Finite memory-length linear multiuser detection for asynchronous CDMA communications

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dc.citation.bibtexNamearticleen_US
dc.citation.firstpage848
dc.citation.issueNumber7en_US
dc.citation.journalTitleIEEE Transactions on Communicationsen_US
dc.citation.lastpage858
dc.citation.volumeNumber45en_US
dc.contributor.authorJuntti, Markku J.en_US
dc.contributor.authorAazhang, Behnaamen_US
dc.contributor.orgCenter for Multimedia Communications (http://cmc.rice.edu/)en_US
dc.date.accessioned2007-10-31T00:48:49Z
dc.date.available2007-10-31T00:48:49Z
dc.date.issued1997-10-20
dc.date.modified2003-11-10en_US
dc.date.submitted2001-10-17en_US
dc.descriptionJournal Paperen_US
dc.description.abstractDecorrelating, linear, minimum mean-squared error (LMMSE), and noise-whitening multiuser detectors for code-division multiple-access systems (CDMA) are ideally infinite memory-length (referred to as IIR) detectors. To obtain practical detectors, which have low implementation complexity and are suitable for CDMA systems with time-variant system parameters (e.g., the number of users, the delays of users, and the signature waveforms), linear finite-memory-length (referred to as FIR) multiuser detectors are studied in this paper. They are obtained by truncating the IIR detectors or by finding optimal FIR detectors. The signature waveforms are not restricted to be time-invariant (periodic over symbol interval). Thus, linear multiuser detection is generalized to systems with spreading sequences longer than the symbol interval. Conditions for the stability of the truncated detectors are discussed. Stable truncated detectors are shown to be near-far resistant if the received powers are upper bounded, and if the memory length is large enough (but finite). Numerical examples demonstrate that moderate memory lengths are sufficient to obtain the performance of the IIR detectors even with a severe near-far problem.en_US
dc.description.sponsorshipNokiaen_US
dc.identifier.citationM. J. Juntti and B. Aazhang, "Finite memory-length linear multiuser detection for asynchronous CDMA communications," <i>IEEE Transactions on Communications,</i> vol. 45, no. 7, 1997.
dc.identifier.doihttp://dx.doi.org/10.1109/26.592564en_US
dc.identifier.urihttps://hdl.handle.net/1911/19995
dc.language.isoeng
dc.subjectCode-division multiaccess (CDMA)*
dc.subjectlinear multiuser detector*
dc.subjectspread spectrum communication*
dc.subjectDecorrelating*
dc.subjectlinear*
dc.subjectminimum mean-squared error (LMMSE)*
dc.subject.keywordCode-division multiaccess (CDMA)en_US
dc.subject.keywordlinear multiuser detectoren_US
dc.subject.keywordspread spectrum communicationen_US
dc.subject.keywordDecorrelatingen_US
dc.subject.keywordlinearen_US
dc.subject.keywordminimum mean-squared error (LMMSE)en_US
dc.titleFinite memory-length linear multiuser detection for asynchronous CDMA communicationsen_US
dc.typeJournal article
dc.type.dcmiText
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