NOMA Throughput and Energy Efficiency in Energy Harvesting Enabled Networks

Ali Arshad Nasir, Hoang Duong Tuan, Trung Q. Duong*, Merouane Debbah

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

50 Scopus citations

Abstract

An energy harvesting (EH) enabled network is capable of delivering energy to users, who are located sufficiently close to the base stations. However, wireless energy delivery requires much more transmit power than what the normal information delivery does. It is very challenging to provide the quality of wireless information and power delivery simultaneously. It is of practical interest to employ non-orthogonal multiple access (NOMA) to improve the network throughput, while fulfilling the EH requirements. To realize both the EH and information decoding, this paper considers a transmit time-switching (transmit-TS) protocol. Two important problems of users' max-min throughput optimization and energy efficiency maximization under power constraint and EH thresholds, which are non-convex in beamforming vectors, are addressed by efficient path-following algorithms. In addition, the conventional power splitting (PS)-based EH receiver is also considered. The provided numerical results confirm that the proposed transmit-TS-based algorithms clearly outperform the PS-based algorithms in terms of throughput and energy efficiency.

Original languageEnglish
Article number8723543
Pages (from-to)6499-6511
Number of pages13
JournalIEEE Transactions on Communications
Volume67
Issue number9
DOIs
StatePublished - Sep 2019

Bibliographical note

Publisher Copyright:
© 1972-2012 IEEE.

Keywords

  • Wireless power delivery
  • energy efficiency
  • energy harvesting
  • non-orthogonal multiple access (NOMA)
  • nonconvex optimization
  • quality-of-service (QoS)
  • throughput
  • transmit time-switching

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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