  This article investigates the multiple-input multiple-output (MIMO)
non-orthogonal multiple access (NOMA) assisted unmanned aerial vehicles (UAVs)
networks. By utilizing a stochastic geometry model, a new 3-Dimension UAV
framework for providing wireless service to randomly roaming NOMA users has
been proposed. In an effort to evaluate the performance of the proposed
framework, we derive analytical expressions for the outage probability and the
ergodic rate of MIMO-NOMA enhanced UAV networks. We examine tractable upper
bounds for the whole proposed framework, with deriving asymptotic results for
scenarios that transmit power of interference sources being proportional or
being fixed to the UAV. For obtaining more insights for the proposed framework,
we investigate the diversity order and high signal-to-noise (SNR) slope of
MIMO-NOMA assisted UAV networks. Our results confirm that: i) The outage
probability of NOMA enhanced UAV networks is affected to a large extent by the
targeted transmission rates and power allocation factors of NOMA users; and ii)
For the case that the interference power is proportional to the UAV power,
there are error floors for the outage probabilities.
