Joshi, AnupamChopra, KhyatiBose, Ranjan2018-10-192018-10-192017-10-23Khyati Chopra, Ranjan Bose, Anupam Joshi, Secrecy Outage of Cooperative Relay Network With and Without Eavesdropper’s Direct Link, Twenty-third National Conference on Communications (NCC) ,2017, DOI: 10.1109/NCC.2017.807706510.1109/NCC.2017.8077065http://hdl.handle.net/11603/116052017 Twenty-third National Conference on Communications (NCC)In this paper, a source communicates to the destination with the cooperation of a relay, in the presence of an eavesdropper. All the links undergo Rayleigh fading and perfect decoding at the relays is not considered. The secrecy outage probability expression is evaluated for a decode-and-forward (DF) dual-hop cooperative relay network, both with and without the presence of direct source to eavesdropper transmission link. The performance of the maximal ratio combining (MRC) and selection combining (SC) diversity at the eavesdropper is investigated. Asymptotic and diversity gain analysis for both the single relay and multi-relay system is obtained, when average SNRs of source-relay and relay-destination links are balanced or unbalanced. We have shown that the increase in target secrecy rate and eavesdropper channel quality significantly affects the outage performance of the system. We have investigated the outage probability of optimal relay selection scheme, when either full instantaneous channel state information (ICSI) or statistical channel state information (SCSI) of all the links is available and have shown that there is improvement in the secrecy performance with the increase in the number of relays6 pagesen-USThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.© 2017 IEEEDiversity receptionSignal to noise ratioamplify and forward communicationFading channelsPower system reliabilitytelecommunication securityoptimal relay selection schemeeavesdropper transmission linkperfect decodingRayleigh channelsUMBC Ebiquity Research Groupselection combining diversityoutage performanceText