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Efficient complex sphere decoding for MC-CDMA systems

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dc.affiliation.dptoUC3M. Departamento de Teoría de la Señal y Comunicacioneses
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Tratamiento de la Señal y Aprendizaje (GTSA)es
dc.contributor.authorSantiago-Mozos, Ricardo
dc.contributor.authorFernández-Getino García, María Julia
dc.date.accessioned2011-08-04T12:05:35Z
dc.date.available2011-08-04T12:05:35Z
dc.date.issued2006-11
dc.description.abstractMaximum likelihood (ML) joint detection of multi-carrier code division multiple access (MC-CDMA) systems can be efficiently implemented with a sphere decoding (SD) algorithm. In this paper, we examine the application of complex instead of real SD to detect MC-CDMA, which solves many problems in a more elegant manner and extends SD adaptability to any constellation. We first propose a new complex SD algorithm whose efficiency is based on not requiring an estimate of the initial search radius but selecting the Babai point as the initial sphere radius instead; also, efficient strategies regarding sorting the list of possible lattice points are applied. Indeed, complex SD allows complex matrix operations which are faster than real counterparts in double dimension. Next, a novel lattice representation for the MC-CDMA system is introduced, which allows optimum multiuser detection directly from the received signal. This avoids noise whitening operation, and also despreading and equalization procedures are not required further at the receiver side
dc.description.sponsorshipThis work has been partly funded by the Spanish government with national project MACAWI (TEC 2005-07477-c02-02) and project MAMBO (UC3M-TEC-05-027)
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dc.format.mimetypeapplication/pdf
dc.identifier.bibliographicCitationSantiago-Mozos, R.; Fernandez-Getino-Garcia, M.J., "Efficient complex sphere decoding for MC-CDMA systems," IEEE Transactions on Wireless Communications. 2006, vol.5, no.11, pp.2992-2996en
dc.identifier.doi10.1109/TWC.2006.04582
dc.identifier.issn1536-1276
dc.identifier.publicationfirstpage2992
dc.identifier.publicationissue11
dc.identifier.publicationlastpage2996
dc.identifier.publicationtitleIEEE Transactions on Wireless Communications
dc.identifier.publicationvolume5
dc.identifier.urihttps://hdl.handle.net/10016/11972
dc.language.isoeng
dc.publisherIEEE
dc.relation.publisherversionhttp://dx.doi.org/10.1109/TWC.2006.04582
dc.rights© IEEE
dc.rights.accessRightsopen access
dc.subject.ecienciaTelecomunicaciones
dc.subject.otherMulti carrier code division multiple access
dc.subject.otherMaximum likelihood decoding
dc.subject.otherSphere decoding
dc.subject.otherMultiuser detection
dc.titleEfficient complex sphere decoding for MC-CDMA systems
dc.typeresearch article*
dc.type.hasVersionAM*
dspace.entity.typePublication
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