Power Allocation Study for Non-Orthogonal Multiple Access Networks with Multicast-Unicast Transmission

Zheng Yang, Jamal Ahmed Hussein, Peng Xu, Zhiguo Ding, Yi Wu

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

This paper considers a downlink single-cell non-orthogonal multiple access (NOMA) network, where the base station, which has multiple antennas, broadcasts the mixed multicast and unicast messages to multiple users with a single antenna. We propose two types of power allocation schemes for NOMA networks with multicast-unicast transmission to investigate the impact of performance, namely, cognitive radio inspired NOMA with dynamic quality of service (QoS) at multicast users (CR-NOMA-D-M), and CR-NOMA constrains the dynamic QoS at the unicast user (CR-NOMA-D-U). Based on the proposed schemes, we drive the exact/closed-form expressions for the secrecy outage probability, outage probability, as well as the approximate outage probability at high signal-to-noise ratio to study the diversity gain. Compared with existing works, the derived analytical results show that both proposed schemes cannot only significantly improve the outage performance for multicast users, but also remarkably enhance the diversity gain and the secrecy outage probability for the unicast user. Finally, the theoretical results are validated by the numerical results.

Original languageBritish English
Pages (from-to)3588-3599
Number of pages12
JournalIEEE Transactions on Wireless Communications
Volume17
Issue number6
DOIs
StatePublished - Jun 2018

Keywords

  • diversity gain
  • multicast-unicast transmission
  • Non-orthogonal multiple access
  • outage probability
  • secrecy outage probability

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