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dc.contributor.authorYang, Liang
dc.contributor.authorQaraqe, Khalid A.
dc.contributor.authorSerpedin, Erchin
dc.contributor.authorAlouini, Mohamed-Slim
dc.date.accessioned2015-08-03T12:19:03Z
dc.date.available2015-08-03T12:19:03Z
dc.date.issued2014-12
dc.identifier.issn18744907
dc.identifier.doi10.1016/j.phycom.2014.09.003
dc.identifier.urihttp://hdl.handle.net/10754/563905
dc.description.abstractThis paper considers a spectrum sharing (SS) multiple-input multiple-output (MIMO) system operating in a Rayleigh fading environment. First the capacity of a single-user SS spatial multiplexing system is investigated in two scenarios that assume different receivers. To explicitly show the capacity scaling law of SS MIMO systems, some approximate capacity expressions for the two scenarios are derived. Next, we extend our analysis to a multiple user system with zero-forcing receivers (ZF) under spatially-independent scheduling and analyze the sum-rate. Furthermore, we provide an asymptotic sum-rate analysis to investigate the effects of different parameters on the multiuser diversity gain. Our results show that the secondary system with a smaller number of transmit antennas Nt and a larger number of receive antennas Nr can achieve higher capacity at lower interference temperature Q, but at high Q the capacity follows the scaling law of the conventional MIMO systems. However, for a ZF SS spatial multiplexing system, the secondary system with small Nt and large Nr can achieve the highest capacity throughout the entire region of Q. For a ZF SS spatial multiplexing system with scheduling, the asymptotic sum-rate scales like Ntlog2(Q(KNtNp-1)/Nt), where Np denotes the number of antennas of the primary receiver and K represents the number of secondary transmitters.
dc.publisherElsevier BV
dc.subjectMIMO
dc.subjectMultiuser diversity
dc.subjectSpectrum sharing
dc.subjectZero-forcing
dc.titleCapacity analysis of spectrum sharing spatial multiplexing MIMO systems
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.journalPhysical Communication
dc.contributor.institutionSchool of Information Engineering, Guangdong University of TechnologyGuangzhou, China
dc.contributor.institutionNational Mobile Communications Research Laboratory, Southeast University, China
dc.contributor.institutionDepartment of ECE, Texas A and M University at QatarDoha, Qatar
dc.contributor.institutionDepartment of ECE, Texas A and M UniversityCollege Station, TX, United States
kaust.personAlouini, Mohamed-Slim


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