Clean relaying in cognitive radio networks with variational distance secrecy constraint
2014 (English)In: 2014 IEEE Globecom Workshops, GC Wkshps 2014, 2014, 1337-1342 p.Conference paper (Refereed)
In this paper we investigate the cooperative secure communication in a four-node cognitive channel where the secondary receiver is treated as a potential eavesdropper with respect to the primary transmission with variational distance constraint. And the primary user's secrecy rate is required to be unchanged. We propose the clean relaying with the cooperative jamming scheme to achieve this goal, where the secondary transmitter splits its transmitting phase into two non-overlapped intervals after successfully decoding the primary message. Due to the considered secrecy metric, we resort to the information spectrum method, to derive the achievable secrecy rates for the primary user. Then we formulate the secondary user's rate maximization problem over the power allocation and time splitting at the cognitive transmitter under the constraint that primary user's secrecy rate is unchanged. Numerical results show that the secondary transmitter can choose clean relaying or pure cooperative jamming according to the relative positions of the nodes to achieve better performance than the one without any clean phase.
Place, publisher, year, edition, pages
2014. 1337-1342 p.
Cooperative communication, Jamming, Transmitters, Achievable secrecy rates, Cognitive radio network, Cooperative jamming, Information spectrum, Maximization problem, Overlapped intervals, Primary transmission, Variational distance, Cognitive radio
IdentifiersURN: urn:nbn:se:kth:diva-167036DOI: 10.1109/GLOCOMW.2014.7063619ScopusID: 2-s2.0-84946691739ISBN: 9781479974702OAI: oai:DiVA.org:kth-167036DiVA: diva2:813188
2014 IEEE Globecom Workshops, GC Wkshps 2014, 8 December 2014 through 12 December 2014
QC 201505212015-05-212015-05-212015-11-17Bibliographically approved