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Frequency- domain multiuser detection for highly overloaded DS-CDMA systems

dc.contributor.authorSilva, Paulo
dc.contributor.authorDinis, Rui
dc.date.accessioned2013-02-08T16:50:57Z
dc.date.available2013-02-08T16:50:57Z
dc.date.issued2011-09
dc.description.abstractA DS-CDMA (Direct Sequence-Coded Division Multiple Access) system has maximum spectral efficiency if the system is fully loaded (i.e., the number of users is equal to the spreading factor) and we employ signals with bandwidth equal to the chip rate. However, due to implementation constraints we need to employ signals with higher bandwidth, decreasing the system’s spectral efficiency. In this paper we consider prefixassisted DS-CDMA systems with bandwidth that can be significantly above the chip rate. To allow high spectral efficiency we consider highly overloaded systems where the number of users can be twice the spreading factor or even more. To cope with the strong interference levels we present an iterative frequencydomain receiver that takes full advantage of the total bandwidth of the transmitted signals. Our performance results show that the proposed receiver can have excellent performance, even for highly overloaded systems. Moreover, the overall system performance can be close to the maximum theoretical spectral efficiency, even with transmitted signals that have bandwidth significantly above the chip rate.por
dc.identifier.isbn978-1-4244-8328-0
dc.identifier.issn1090-3038
dc.identifier.otherAUT: PSI00617;
dc.identifier.urihttp://hdl.handle.net/10400.1/2272
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherIEEEpor
dc.relation.publisherversionhttp://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6093049por
dc.subjectNetworking and broadcastingpor
dc.subjectCommunicationpor
dc.subjectDevices and systemspor
dc.subjectComponentspor
dc.subjectCircuitspor
dc.subjectComputing and processing (Hardware/ software)por
dc.titleFrequency- domain multiuser detection for highly overloaded DS-CDMA systemspor
dc.typeconference object
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FEEA-TEL%2F099074%2F2008/PT
oaire.citation.conferencePlaceSan Francisco, CApor
oaire.citation.titleVehicular Technology Conference (VTC Fall), 2011 IEEEpor
oaire.fundingStream3599-PPCDT
person.familyNameSilva
person.givenNamePaulo
person.identifier.ciencia-id2219-9E5D-9CD6
person.identifier.orcid0000-0002-3599-5103
person.identifier.scopus-author-id24829622000
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspor
rcaap.typeconferenceObjectpor
relation.isAuthorOfPublication9abbef80-3f9e-464d-ad7b-413afab8899f
relation.isAuthorOfPublication.latestForDiscovery9abbef80-3f9e-464d-ad7b-413afab8899f
relation.isProjectOfPublicationfc003785-33ee-4788-917c-e1c186841ded
relation.isProjectOfPublication.latestForDiscoveryfc003785-33ee-4788-917c-e1c186841ded

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