Multiuser detection for CDMA systems with convolutional coding

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dc.contributor.authorYang, Ningen
dc.contributor.committeechairWoerner, Brian D.en
dc.contributor.committeememberGray, Festus Gailen
dc.contributor.committeememberRappaport, Theodore S.en
dc.contributor.departmentElectrical Engineeringen
dc.date.accessioned2014-03-14T21:30:44Zen
dc.date.adate2009-03-04en
dc.date.available2014-03-14T21:30:44Zen
dc.date.issued1995en
dc.date.rdate2009-03-04en
dc.date.sdate2009-03-04en
dc.description.abstractIn Code Division Multiple Access (COMA) systems, the multiple access interference limits the capacity of current systems which use a matched filter or correlation receiver. It has been shown by previous research that multiuser detection receivers employing interference cancellation techniques can significantly improve the capacity of COMA systems. Error correction coding is also an important technique for overcoming severe channel degradation. In this project, we investigate the performance of multiuser receivers which use the combination of interference cancellation techniques and error correction codes. Specifically, we look at the combination of multistage interference cancellation and convolutional coding. Two different combination schemes are proposed and the performance of these two schemes is studied. The first scheme is a partitioned approach where the multistage interference cancellation is in front of the decoder and is performed on the coded data. The second scheme is an integrated approach where the decoded data is used to reconstruct the transmitted signals in order to do interference cancellation. Both of these two schemes result in significant performance improvement over a receiver using either multistage interference cancellation or convolutional coding techniques only, for a reasonable range of operating points. The first scheme is recommended due to its soft-decision estimation of transmitted signal and implementation considerations. The analytical results for the first scheme are presented. Simulation results for both of these two schemes are obtained and compared.en
dc.description.degreeMaster of Scienceen
dc.format.extentxi, 132 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-03042009-040425en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-03042009-040425/en
dc.identifier.urihttp://hdl.handle.net/10919/41391en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1995.Y366.pdfen
dc.relation.isformatofOCLC# 34598807en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectinterference cancellationen
dc.subject.lccLD5655.V855 1995.Y366en
dc.titleMultiuser detection for CDMA systems with convolutional codingen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineElectrical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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