Multi-user detection for the downlink of NOMA systems with multi-antenna schemes and power-efficient amplifiers

Filipe Casal Ribeiro, João Guerreiro, Rui Dinis, Francisco Cercas, Dushantha Nalin K. Jayakody

Research output: Contribution to journalArticle

5 Citations (Scopus)


Non-orthogonal multiple access (NOMA) schemes have been recognized as a promising multiple access method for the fifth generation (5G) communication systems. In NOMA, multiple users can share the same physical channel, which allows for a substantial increase in capacity gains when comparing to conventional orthogonal multiple access (OMA) techniques. This paper considers the downlink transmission of NOMA schemes combined with single-carrier (SC) signals. We present a multi-antenna transmission technique that is compatible with highly efficient power amplifiers without requiring any pre-processing. Furthermore, a multi-user detection scheme based on iterative frequency-domain equalization (FDE) is presented. We show that besides the high power-efficiency of the transmission scheme, the system's performance can be close to the matched filter bound (MFB).

Original languageEnglish
Pages (from-to)199-205
Number of pages7
JournalPhysical Communication
Publication statusPublished - 1 Apr 2019



  • Efficient power amplification
  • Iterative frequency-domain detection
  • Multi-antenna systems
  • NOMA
  • SC-FDE

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this