Successive interference cancellation for multiuser asynchronous DS/CDMA detectors in multipath fading links

Andrew L C Hui, Khaled Letaief

Research output: Contribution to journalArticle

173 Citations (Scopus)

Abstract

In recent years there has been an increasing interest in the use of code-division multiple access (CDMA) in cellular mobile and wireless personal communications. The choice of such multiaccess technique is attractive because of its potential capacity increases and other technical factors such as privacy and multipath rejection capabilities. However it is well known that the performance of CDMA can be significantly degraded due to cochannel interference (CI) and the near-far effects. In this paper we consider the performance of direct-sequence (DS)based CDMA over fading channels that are modeled as slowly varying Rayleigh-fading discrete multipath channels. Specifically we propose and analyze an adaptive multistage interference cancellation strategy for the demodulation of asynchronous DS spread-spectrum multiple-access signals. Numerical results will show that the proposed multistage detector which alleviates the detrimental effects of the near-far problem can significantly improve the system performance.

Original languageEnglish
Pages (from-to)384-391
Number of pages8
JournalIEEE Transactions on Communications
Volume46
Issue number3
DOIs
Publication statusPublished - 1998
Externally publishedYes

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Keywords

  • Cochannel interference cancellation
  • Code-division multiple access
  • Multiuser detection
  • Wireless communications

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Networks and Communications

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