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dc.contributor.authorSboui, Lokman
dc.contributor.authorGhazzai, Hakim
dc.contributor.authorRezki, Zouheir
dc.contributor.authorAlouini, Mohamed-Slim
dc.date.accessioned2015-05-10T14:33:42Z
dc.date.available2015-05-10T14:33:42Z
dc.date.issued2015-04-28
dc.identifier.citationAchievable Rate of Spectrum Sharing Cognitive Radio Multiple-Antenna Channels 2015:1 IEEE Transactions on Wireless Communications
dc.identifier.issn1536-1276
dc.identifier.doi10.1109/TWC.2015.2427281
dc.identifier.urihttp://hdl.handle.net/10754/552534
dc.description.abstractWe investigate the spectral efficiency gain of an uplink Cognitive Radio (CR) Multi-Input-Multi-Output system in which the Secondary User (SU) is allowed to share the spectrum with the Primary User (PU) using a specific precoding scheme to communicate with a common receiver. The proposed scheme exploits, at the same time, the free eigenmodes of the primary channel after a space alignment procedure and the interference threshold tolerated by the PU. At the common receiver, we adopt a Successive Interference Cancellation (SIC) technique to eliminate the effect of the detected primary signal transmitted through the exploited eigenmodes. Furthermore, we analyze the SIC operation inaccuracy as well as the CSI estimation imperfection on the PU and SU throughputs. Numerical results show that our proposed scheme enhances considerably the cognitive achievable rate. For instance, in case of a perfect detection of the PU signal, the CR rate remains non-zero for high Signal to Noise Ratio which is usually impossible when we only employ a space alignment technique. We show that a modified water-filling power allocation policy at the PU can increase the secondary rate with a marginal degradation of the primary rate. Finally, we investigate the behavior of the PU and SU rates through the study of the rate achievable region.
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)
dc.relation.urlhttp://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=7097091
dc.rights(c) 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, 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 components of this work in other works.
dc.subjectAchievable rate
dc.subjectrate region
dc.subjectspace alignment
dc.subjectspectrum sharing
dc.subjectsuccessive interference cancellation
dc.subjectunderlay cognitive radio
dc.titleAchievable Rate of Spectrum Sharing Cognitive Radio Multiple-Antenna Channels
dc.typeArticle
dc.contributor.departmentCommunication Theory Lab
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.contributor.departmentElectrical Engineering Program
dc.identifier.journalIEEE Transactions on Wireless Communications
dc.eprint.versionPost-print
kaust.personSboui, Lokman
kaust.personGhazzai, Hakim
kaust.personRezki, Zouheir
kaust.personAlouini, Mohamed-Slim
refterms.dateFOA2018-06-14T06:12:37Z
dc.date.published-online2015-04-28
dc.date.published-print2015-09


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