Performance analysis of non-orthogonal multiple access based vertical heterogeneous network.
Abstract
The future wireless networks promise to provide massive connections and higher spectral
efficiency requirements to a multitude of devices with diversified traffic patterns wherever
and whenever needed, various studies have been conducted on suitable technological
advancement techniques such as Non-Orthogonal Multiple Access (NOMA), millimeter
wave communication (mm Wave),visible Light communication(VLC), Massive MIMO
(Multiple-Input Multiple-Output).Unmanned aerial vehicles (UAVs) based non-orthogonal
multiple access (NOMA) transmission is also one of promising ways which has recently
gained significant interests to leverage the strength of line-of-sight links and improve the
coverage as well as maximize the throughput of wireless communications systems due to
their mobility, flexibility in deployment and low cost. In this work we explore the potential
benefits of deploying unmanned aerial vehicles (UAVs) as aerial base stations (ABSs) to
assist the over loaded terrestrial base stations (TBSs) with non-orthogonal multiple access
(NOMA) based scheme in cooperated into the network. We determined the performance
evaluation in terms of spectral and energy efficiencies of the NOMA against that of OMA
(Orthogonal Multiple Access) network based on the Rayleigh fading channel condition. By
using tools from stochastic geometry and MATLAB software to model the spatial
distribution of base stations (BSs), user equipment’s (UEs), their respective channel
conditions in the environment, system design, algorithm implementation and finally for
performance analysis for the characterized UAV aided networks based on NOMA and OMA
under the Air-to-Ground (A2G) and Ground-to-Ground (G2G) channel models.
Simulation results reveal that the performance of the NOMA- based VHetNet out performs
the OMA-based VHetNet.