Downlink multi-carrier NOMA with opportunistic bandwidth allocations

Haitham Al-Obiedollah, Kanapathippillai Cumanan, Haythem Bany Salameh, Gaojie Chen, Zhiguo Ding, Octavia A. Dobre

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


Multi-carrier non-orthogonal multiple access (MC-NOMA) system has been considered as a promising candidate in future wireless networks. In a MC-NOMA system, the available bandwidth of transmission is divided into several sub-bands, such that multiple users in each sub-band are served based on power-domain NOMA. Unlike the equal sub-band allocations, we propose a sum-rate maximization technique that jointly allocates the available power and bandwidth with opportunistic sharing between the sub-bands. A second-order cone program approach is exploited to deal with the non-convexity issues of the corresponding optimization problem. Simulation results reveal that the MC-NOMA system with opportunistic bandwidth allocation outperforms the scheme with the equal bandwidth allocation in terms of achieved sum-rate.

Original languageBritish English
Pages (from-to)2426-2429
Number of pages4
JournalIEEE Wireless Communications Letters
Issue number11
StatePublished - 1 Nov 2021


  • multi-carrier NOMA
  • Non-orthogonal multiple access (NOMA)


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