A joint-channel diagonalization for multiuser MIMO antenna systems

Kai Kit Wong, Ross D. Murch, Khaled Ben Letaief

Research output: Contribution to journalArticle

177 Citations (Scopus)


In this paper, we address the problem of improving the performance of multiuser space-division multiplexing (SDM) systems where multiple independent signal streams can be transmitted in the same frequency and time slot. The problem is important in multiuser multiple-input multiple-output systems where communication from one base station to many mobile stations can occur simultaneously. Our objective is to devise a multiuser linear space-time precoder for simultaneous channel diagonalization of the multiuser channels enabling SDM. Our new approach is based on diagonalizing the multiuser channel matrices and we use a variation of successive Jacobi rotations. In addition to the diagonalization, our approach attempts to optimize the resultant channel gains for performance enhancement. Our method is valid for both frequency-flat and frequency-selective fading channels but we assume that the base station knows all the channels and that they are quasi-stationary.

Original languageEnglish
Pages (from-to)773-786
Number of pages14
JournalIEEE Transactions on Wireless Communications
Issue number4
Publication statusPublished - 1 Jul 2003



  • Capacity
  • Co-channel interference (CCI)
  • Diversity
  • Joint-channel diagonalization (JCD)
  • Multiple-input multiple-output (MIMO)
  • Multiuser communications
  • Smart antennas
  • Space-division multiplexing (SDM)
  • Spectral efficiency

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

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