Application of Non-Orthogonal Multiple Access in Cooperative Spectrum-Sharing Networks over Nakagami-$m$ Fading Channels

Lu Lv, Qiang Ni, Zhiguo Ding, Jian Chen

Research output: Contribution to journalArticlepeer-review

132 Scopus citations

Abstract

This paper proposes a novel non-orthogonal multiple access (NOMA)-based cooperative transmission scheme for a spectrum-sharing cognitive radio network (CRN), whereby a secondary transmitter (ST) serves as a relay and helps transmit the primary and secondary messages simultaneously by employing NOMA signaling. This cooperation is particularly useful when the ST has good channel conditions to a primary receiver but lacks the radio spectrum. To evaluate the performance of the proposed scheme, the outage probability and system throughput for the primary and secondary networks are derived in closed forms. Simulation results demonstrate the superior performance gains for both networks thanks to the use of the proposed NOMA-based cooperative transmission scheme. It is also revealed that NOMA outperforms conventional orthogonal multiple access (OMA) and achieves better spectrum utilization.

Original languageBritish English
Article number7740931
Pages (from-to)5506-5511
Number of pages6
JournalIEEE Transactions on Vehicular Technology
Volume66
Issue number6
DOIs
StatePublished - Jun 2017

Keywords

  • Cooperative spectrum-sharing
  • Nakagami-m fading
  • non-orthogonal multiple access (NOMA)

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