A two-stage decorrelating detector for DS/CDMA systems

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

This paper presents an improved two-stage decorrelating detection scheme for direct-sequence code-division multipleaccess (DS-CDMA) systems. Decorrelator outputs corresponding to each user are tested to determine whether or not a final decision can be made with high reliability. For users with high reliability, a hard decision is made at this stage. For the remaining users, a conditional quantization algorithm is employed before a decision is made. Results indicate that significant performance enhancement can be achieved at the expense of a modest increase in computational complexity. The algorithm is also applied to synchronous as well as asynchronous multipath channels with excellent results. We also extend the two-stage decorrelating detection scheme to time-variant communication scenarios and present an adaptive version the two-stage decorrelator.

Original languageEnglish (US)
Pages (from-to)465-479
Number of pages15
JournalIEEE Transactions on Vehicular Technology
Volume50
Issue number2
DOIs
StatePublished - Mar 1 2001

Keywords

  • Adaptive methods
  • Decorrelator
  • Direct-sequence code-division multiple-access (DS/CDMA) systems
  • Multipath fading
  • Multiple-access interference (MAI)
  • Multiuser detection
  • Zero-forcing algorithm

ASJC Scopus subject areas

  • Automotive Engineering
  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Applied Mathematics

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