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dc.contributor.authorSboui, Lokman
dc.contributor.authorGhazzai, Hakim
dc.contributor.authorRezki, Zouheir
dc.contributor.authorAlouini, Mohamed-Slim
dc.date.accessioned2015-08-24T08:36:41Z
dc.date.available2015-08-24T08:36:41Z
dc.date.issued2015-03
dc.identifier.issn10897798
dc.identifier.doi10.1109/LCOMM.2014.2387843
dc.identifier.urihttp://hdl.handle.net/10754/575727
dc.description.abstractWe study the secondary sum-rate of an underlay cognitive multiple access channel consisting of a primary user and multiple secondary users (SUs) communicating with a common destination. We propose a particular linear precoding and SU selection scheme that maximize the cognitive sum-rate. This scheme is based on space alignment strategy allowing SUs to share the spectrum without interfering with each other. We derive the optimal power allocation for each selected SU after applying perfect or imperfect successive interference cancellation. Numerical results show that the proposed scheme provides a significant sum-rate improvement as the number of SUs increases. In addition, it achieves almost the same performance as an exhaustive search selection, mainly in low and high power ranges. © 1997-2012 IEEE.
dc.description.sponsorshipManuscript received July 28, 2014; revised December 24, 2014; accepted December 27, 2014. Date of publication January 6, 2015; date of current version March 6, 2015. This work was supported by the Qatar National Research Fund (a member of Qatar Foundation) under NPRP Grant NPRP 5-250-2-087. The statements made herein are solely the responsibility of the authors. The associate editor coordinating the review of this paper and approving it for publication was T. Q. Duong.
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)
dc.subjectAchievable rate
dc.subjectmultiple secondary users
dc.subjectspace alignment
dc.subjectunderlay cognitive radio
dc.titleAchievable Rate of a Cognitive MIMO Multiple Access Channel With Multi-Secondary Users
dc.typeArticle
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.contributor.departmentElectrical Engineering Program
dc.contributor.departmentCommunication Theory Lab
dc.identifier.journalIEEE Communications Letters
kaust.personSboui, Lokman
kaust.personGhazzai, Hakim
kaust.personRezki, Zouheir
kaust.personAlouini, Mohamed-Slim


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