User Fairness in Wireless Powered Communication Networks with Non-Orthogonal Multiple Access

Jair A. de Carvalho, Daniel B. da Costa, L. Yang, George C. Alexandropoulos, R. Oliveira, Ugo S. DIas

Research output: Contribution to journalLetterpeer-review

10 Citations (Scopus)

Abstract

This letter investigates user fairness in wireless powered communication networks (WPCNs) with non-orthogonal multiple access (NOMA) with the aim of maximizing the equal individual data rates. Initially, it is proposed the bisection method to obtain the optimal power allocation coefficients. Then, Lagrange dual-decomposition is considered for evaluating the optimal time-splitting ratio. Next, Newton's method combined with the sub-gradient method are employed to achieve the optimal solution. In addition, two sub-optimal solutions that provide a good balance between performance and complexity are proposed. Lastly, simulation results are presented to evaluate the performance of the proposed solutions.
Original languageEnglish
Article number9222214
Pages (from-to)189-193
Number of pages5
JournalIEEE Wireless Communications Letters
Volume10
Issue number1
DOIs
Publication statusPublished - Jan 2021

Keywords

  • NOMA
  • optimization
  • user fairness
  • WPCNs

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