Inter-relay cooperation

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dc.contributor.author Abou-Rjeily, Chadi
dc.contributor.author Haddad, Serj
dc.date.accessioned 2016-02-15T07:42:44Z
dc.date.available 2016-02-15T07:42:44Z
dc.date.issued 2016-02-15
dc.identifier.issn 0090-6778 en_US
dc.identifier.uri http://hdl.handle.net/10725/3068
dc.description.abstract In this paper, we study the effect of the presence of inter-relay connections on the performance of cooperative free-space optical (FSO) networks. Unlike the existing literature where conventional cooperation in FSO systems is realized in two steps through source-relay (S-R) followed by relay-destination (R-D) communications, we propose and analyze a novel three-stage cooperation methodology. The proposed scheme is based on exploiting the potential presence of FSO links between neighboring relays for the sake of complementing the S-R and R-D steps with an intermediate inter-relay communication step that serves in enhancing the fidelity of signal reconstruction at the relays before retransmitting to the destination. For the proposed scheme, we derive closed-form expressions for the conditional error probability with any number of relays. We also propose a closed-form power allocation strategy (PAS) in the case where the background noise is negligible. This PAS is based on minimizing an asymptotic upper-bound on the conditional error probability by applying the method of Lagrange multipliers with the solution satisfying the Karush-Kuhn-Tucker (KKT) conditions. Results show that the presence of inter-relay connections, associated with an appropriate cooperation scheme and PAS, can significantly boost the performance of relay-assisted FSO systems. en_US
dc.language.iso en en_US
dc.title Inter-relay cooperation en_US
dc.type Article en_US
dc.description.version Published en_US
dc.title.subtitle a new paradigm for enhanced relay-assisted FSO communications en_US
dc.author.school SOE en_US
dc.author.idnumber 200701131 en_US
dc.author.woa N/A en_US
dc.author.department Electrical Engineering en_US
dc.description.embargo N/A en_US
dc.relation.journal IEEE Transactions on Communications en_US
dc.journal.volume 62 en_US
dc.journal.issue 6 en_US
dc.article.pages 1970-1982 en_US
dc.identifier.doi http://dx.doi.org/10.1109/TCOMM.2014.2316262 en_US
dc.identifier.ctation Abou-Rjeily, C., & Haddad, S. (2014). Inter-relay cooperation: A new paradigm for enhanced relay-assisted FSO communications. IEEE Transactions on Communications, 62(6), 1970-1982. en_US
dc.author.email chadi.abourjeily@lau.edu.lb
dc.identifier.url http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6355001
dc.orcid.id https://orcid.org/0000-0003-2255-1842

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