Index Modulation Aided Uplink NOMA for Massive Machine Type Communications

Muhammad Basit Shahab, Sarah J. Johnson, Mahyar Shirvanimoghaddam, Marwa Chafii, Ertugrul Basar, Mischa Dohler

Research output: Contribution to journalArticlepeer-review


Single-carrier frequency-division multiple access (SC-FDMA) based index modulation (IM), referred here as SC-IM, allows users to implicitly transmit a part of their data bits by switching on some of their allocated subcarriers, followed by {M}-Ary constellation symbols transmission over the activated subcarriers. This sparse use of subcarriers provides better energy efficiency and error rate. Using these benefits, this letter exploits SC-IM with uplink power domain non-orthogonal multiple access (NOMA), where all users with the same allocated subcarrier set can simultaneously transmit their SC-IM data with different power levels, which are exploited by the receiver to perform multi-user detection. Performance of the proposed technique is analyzed and compared with conventional NOMA. It is shown that the proposed scheme can achieve energy efficient massive connectivity, which is a primary requirement for massive machine-Type communications.

Original languageEnglish (US)
Article number9165182
Pages (from-to)2159-2162
Number of pages4
JournalIEEE Wireless Communications Letters
Issue number12
StatePublished - Dec 2020


  • Index modulation (IM)
  • massive machine-Type communications (mMTC)
  • non-orthogonal multiple access (NOMA)
  • single-carrier frequency-division multiple access (SC-FDMA)

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering


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