Energy scavenging-aided NOMA uplink communications:
performance analysis

Energy scavenging-aided NOMA uplink communications:
performance analysis

Nonorthogonal multiple access
Outage probability
Shadowed fading
Throughput
Uplink communications

Energy scavenging-aided nonorthogonal multiple access (NOMA) networks significantly
ameliorate energy-and-spectral efficiencies thanks to superimposing a
multitude of user signals for concurrent transmission and harvesting radio frequency
energy. Practically, energy harvesters possess non-linear characteristic
and their efficiency is enhanced considerably with deployment of multiple antennas.
Moreover, communication reliability and harvested energy are directly influenced
by wireless propagation which induces simultaneous effects of shadowing,
path loss, and fading. Accordingly, the current paper assesses analytically
outage probability and throughput of energy scavenging (ES)-aided NOMA uplink
communications (eNOMAu) taking into account the above-addressed realistic
factors (κ − μ shadowed fading, multi-antenna deployment, ES nonlinearity).
The results reveal considerable performance degradation caused by
ES non-linearity and wireless propagation. Additionally, desired system performance
can be reached flexibly with appropriate specification selection. In addition,
accreting a quantity of antennas drastically mitigates the outage probability
of eNOMAu, which can be minimized with optimal ES time selection. Furthermore,
the proposed eNOMAu is considerably superior to its eOMAu counterpart.

Huu Q. Tran1, Khuong Ho-Van2

Journal homepage: http://journal.uad.ac.id/index.php/TELKOMNIKA

May 27, 2025

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