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dc.contributor.authorZorgui, Marwen
dc.contributor.authorRezki, Zouheir
dc.contributor.authorAlomair, Basel
dc.contributor.authorJorswieck, Eduard A.
dc.contributor.authorAlouini, Mohamed-Slim
dc.date.accessioned2016-02-01T13:51:03Z
dc.date.available2016-02-01T13:51:03Z
dc.date.issued2015-09-28
dc.identifier.doi10.1109/CNS.2015.7346902
dc.identifier.urihttp://hdl.handle.net/10754/595374
dc.description.abstractWe consider secret-key agreement with public discussion over Rayleigh fast-fading channels with transmit, receive and eavesdropper correlation. The legitimate receiver along with the eavesdropper are assumed to have perfect channel knowledge while the transmitter has only knowledge of the correlation matrices. We analyze the secret-key capacity in the low signal-to-noise ratio (SNR) regime. We derive closed-form expressions for the first and the second derivatives of the secret-key capacity with respect to SNR at SNR= 0, for arbitrary correlation matrices and number of transmit, receive and eavesdropper antennas. Moreover, we identify optimal transmission strategies achieving these derivatives. For instance, we prove that achieving the first and the second derivatives requires a uniform power distribution between the eigenvectors spanning the maximal-eigenvalue eigenspace of the transmit correlation matrix. We also compare the optimal transmission scheme to a simple uniform power allocation. Finally, we express the minimum energy required for sharing a secret-key bit as well as the wideband slope in terms of the system parameters.
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)
dc.relation.urlhttp://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=7346902
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.subjectMIMO systems
dc.subjectSecret-key agreement
dc.subjectbeamforming
dc.subjectcorrelation
dc.subjectenergy efficiency
dc.subjectlow-SNR regime
dc.titleSecret-key agreement over spatially correlated multiple-antenna channels in the low-SNR regime
dc.typeConference Paper
dc.contributor.departmentElectrical Engineering Program
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.identifier.journal2015 IEEE Conference on Communications and Network Security (CNS)
dc.conference.date28-30 Sept. 2015
dc.conference.name2015 IEEE Conference on Communications and Network Security (CNS)
dc.conference.locationFlorence
dc.eprint.versionPost-print
dc.contributor.institutionThe National Center for Cybersecurity Technology (C4C) King Abdulaziz City for Science and Technology, Riyadh, Saudi Arabia
dc.contributor.institutionTechnische Universit¨at Dresden, Germany
kaust.personZorgui, Marwen
kaust.personRezki, Zouheir
kaust.personAlouini, Mohamed-Slim
refterms.dateFOA2018-06-13T13:56:44Z


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