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dc.contributor.authorZhao, Hui
dc.contributor.authorLiu, Zhedong
dc.contributor.authorYang, Liang
dc.contributor.authorAlouini, Mohamed-Slim
dc.date.accessioned2019-07-07T07:32:15Z
dc.date.available2019-07-07T07:32:15Z
dc.date.issued2019-07-07
dc.identifier.citationZhao, H., Liu, Z., Yang, L., & Alouini, M.-S. (2019). Secrecy Analysis in DF Relay Over Generalized-$K$ Fading Channels. IEEE Transactions on Communications, 67(10), 7168–7182. doi:10.1109/tcomm.2019.2926719
dc.identifier.doi10.1109/TCOMM.2019.2926719
dc.identifier.urihttp://hdl.handle.net/10754/655931
dc.description.abstractIn this paper, we analyze the secrecy performance of the decode-and-forward (DF) relay system in generalized-K fading channels. In a typical four-node communications model, a source (S) sends confidential information to a destination (D) via a relay (R) using DF strategy in two time slots, while an eavesdropper (E) wants to overhear the information from S to D over generalized-K fading channels. To be more realistic, we assume that E can receive the signals of two time slots, and there is no direct link between S and D because of heavy fading. Based on those assumptions, we derive closed-form expressions for the secrecy outage probability (SOP) and ergodic secrecy capacity (ESC) by using a tight approximate probability density function of the generalized-K model. Then, asymptotic expressions for the SOP and ESC are also derived in the high signal-to-noise ratio region, not only because we can get some insights about SOP and ESC, but also because expressions for SOP and ESC can be simplified significantly. The single relay system is subsequently extended into a multi-relay system, where the asymptotic SOP analysis of three proposed relay selection strategies is investigated. Further, the security-reliability tradeoff analysis in the multi-relay system is also presented given that S adopts a constant code rate. Finally, the Monte-Carlo simulation is used to demonstrate the accuracy of the derived closed-form expressions.
dc.description.sponsorshipThis work was funded by the office of sponsored research (OSR) at KAUST. The work of H. Zhao was done while he was studying at KAUST.
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)
dc.relation.urlhttps://ieeexplore.ieee.org/document/8755318/
dc.relation.urlhttps://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8755318
dc.rightsArchived with thanks to IEEE Transactions on Communications
dc.subjectDecode-and-forward
dc.subjectergodic secrecy capacity
dc.subjectgeneralized-K fading channel
dc.subjectsecrecy outage probability
dc.subjectsecurity-reliability tradeoff
dc.titleSecrecy Analysis in DF Relay over Generalized-K Fading Channels
dc.typeArticle
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.contributor.departmentElectrical Engineering
dc.contributor.departmentElectrical Engineering Program
dc.contributor.departmentStatistics
dc.contributor.departmentStatistics Program
dc.identifier.journalIEEE Transactions on Communications
dc.eprint.versionPost-print
dc.contributor.institutionCommunication Systems Department, EURECOM, Sophia Antipolis 06410, France.
dc.contributor.institutionCollege of Computer Science and Electronic Engineering, Hunan University, Changsha 410082, China.
kaust.personZhao, Hui
kaust.personLiu, Zhedong
kaust.personAlouini, Mohamed-Slim
refterms.dateFOA2019-07-07T07:34:27Z
dc.date.published-online2019-07-07
dc.date.published-print2019


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