An effective multiuser receiver for DS/CDMA systems

Zihua Guo, Khaled Letaief

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Multiuser detection (MUD) is a key technique for combating multiple access interference (MAI) in CDMA systems. In this paper, we propose a simple and effective multiuser receiver, which we shall refer to as the objective function based multiuser detector (OFMUD). This is a successive multistage joint detector based on the statistical optimization of an objective function. Two objective functions will be considered in this paper. The first one is based on a maximum likelihood solution, and the second one is based on the least squared error solution. A key feature of the proposed detector is that among all the K user bits, we update the estimate of one and only one bit (the one that is most likely to be wrong) in every stage. Analytical and numerical results will show that significant performance improvement can be achieved compared with the conventional DS/CDMA receiver. At the same time, the near-far problem is alleviated. In addition, it is shown that the proposed receiver can outperform the popular multiuser parallel interference cancellation receiver in most cases with a smaller computational cost.

Original languageEnglish
Pages (from-to)1019-1028
Number of pages10
JournalIEEE Journal on Selected Areas in Communications
Volume19
Issue number6
DOIs
Publication statusPublished - Jun 2001
Externally publishedYes

Fingerprint

Code division multiple access
Detectors
Multiple access interference
Multiuser detection
Maximum likelihood
Costs

Keywords

  • DS/CDMA
  • Interference cancellation
  • Multiple access interference
  • Multiuser detection
  • Wireless communications

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Networks and Communications

Cite this

An effective multiuser receiver for DS/CDMA systems. / Guo, Zihua; Letaief, Khaled.

In: IEEE Journal on Selected Areas in Communications, Vol. 19, No. 6, 06.2001, p. 1019-1028.

Research output: Contribution to journalArticle

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