On the design of multiuser codebooks for uplink SCMA Systems

Jinchen Bao, Zheng Ma, Zhiguo Ding, George K. Karagiannidis, Zhongliang Zhu

Research output: Contribution to journalArticlepeer-review

77 Scopus citations

Abstract

Sparse code multiple access (SCMA) is a promising uplink multiple access technique that can achieve superior spectral efficiency, provided that multidimensional codebooks are carefully designed. In this letter, we investigate the multiuser codebook design for SCMA systems over Rayleigh fading channels. The criterion of the proposed design is derived from the cutoff rate analysis of the equivalent multiple-input multipleoutput system. Furthermore, new codebooks with signal-space diversity are suggested, while simulations show that this criterion is efficient in developing codebooks with substantial performance improvement, compared with the existing ones.

Original languageBritish English
Article numberA42
Pages (from-to)1920-1923
Number of pages4
JournalIEEE Communications Letters
Volume20
Issue number10
DOIs
StatePublished - Oct 2016

Keywords

  • cutoff rate
  • multidimensional constellations
  • signal-space diversity.
  • Sparse code multiple access (SCMA)

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