Performance Study of Cognitive Relay NOMA Networks with Dynamic Power Transmission

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

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


The cooperative non-orthogonal multiple access (NOMA) networks with one pair primary user and one pair cognitive user share the same spectrum resource via a common relay is considered in this paper. We propose a dynamic power transmission scheme for both uplink and downlink NOMA transmission in cognitive relay networks, which preserves the quality of service for the primary user. The closed-form expressions of overall outage probability and average sum rate for the proposed dynamic power transmission scheme of cognitive relay NOMA networks are derived. Both developed analytical results and Monte Carlo simulations show that the proposed dynamic power control scheme can dramatically enhance performance gain for the proposed networks, compared to other existing NOMA power allocation schemes.

Original languageBritish English
Article number9357971
Pages (from-to)2882-2887
Number of pages6
JournalIEEE Transactions on Vehicular Technology
Issue number3
StatePublished - Mar 2021


  • Average sum rate
  • cognitive relay networks
  • non-orthogonal multiple access
  • outage probability


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