Secrecy Outage of Cooperative Relay Network With and Without Eavesdropper’s Direct Link

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https://ieeexplore.ieee.org/document/8077065

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10.1109/NCC.2017.8077065
 http://hdl.handle.net/11603/11605

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UMBC Computer Science and Electrical Engineering Department
UMBC Faculty Collection

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2017-10-23

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conference paper pre-print
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Citation of Original Publication

Khyati 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.2017.8077065

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© 2017 IEEE

Subjects

Diversity reception
Signal to noise ratio
amplify and forward communication
Fading channels
Power system reliability
telecommunication security
optimal relay selection scheme
eavesdropper transmission link
perfect decoding
Rayleigh channels
UMBC Ebiquity Research Group
selection combining diversity
outage performance

Abstract

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 relays