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dc.contributor.authorSoleymani, Mohammad
dc.contributor.authorLameiro Gutiérrez, Christian 
dc.contributor.authorSchreier, Peter J.
dc.contributor.authorSantamaría Caballero, Luis Ignacio 
dc.contributor.otherUniversidad de Cantabriaes_ES
dc.date.accessioned2018-12-18T16:44:06Z
dc.date.available2018-12-18T16:44:06Z
dc.date.issued2018
dc.identifier.isbn978-1-5386-1572-0
dc.identifier.isbn978-1-5386-1571-3
dc.identifier.otherTEC2016-75067-C4-4-Res_ES
dc.identifier.urihttp://hdl.handle.net/10902/15188
dc.description.abstractImproper signaling, where real and imaginary parts of the transmit signal are correlated and/or have unequal power, has received a lot of attention lately because it has been shown to increase achievable rates in many interference-limited communication systems. In this paper, we study whether improper signaling can also benefit an orthogonal frequency-division multiplexing (OFDM) underlay cognitive radio (UCR) system. We assume that the primary user (PU) transmits proper signals, while the secondary user (SU) is allowed to employ improper signaling. We consider two different rate constraints for the rate of the PU: i) the total rate of the PU, and ii) the rate of the PU in each subband. We propose an algorithm to implement improper signaling for each constraint. In both cases, we show that the benefits of improper signaling are relatively small and decrease rapidly with increasing number of subbands. This rather negative result shows that the use of improper signaling in interference scenarios needs to be justified on a case-by-case basis.es_ES
dc.description.sponsorshipThe work of M. Soleymani, C. Lameiro and P. J. Schreier was supported by the German Research Foundation (DFG) under grants LA 4107/1-1 and SCHR 1384/8-1. The work of I. SantamarÍa has been partially supported by MINECO of Spain and AEI/FEDER funds of the E.U., under grant TEC2016-75067-C4-4-R (CARMEN).es_ES
dc.format.extent5 p.es_ES
dc.language.isoenges_ES
dc.publisherIEEEes_ES
dc.rights© 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.es_ES
dc.sourceIEEE Statistical Signal Processing Workshop (SSP), Freiburg, Germany, 2018, 722-726es_ES
dc.subject.otherImproper signalinges_ES
dc.subject.otherUnderlay cognitive radioes_ES
dc.subject.otherOFDM systemses_ES
dc.subject.otherInterference channelses_ES
dc.titleImproper signaling for OFDM underlay cognitive radio systemses_ES
dc.typeinfo:eu-repo/semantics/conferenceObjectes_ES
dc.relation.publisherVersionhttps://doi.org/10.1109/SSP.2018.8450843es_ES
dc.rights.accessRightsopenAccesses_ES
dc.identifier.DOI10.1109/SSP.2018.8450843
dc.type.versionacceptedVersiones_ES


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