EM-Based Multiuser Detection in Fast Fading Multipath Environments

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dc.citation.bibtexNamearticleen_US
dc.citation.journalTitleEURASIP Journal on Applied Signal Processingen_US
dc.contributor.authorBorran, Mohammad Jaberen_US
dc.contributor.authorAazhang, Behnaamen_US
dc.contributor.orgCenter for Multimedia Communications (http://cmc.rice.edu/)en_US
dc.date.accessioned2007-10-31T00:37:39Zen_US
dc.date.available2007-10-31T00:37:39Zen_US
dc.date.issued2002-08-01en_US
dc.date.modified2004-04-22en_US
dc.date.submitted2001-10-02en_US
dc.descriptionJournal Paperen_US
dc.description.abstractWe address the problem of multiuser detection in fast fading multipath environments for DS-CDMA systems. In fast fading scenarios, temporal variations of the channel cause significant performance degradation even with the RAKE receiver. We use a previously introduced Time-Frequency (TF) RAKE receiver based on a canonical formulation of the channel and signals to simultaneously combat fading and multipath effects. This receiver uses the Doppler spread caused by rapid time-varying channel as another means of diversity. In dealing with multiaccess interference and as an attempt to avoid the prohibitive computational complexity of the optimum Maximum-Likelihood (ML) detector, we use the Expectation Maximization (EM) algorithm to derive an approximate ML detector. The new detector turns out to have an iterative structure very similar to the well-known multistage detector, but because of using the EM algorithm, it has better convergence properties than the multistage detector.en_US
dc.description.sponsorshipNokiaen_US
dc.identifier.citationM. J. Borran and B. Aazhang, "EM-Based Multiuser Detection in Fast Fading Multipath Environments," <i>EURASIP Journal on Applied Signal Processing,</i> 2002.en_US
dc.identifier.urihttps://hdl.handle.net/1911/19743en_US
dc.language.isoengen_US
dc.subjectCDMA Systemsen_US
dc.subjectMultiuser Detectionen_US
dc.subjectEM Algorithmen_US
dc.subjectMultipath-Doppler Diversityen_US
dc.subjectTime-Frequency RAKEen_US
dc.subject.keywordCDMA Systemsen_US
dc.subject.keywordMultiuser Detectionen_US
dc.subject.keywordEM Algorithmen_US
dc.subject.keywordMultipath-Doppler Diversityen_US
dc.subject.keywordTime-Frequency RAKEen_US
dc.titleEM-Based Multiuser Detection in Fast Fading Multipath Environmentsen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
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