Down-link NOMA networks in the presence of IQI and imperfect SIC: Receiver design and performance analysis

Malek M. Alsmadi, Najah Abu Ali, Mohammed Hayajneh, Salama S. Ikki

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


This article addresses the practical aspects that may affect the performance of down-link non-orthogonal multiple access (NOMA) systems. The system performance of two down-link NOMA users, where both users suffer from the effects of in-phase/quadrature-phase imbalance (IQI), while the first user also experiences imperfect successive interference cancellation (SIC) is examined. In order to mitigate the effects of IQI, an optimal maximum likelihood (ML) receiver is designed and analyzed, and the performance of the proposed receiver is compared with the traditional ML one. Moreover, closed-form mathematical expressions of the conditional pairwise error probability (PEP) for each user are derived. The simulation results validate the analysis and demonstrate that the proposed receiver outperforms the traditional one, with the ability to reduce the effects of IQI for both users.

Original languageEnglish
Article number9043698
Pages (from-to)6793-6797
Number of pages5
JournalIEEE Transactions on Vehicular Technology
Issue number6
Publication statusPublished - Jun 2020


  • NOMA systems
  • in-phase/quadrature-phase imbalance
  • performance analysis
  • successive interference cancellation

ASJC Scopus subject areas

  • Automotive Engineering
  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Applied Mathematics


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