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Millimeter wave (mmWave) systems operating over a wide bandwidth and using alarge number of antennas impose a heavy burden on power consumption. In amassive multiple-input multiple-output (MIMO) uplink, analog-to-digital con-verters (ADCs) would be the primary consumer of power in the base stationreceiver. This paper proposes a bit allocation (BA) method for mmWavemulti-user (MU) massive MIMO systems under a power constraint. We apply ADCs tothe outputs of an analog phased array for beamspace projection to exploitmmWave channel sparsity. We relax a mean square quantization error (MSQE)minimization problem and map the closed-form solution to non-negative integerbits at each ADC. In link-level simulations, the proposed method gives bettercommunication performance than conventional low-resolution ADCs for the same orless power. Our contribution is a near optimal low-complexity BA method thatminimizes total MSQE under a power constraint.

ADC Bit Allocation under a Power Constraint for MmWave Massive MIMO Communication Receivers