vectors are updated alternatively, compressed sensing-based re-weighted quadratic- relaxation method employed deal parts constraints.
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