Bit-Interleaved Coded SCMA with Iterative Multiuser Detection: Multidimensional Constellations Design

Jinchen Bao, Zheng Ma, Ming Xiao, Theodoros A. Tsiftsis, Zhongliang Zhu

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


This paper investigates the constellation/codebook design of a promising uplink multiple access technique, sparse code multiple access (SCMA), proposed for the fifth generation (5G) mobile networks. The application of bit-interleaved coded modulation (BICM) with iterative multiuser detection is considered, for uplink SCMA over fading channels. Extrinsic information transfer (EXIT) chart is used to aid the analysis and design of multidimensional constellations, and design criteria for multidimensional constellations and labelings optimization are thus established. Furthermore, a new and simple approach of multi-stage optimization for the multidimensional constellation design is proposed for SCMA, to improve the bit-error rate (BER) performance and alleviate the complexity of turbo multiuser detection. Numerical and simulation results are also provided to demonstrate the performance and verify the efficiency of the proposed scheme, compared to the state of the art.

Original languageEnglish
JournalIEEE Transactions on Communications
Publication statusAccepted/In press - Dec 9 2017


  • Bit-interleaved coded modulation (BICM)
  • Detectors
  • extrinsic information transfer (EXIT) chart
  • Fading channels
  • Labeling
  • multidimensional constellations
  • Multiuser detection
  • Optimization
  • Receivers
  • sparse code multiple access (SCMA)
  • turbo multiuser detection
  • Uplink

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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