Zaghdoud, NesrineMnaouer, Adel BenBoujemaa, HatemTouati, Farid2020-09-212020-09-21© 20202020-06Zaghdoud, N., Mnaouer, A. B., Boujemaa, H., & Touati, F. (2020, June). Secrecy Performance Analysis of Cooperative NOMA system with multiple DF Relays. In 2020 International Wireless Communications and Mobile Computing (IWCMC) (pp. 2160-2163). IEEE. https://doi.org/10.1109/IWCMC48107.2020.9148086978-172813129-0https://doi.org/10.1109/IWCMC48107.2020.9148086http://hdl.handle.net/20.500.12519/240This conference paper is not available at CUD collection. The version of scholarly record of this conference paper is published in 2020 International Wireless Communications and Mobile Computing (IWCMC) (2020), available online at: https://doi.org/10.1109/IWCMC48107.2020.9148086In this paper, we derive the Secrecy Outage Probability (SOP) and Strictly Positive Secrecy Capacity (SPSC) of cooperative Non Orthogonal Multiple Access (NOMA) in the presence of K Decode and Forward (DF) relays and Rayleigh fading channels. We also optimize the powers allocated to far and near users to maximize the SPSC or minimize the SOP. Our results are valid for any number of relays with arbitrary positions. © 2020 IEEE.enPermission to reuse abstract has been secured from Institute of Electrical and Electronics Engineers Inc.cooperative NOMADecode and ForwardMultiple relaysecrecy outage probablitystrictly positive secrecy capacityFading channelsMobile computingArbitrary positionsDf relaysMultiple accessNon-orthogonalPerformance analysisSecrecy outage probabilitiesRayleigh fadingConference PaperCopyright : © 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.