Fairness Aware User Selection for Uplink MU-MIMO Systems with ZF Beamforming

In this letter, we develop semi-orthogonal user selection (SUS) algorithm using CDF-based scheduling to enhance fairness in an uplink multi-user multiple-input multiple-output (MU-MIMO) system. The proposed scheduling algorithm closely approaches to the sum capacity of the conventional SUS algorithm, but improving fairness with low complexity. Simulation results demonstrate that the propose algorithm effectively strikes a balance among sum capacity, fairness, and complexity in the MU-MIMO system using zero-forcing beamforming (ZFBF).