In this letter we consider a resource allocation problem for multi-user MIMO non orthogonal multiple access (MU-MIMO-NOMA) downlink transmissions. Under the NOMA paradigm, users are organized in clusters of strong/weak pair and our aim is to find an optimal clustering, beamforming and power allocation scheme to minimize the power transmitted subject to a rate constraint for each user. Since the joint optimization problem is intractable, we split it in three sub-problems: clustering, which is formulated as a mixed integer linear programming (MILP) problem, beamforming and power allocation. Simulations results show that the our proposed scheme greatly outperforms both the classical OMA scheme and state-of-the-art NOMA techniques.

Saggese, F., Moretti, M., & Abrardo, A. (2020). A Quasi-Optimal Clustering Algorithm for MIMO-NOMA Downlink Systems. IEEE WIRELESS COMMUNICATIONS LETTERS, 9(2), 152-156 [10.1109/LWC.2019.2946548].

A Quasi-Optimal Clustering Algorithm for MIMO-NOMA Downlink Systems

Abrardo, A.
2020

Abstract

In this letter we consider a resource allocation problem for multi-user MIMO non orthogonal multiple access (MU-MIMO-NOMA) downlink transmissions. Under the NOMA paradigm, users are organized in clusters of strong/weak pair and our aim is to find an optimal clustering, beamforming and power allocation scheme to minimize the power transmitted subject to a rate constraint for each user. Since the joint optimization problem is intractable, we split it in three sub-problems: clustering, which is formulated as a mixed integer linear programming (MILP) problem, beamforming and power allocation. Simulations results show that the our proposed scheme greatly outperforms both the classical OMA scheme and state-of-the-art NOMA techniques.
Saggese, F., Moretti, M., & Abrardo, A. (2020). A Quasi-Optimal Clustering Algorithm for MIMO-NOMA Downlink Systems. IEEE WIRELESS COMMUNICATIONS LETTERS, 9(2), 152-156 [10.1109/LWC.2019.2946548].
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11365/1095394