A CDMA receiver with partially adaptive multi-user detection over multipath channels

Gau J. Lin*, Ta-Sung Lee, Chan Choo Tan

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

A novel CDMA receiver with enhanced interference suppression has been proposed for pilot symbols assisted systems over multipath channels. The receiver's design involves the following procedure. First, adaptive correlators are constructed based on the generalized sidelobe canceller (GSC) scheme to collect the multipath signals and suppress strong multiple access interference (MAI). In particular, a suggested new method can successfully eliminate coexisting time-varying narrowband interference (NBI). Second, partial adaptivity is incorporated into the GSC for reduced complexity processing. Finally, a simple combiner with channel estimation gives the symbol decisions. In order to enhance the performance of the adaptive correlators, an iterative decision aided scheme is introduced which subtracts the reconstructed signal from the GSC input data. The proposed partially adaptive CDMA receiver is shown to achieve nearly the same performance of the optimal maximum SINR and MMSE receivers while using a small number of pilot symbols.

Original languageEnglish
Title of host publicationJournal of the Chinese Institute of Electrical Engineering
Pages355-367
Number of pages13
Volume9
Edition4
StatePublished - 1 Nov 2002
EventISCOM 2001 - Tainan, Taiwan
Duration: 1 Nov 2001 → …

Publication series

NameJournal of the Chinese Institute of Electrical Engineering, Transactions of the Chinese Institute of Engineers, Series E/Chung KuoTien Chi Kung Chieng Hsueh K'an
PublisherChinese Institute of Electrical Engineering
ISSN (Print)1023-4462

Conference

ConferenceISCOM 2001
CountryTaiwan
CityTainan
Period1/11/01 → …

Keywords

  • CDMA
  • Generalized sidelobe canceller
  • Interference suppression
  • Multi-user receiver
  • Partially adaptive

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