A Hybrid Downlink NOMA with OFDM and OFDM-IM for beyond 5G Wireless Networks

Tusha A., Dogan S., ARSLAN H.

IEEE Signal Processing Letters, vol.27, pp.491-495, 2020 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 27
  • Publication Date: 2020
  • Doi Number: 10.1109/lsp.2020.2979059
  • Journal Name: IEEE Signal Processing Letters
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Applied Science & Technology Source, Communication Abstracts, Compendex, Computer & Applied Sciences, INSPEC, Metadex, Civil Engineering Abstracts
  • Page Numbers: pp.491-495
  • Keywords: OFDM, Receivers, Silicon carbide, NOMA, Multiuser detection, Downlink, NOMA, OFDM, index modulation, OFDM-IM, SIC, user pairing, ML receiver
  • Istanbul Medipol University Affiliated: Yes


In this paper, a hybrid power domain non-orthogonal multiple accessing (NOMA) scheme by the superposition of orthogonal frequency division multiple accessing (OFDM) and index modulated OFDM (OFDM-IM) technologies is presented and named IM-NOMA. It is shown via both computer-based simulations and mathematical analysis that IM-NOMA outperforms the classical OFDM-NOMA in terms of bit error rate (BER) under a total power constraint and achievable sum rate. The system performance of IM-NOMA not only depends on the power difference between the overlapping users but also on features of the OFDM-IM signal. Hence, this scheme is robust against possible catastrophic error performance in case similar power is assigned to the users.