On the coexistence of non-orthogonal multiple access and millimeter-wave communications

Abstract

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