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dc.contributor.authorBorran, Mohammad Jaber
Aazhang, Behnaam
dc.creatorBorran, Mohammad Jaber
Aazhang, Behnaam
dc.date.accessioned 2007-10-31T00:37:39Z
dc.date.available 2007-10-31T00:37:39Z
dc.date.issued 2002-08-01
dc.date.submitted 2001-10-02
dc.identifier.urihttps://hdl.handle.net/1911/19743
dc.description Journal Paper
dc.description.abstract We 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.
dc.description.sponsorship Nokia
dc.language.iso eng
dc.subjectCDMA Systems
Multiuser Detection
EM Algorithm
Multipath-Doppler Diversity
Time-Frequency RAKE
dc.title EM-Based Multiuser Detection in Fast Fading Multipath Environments
dc.type Journal article
dc.citation.bibtexName article
dc.citation.journalTitle EURASIP Journal on Applied Signal Processing
dc.date.modified 2004-04-22
dc.contributor.orgCenter for Multimedia Communications (http://cmc.rice.edu/)
dc.subject.keywordCDMA Systems
Multiuser Detection
EM Algorithm
Multipath-Doppler Diversity
Time-Frequency RAKE
dc.type.dcmi Text
dc.type.dcmi Text
dc.identifier.citation M. J. Borran and B. Aazhang, "EM-Based Multiuser Detection in Fast Fading Multipath Environments," EURASIP Journal on Applied Signal Processing, 2002.


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    Publications by Rice University Electrical and Computer Engineering faculty and graduate students

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