Secure NOMA Based Two-Way Relay Networks Using Artificial Noise and Full Duplex

Beixiong Zheng, Miaowen Wen, Cheng-Xiang Wang, Xiaodong Wang, Fangjiong Chen, Jie Tang, Fei Ji

Research output: Contribution to journalArticlepeer-review

117 Citations (Scopus)
171 Downloads (Pure)


In this paper, we develop a non-orthogonal multiple access (NOMA)-based two-way relay network with secrecy considerations, in which two users wish to exchange their NOMA signals via a trusted relay in the presence of single and multiple eavesdroppers. To ensure secure communications, the relay not only forwards confidential information to the legitimate users but also keeps emitting jamming signals all the time to degrade the performance of any potential eavesdropper. Moreover, we equip the relay and each user with the full-duplex technique in the multiple-access phase to combat the eavesdropping and improve the data transmission efficiency, respectively.We propose different decoding schemes based on the successive interference cancellation (SIC) for the legitimate users, relay, and eavesdroppers. Closed-form expressions for the achievable ergodic secrecy rates of all data symbols under both single- and multipleeavesdropper cases are derived, validated by the excellent fitting to the computer simulation results for our proposed network.

Original languageEnglish
Pages (from-to)1426-1440
Number of pages15
JournalIEEE Journal on Selected Areas in Communications
Issue number7
Early online date9 Apr 2018
Publication statusPublished - Jul 2018


  • artificial noise
  • Decoding
  • Eavesdropping
  • full-duplex
  • Jamming
  • NOMA
  • non-orthogonal multiple access (NOMA)
  • Physical layer security
  • Relay networks (telecommunications)
  • Security
  • two-way relay networks

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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