A semidefinite relaxation approach to MIMO detection for high-order QAM constellations

Nicholas D. Sidiropoulos, Zhi Quan Luo

Research output: Contribution to journalArticle

103 Scopus citations

Abstract

A new and conceptually simple semidefinite relaxation approach is proposed for MIMO detection in communication systems employing high-order QAM constellations. The new approach affords improved detection performance compared to existing solutions of comparable worst-case complexity order, which is nearly cubic in the dimension of the transmitted symbol vector and independent of the constellation order for uniform QAM, or affine in the constellation order for nonuniform QAM.

Original languageEnglish (US)
Pages (from-to)525-528
Number of pages4
JournalIEEE Signal Processing Letters
Volume13
Issue number9
DOIs
StatePublished - Sep 1 2006

Keywords

  • High-order QAM
  • Integer least squares
  • Lattice search
  • Multi-user detection
  • Multiple-input multiple-output (MIMO) detection
  • Semidefinite programming
  • Semidefinite relaxation (SDR)

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