A novel multiuser detection using group classification with smart antennas for multi-carrier CDMA systems

Junqiang Li, Khaled Letaief, Zhigang Cao

Research output: Contribution to journalArticle


The capacity of MC-CDMA communication systems can be significantly enhanced by employing multiuser detection (MUD) techniques. In this paper, a group oriented MUD based on the combination of smart antennas and multiuser detection is presented. The proposed method is featured as a novel technique for further improving the system capacity and performance. In this method, all the users are first divided into several groups according to their impinging Direction of arrivals (DOA). All users with similar DOAs are classified into the same group and then MUD is employed in each group in parallel. Because spatial filtering cannot suppress all the interference between the groups, interference cancellation among groups is used prior to MUD within the groups. It is shown that the proposed group oriented MUD algorithm can significantly reduce the computational complexity and processing time delay compared with the conventional MUD schemes. Furthermore, it is demonstrated that significant performance improvement can be achieved.

Original languageEnglish
Pages (from-to)208-214
Number of pages7
JournalChinese Journal of Electronics
Issue number2
Publication statusPublished - Apr 2003
Externally publishedYes



  • Multi-carrier CDMA
  • Multiuser detection
  • Smart antennas
  • Wireless communication systems

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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