Outage Performance of Generalized Cooperative NOMA Systems with SWIPT in Nakagami-m Fading

Published online: Dec 20, 2018
Full Text: PDF (779 KiB)
DOI: 10.24138/jcomss.v14i4.632
Authors:
Nouha Dahi, Noureddine Hamdi

Abstract

This paper investigates cooperative non-orthogonal multiple access (NOMA) with simultaneous wireless information and power transfer (SWIPT) radio networks. A decode-andforward relay deserves a base station to transmit information to two users. Two access schemes are addressed: direct and relay assisted transmission (DRAT) where a line-of-sight exists between the source and destination, and non-direct and relay assisted transmission (nDRAT) where the only access to the final users is through the relay. New closed-form expressions of outage probability are derived at these schemes. A generalization using Nakagami-m fading channels in considered, in order to present a complete cover of relayed NOMA systems with energy harvesting behavior in small scale fading. We consider the impact of time splitting fraction, power allocation and channel parameters on system maintainability and evaluate its maximum data rate transmission with full autonomy. By comparing the two schemes, cooperative NOMA with energy harvesting (EH) in nDRAT scenario outperforms transmission with direct link in terms of outage probability and transmission data rate.

Keywords

Nakagami-m fading, simultaneous wireless information and power transfer, decode-and-forward, non-orthogonal multiple access, Energy harvesting, Outage Probability.
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