Forwarding Strategy Selection in Dual-Hop NOMA Relaying Systems

Yue Xiao, Li Hao, Zheng Ma, Zhiguo Ding, Zhengquan Zhang, Pingzhi Fan

Research output: Contribution to journalArticlepeer-review

38 Scopus citations


Non-orthogonal multiple-Access (NOMA) with perfect successive interference cancellation is an emerging research topic in the future wireless communication systems. In this work, NOMA is applied to dual-hop relaying systems, where the signals are transmitted with the aid of either decode-And-forward (DF) or amplify-And-forward (AF) relay. Exact expressions for outage probability and ergodic capacity are derived over independent Rayleigh fading channels, and a tight upper bound for the outage probability of AF scheme is provided. Based on the analysis, we study forwarding strategy selection for both fixed and optimized power allocation. The presented simulations verify the accuracy of the analysis, and the efficiency of the proposed forwarding strategy.

Original languageBritish English
Article number8287018
Pages (from-to)1644-1647
Number of pages4
JournalIEEE Communications Letters
Issue number8
StatePublished - Aug 2018


  • amplify-And-forward relaying
  • decode-And-forward relaying
  • forwarding strategy selection
  • Non-orthogonal multiple-Access (NOMA)


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