Abstract
Non-Orthogonal Multiple Access (NOMA) is a key multiple access technique for 5th generation (5G) mobile communication systems. In this paper, we propose a capacity-based user selection (NOMA-CUS) algorithm for multiuser multiple input single output (MISO) downlink NOMA system with zero-forcing beamforming. NOMA-CUS algorithm improves the sum rate of the NOMA system by selecting the users in each cluster based on the system sum rate improvement. Simulation results indicate that NOMA-CUS algorithm gives a very close performance to that obtained by the exhaustive search with acceptable complexity and provides better system sum rate and average matched user data rate than that of the other existing user selection algorithms.
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