Improved group multiuser detection with multiple receive antennas in the presence of improper multi-access interference

Sana Sfar, Khaled Letaief

Research output: Contribution to journalArticle

11 Citations (Scopus)


We consider the transmission of K binary phase-shift keying signals over M diversity channels through a rich scattering environment. Improved group detection rules are proposed to mitigate the effect of the improper multiaccess interference, and an enhancement of the system receive diversity order is shown to be obtained. For example, it is demonstrated that a further gain of ḡ /2 per group is obtained compared with conventional group detection, where ḡ is the interfering group size. In addition, when there is only one antenna per group, the considered receiver with the improved detection rules is equivalent to the decorrelator. In this case, it is shown that (K - 1) interferers can be nulled out, and that an M - K-1/2 receive diversity order is achieved, compared with only M - K + 1 with the conventional detection rules. Numerical results will further put in evidence such gains.

Original languageEnglish
Pages (from-to)560-563
Number of pages4
JournalIEEE Transactions on Communications
Issue number4
Publication statusPublished - Apr 2005
Externally publishedYes



  • Antenna arrays
  • Binary phase-shift keying (BPSK) modulation
  • Diversity gain
  • Group detection
  • Multiple-input multiple-output (MIMO) systems
  • Multiuser detection (MUD)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Networks and Communications

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