Spatial Modulation-Aided Cooperative NOMA: Performance Analysis and Comparative Study

Qiang Li, Miaowen Wen, Ertugrul Basar, H. Vincent Poor, Fangjiong Chen

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

The combination of non-orthogonal multiple access (NOMA) and multiple-input multiple-output (MIMO) signaling is capable of providing significantly improved spectral efficiency and effective multiple access. However, conventional MIMO-NOMA entails significantly increased power consumption and implementation complexity. Inspired by the essence of spatial modulation (SM), in this paper, a novel three-node cooperative relaying system (CRS) using SM-aided NOMA, termed CRS-SM-NOMA, is proposed, in which the messages for two users are conveyed by two different information-bearing units of SM. As the reference scheme, conventional CRS-NOMA is further re-investigated with multiple receive antennas. Besides the achievable rate, which is adopted by most of the existing NOMA works as the performance metric, the bit error rate (BER) of CRS-SM-NOMA and CRS-NOMA is analyzed assuming maximum-likelihood detection. Approximate bit error probability expressions are derived in closed form for both users. Simulation results verify the analysis and show that the proposed CRS-SM-NOMA outperforms conventional CRS-NOMA and SM-OMA in terms of the BER as well as ergodic sum rate.

Original languageEnglish (US)
Article number8636968
Pages (from-to)715-728
Number of pages14
JournalIEEE Journal on Selected Topics in Signal Processing
Volume13
Issue number3
DOIs
StatePublished - Jun 2019

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Electrical and Electronic Engineering

Keywords

  • Bit error rate
  • cooperative relaying
  • non-orthogonal multiple access
  • spatial modulation
  • sum rate

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