Rapid detection and suppression of multi-user interference in DS-CDMA

Michael L. Honig*

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

6 Scopus citations

Abstract

Minimum Mean Squared Error (MMSE) detection has been proposed for Direct Sequence-Code Division Multiple Access (DS-CDMA) system. MMSE detectors rely on a known training sequence for initial adaptation, and subsequently switch to decision-directed mode. After the switch, the performance of the adaptive algorithm may degrade if a strong interference suddenly appears. Hence, this paper presents a 'rescue' algorithm that monitors for sudden changes in the signal space, which may be caused by the appearance of a strong interference. It is shown that the presence of low-level background noise, a good estimate can be obtained within a few symbol intervals. A numerical example is given which illustrate the performance of the rescue algorithm in a synchronous DS-CDMA system.

Original languageEnglish (US)
Pages (from-to)1057-1660
Number of pages604
JournalICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
Volume2
StatePublished - Jan 1 1995
EventProceedings of the 1995 20th International Conference on Acoustics, Speech, and Signal Processing. Part 2 (of 5) - Detroit, MI, USA
Duration: May 9 1995May 12 1995

ASJC Scopus subject areas

  • Software
  • Signal Processing
  • Electrical and Electronic Engineering

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