Optimal signaling for secure communications over Gaussian MIMO wiretap channels
dc.contributor.author | Loyka, S. | en |
dc.contributor.author | Charalambous, Charalambos D. | en |
dc.creator | Loyka, S. | en |
dc.creator | Charalambous, Charalambos D. | en |
dc.date.accessioned | 2019-04-08T07:47:02Z | |
dc.date.available | 2019-04-08T07:47:02Z | |
dc.date.issued | 2016 | |
dc.identifier.uri | http://gnosis.library.ucy.ac.cy/handle/7/44129 | |
dc.description.abstract | Optimal signaling over the Gaussian multiple-input multiple-output wire-tap channel is studied under the total transmit power constraint. A closed-form solution for an optimal transmit covariance matrix is obtained when the channel is strictly degraded. In combination with the rank-1 solution, this provides the complete characterization of the optimal covariance for the case of two transmit antennas. The cases of weak eavesdropper and high SNR are considered. It is shown that the optimal covariance does not converge to a scaled identity in the high-SNR regime. Necessary optimality conditions and a tight upper bound on the rank of an optimal covariance matrix are established for the general case, along with a lower bound to the secrecy capacity, which is tight in a number of scenarios. © 1963-2012 IEEE. | en |
dc.source | IEEE Transactions on Information Theory | en |
dc.source.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85000444128&doi=10.1109%2fTIT.2016.2618857&partnerID=40&md5=f6cf5e5af3279b17fe08bf8e787905eb | |
dc.subject | Communication channels (information theory) | en |
dc.subject | Covariance matrix | en |
dc.subject | Mimo systems | en |
dc.subject | Trellis codes | en |
dc.subject | Mimo | en |
dc.subject | Signal to noise ratio | en |
dc.subject | Closed form solutions | en |
dc.subject | Mimo wiretap channels | en |
dc.subject | Necessary optimality condition | en |
dc.subject | Optimal signaling | en |
dc.subject | Optimal signalling | en |
dc.subject | Secrecy capacity | en |
dc.subject | Total transmit power | en |
dc.subject | Transmit antenna | en |
dc.subject | Wire-tap channels | en |
dc.subject | Wiretap channel | en |
dc.title | Optimal signaling for secure communications over Gaussian MIMO wiretap channels | en |
dc.type | info:eu-repo/semantics/article | |
dc.identifier.doi | 10.1109/TIT.2016.2618857 | |
dc.description.volume | 62 | |
dc.description.issue | 12 | |
dc.description.startingpage | 7207 | |
dc.description.endingpage | 7215 | |
dc.author.faculty | Πολυτεχνική Σχολή / Faculty of Engineering | |
dc.author.department | Τμήμα Ηλεκτρολόγων Μηχανικών και Μηχανικών Υπολογιστών / Department of Electrical and Computer Engineering | |
dc.type.uhtype | Article | en |
dc.source.abbreviation | IEEE Trans.Inf.Theory | en |
dc.contributor.orcid | Charalambous, Charalambos D. [0000-0002-2168-0231] | |
dc.gnosis.orcid | 0000-0002-2168-0231 |
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