Turbo multiuser detection and equalization for coded CDMA in multipath channels

Xiaodong Wang, H. Vincent Poor

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

The presence of both multiple-access interference (MAI) and intersymbol interference (ISI) constitutes a major impediment to reliable communications in multipath CDMA channels. An iterative receiver structure is proposed for decoding multiuser information data in a convolutionally coded asynchronous multipath DS-CDMA system. The receiver performs two successive soft-output decisions, achieved by a soft-input soft-output (SISO) multiuser detector and a bank of single-user SISO channel decoders, through an iterative process. A low-complexity SISO multiuser detector is developed based on a novel nonlinear interference suppression technique, which makes use of both soft-interference cancellation and linear MMSE filtering. Simulation results demonstrate that the proposed receiver offers significant performance gain over the traditional non-iterative receiver structure. Moreover, at high SNR, the detrimental effects of MAI and ISI can be almost completely overcome by iterative processing, and single-user performance can be approached.

Original languageEnglish (US)
Title of host publicationICUPC 1998 - IEEE 1998 International Conference on Universal Personal Communications, Conference Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1123-1127
Number of pages5
ISBN (Electronic)0780351061, 9780780351066
DOIs
StatePublished - Jan 1 1998
EventIEEE International Conference on Universal Personal Communications, ICUPC 1998 - Florence, Italy
Duration: Oct 5 1998Oct 9 1998

Publication series

NameICUPC 1998 - IEEE 1998 International Conference on Universal Personal Communications, Conference Proceedings
Volume2

Other

OtherIEEE International Conference on Universal Personal Communications, ICUPC 1998
CountryItaly
CityFlorence
Period10/5/9810/9/98

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications

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