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We propose new low-fidelity (LoFi) user equipment (UE) scheduling algorithmsfor multiuser multiple-input multiple-output (MIMO) wireless communicationsystems. The proposed methods rely on an efficient guess-and-check procedurethat, given an objective function, performs paired comparisons between randomsubsets of UEs that should be scheduled in certain time slots. The proposedLoFi scheduling methods are computationally efficient, highly parallelizable,and gradient-free, which enables the use of almost arbitrary,non-differentiable objective functions. System simulations in a millimeter-wave(mmWave) multiuser MIMO scenario demonstrate that the proposed LoFi schedulersoutperform a range of state-of-the-art user scheduling algorithms in terms ofbit error-rate and/or computational complexity.

LoFi User Scheduling for Multiuser MIMO Wireless Systems