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dc.contributor.authorElkhalil, Khalil
dc.contributor.authorEltayeb, Mohammed E.
dc.contributor.authorDahrouj, Hayssam
dc.contributor.authorAl-Naffouri, Tareq Y.
dc.date.accessioned2016-02-16T14:03:13Z
dc.date.available2016-02-16T14:03:13Z
dc.date.issued2016-01-28
dc.identifier.doi10.1109/VTCFall.2015.7390898
dc.identifier.urihttp://hdl.handle.net/10754/596341
dc.description.abstractWe propose a distributed user selection strategy in a network MIMO setting with M base stations serving K users. Each base station is equipped with L antennas, where LM ≪ K. The conventional selection strategy is based on a well known technique called semi-orthogonal user selection when the zero-forcing beamforming (ZFBF) is adopted. Such technique, however, requires perfect channel state information at the transmitter (CSIT), which might not be available or need large feedback overhead. This paper proposes an alternative distributed user selection technique where each user sets a timer that is inversely proportional to his channel quality indicator (CQI), as a means to reduce the feedback overhead. The proposed strategy allows only the user with the highest CQI to respond with a feedback. Such technique, however, remains collision free only if the transmission time is shorter than the difference between the strongest user timer and the second strongest user timer. To overcome the situation of longer transmission times, the paper proposes another feedback strategy that is based on the theory of compressive sensing, where collision is allowed and all users encode their feedback information and send it back to the base-stations simultaneously. The paper shows that the problem can be formulated as a block sparse recovery problem which is agnostic on the transmission time, which makes it a good alternative to the timer approach when collision is dominant.
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)
dc.relation.urlhttp://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=7390898
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.titleDistributed User Selection in Network MIMO Systems with Limited Feedback
dc.typeConference Paper
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.contributor.departmentElectrical Engineering Program
dc.identifier.journal2015 IEEE 82nd Vehicular Technology Conference (VTC2015-Fall)
dc.conference.date6-9 Sept. 2015
dc.conference.name2015 IEEE 82nd Vehicular Technology Conference (VTC Fall)
dc.conference.locationBoston, MA
dc.eprint.versionPost-print
dc.contributor.institutionDepartment of Electrical and Computer Engineering, The University of Texas at Austin, Texas, USA
dc.contributor.institutionDepartment of Electrical and Computer Engineering, Effat University, Jeddah, KSA
kaust.personElkhalil, Khalil
kaust.personAl-Naffouri, Tareq Y.
refterms.dateFOA2018-06-14T02:27:43Z
dc.date.published-online2016-01-28
dc.date.published-print2015-09


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