In this paper, the application of non-orthogonal<br> multiple access (NOMA) to millimeter-wave (mmWave) communications<br> is considered, where random beamforming is used<br> in order to reduce the system overhead. Stochastic geometry is<br> used to characterize the performance of the proposed mmWave-<br> NOMA transmission scheme, by using the key features of<br> mmWave systems, e.g., mmWave transmission is highly directional<br> and potential blockages will thin the user distribution.<br> The provided analytical and numerical results demonstrate that<br> the combination of NOMA and mmWave yields significant gains<br> in terms of sum rates and outage probabilities, compared to<br> conventional orthogonal multiple access based mmWave systems.
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