Optimal joint power and subcarrier allocation for full-duplex multicarrier non-orthogonal multiple access systems

Yan Sun, Derrick Wing Kwan Ng, Zhiguo Ding, Robert Schober

Research output: Contribution to journalArticlepeer-review

451 Scopus citations

Abstract

In this paper, we investigate resource allocation algorithm design for multicarrier non-orthogonal multiple access (MC-NOMA) systems employing a full-duplex (FD) base station for serving multiple half-duplex (HD) downlink and uplink users simultaneously. The proposed algorithm is obtained from the solution of a non-convex optimization problem for the maximization of the weighted sum system throughput. We apply monotonic optimization to develop an optimal joint power and subcarrier allocation policy. The optimal resource allocation policy serves as a system performance benchmark due to its high computational complexity. Furthermore, a suboptimal iterative scheme based on successive convex approximation is proposed to strike a balance between computational complexity and optimality. Our simulation results reveal that the proposed suboptimal algorithm achieves a close-to-optimal performance. In addition, FD MC-NOMA systems employing the proposed resource allocation algorithms provide a substantial system throughput improvement compared with conventional HD multicarrier orthogonal multiple access (MC-OMA) systems and other baseline schemes. In addition, our results unveil that FD MC-NOMA systems enable a fairer resource allocation compared with traditional HD MC-OMA systems.

Original languageBritish English
Article number7812683
Pages (from-to)1077-1091
Number of pages15
JournalIEEE Transactions on Communications
Volume65
Issue number3
DOIs
StatePublished - Mar 2017

Keywords

  • full-duplex radio
  • monotonic optimization
  • multicarrier systems
  • non-convex optimization
  • Non-orthogonal multiple access

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