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dc.contributor.authorSayed, Mostafa M.
dc.contributor.authorAbdallah, Mohamed M.
dc.contributor.authorQaraqe, Khalid A.
dc.contributor.authorAlouini, Mohamed-Slim
dc.date.accessioned2015-08-04T07:16:40Z
dc.date.available2015-08-04T07:16:40Z
dc.date.issued2013-10
dc.identifier.issn15361276
dc.identifier.doi10.1109/TWC.2013.091113.120882
dc.identifier.urihttp://hdl.handle.net/10754/564807
dc.description.abstractIn spectrum sharing systems, a secondary user (SU) is allowed to share the spectrum with a primary (licensed) network under the condition that the interference observed at the receivers of the primary users (PU-Rxs) is below a predetermined level. In this paper, we consider a secondary network comprised of a secondary transmitter (SU-Tx) equipped with multiple antennas and a single-antenna secondary receiver (SU-Rx) sharing the same spectrum with multiple primary users (PUs), each with a distinct spectrum. We develop transmit antenna diversity schemes at the SU-Tx that exploit the multi-spectrum diversity provided by the existence of multiple PUs so as to optimize the signal-to-noise ratio (SNR) at the SU-Rx. In particular, assuming bounded transmit power at the SU-Tx, we develop switched selection schemes that select the primary spectrum and the SU-Tx transmit antenna that maintain the SNR at the SU-Rx above a specific threshold. Assuming Rayleigh fading channels and binary phase-shift keying (BPSK) transmission, we derive the average bit-error-rate (BER) and average feedback load expressions for the proposed schemes. For the sake of comparison, we also derive a BER expression for the optimal selection scheme that selects the best antenna/spectrum pair that maximizes the SNR at the SU-Rx, in exchange of high feedback load and switching complexity. Finally, we show that our analytical results are in perfect agreement with the simulation results. © 2013 IEEE.
dc.description.sponsorshipThis publication was made possible by NPRP grant numbers NPRP 5-250-2-087 from the Qatar National Research Fund (a member of Qatar Foundation). The statements made herein are solely the responsibility of the authors.
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)
dc.subjectspectrum sharing
dc.subjectTransmit selection diversity
dc.subjecttransmit switched diversity
dc.titleJoint switched multi-spectrum and transmit antenna diversity for spectrum sharing 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.journalIEEE Transactions on Wireless Communications
dc.contributor.institutionVarkon Semiconductors, Maadi, Cairo 11434, Egypt
dc.contributor.institutionDepartment of Electrical and Computer Engineering, Texas A and M University, PO Box 23874, Education City, Doha, Qatar
dc.contributor.institutionDepartment of Electronics and Communications Engineering, Cairo University, PO Box 12613, Giza, Egypt
kaust.personAlouini, Mohamed-Slim


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