Research Repository

Secrecy Outage Probability of Energy-Harvesting Cooperative NOMA Transmissions with Relay Selection

Salem, Abdlehamid and Musavian, Leila and Jorswieck, Eduard and Aissa, Sonia (2020) 'Secrecy Outage Probability of Energy-Harvesting Cooperative NOMA Transmissions with Relay Selection.' IEEE Transactions on Green Communications and Networking, 4 (4). pp. 1130-1148. ISSN 2473-2400 (In Press)

J_Two_Col.pdf - Accepted Version

Download (343kB) | Preview


Three relay selection techniques, aiming at achieving secure non-orthogonal multiple access in cooperative energy-harvesting (EH) communications, are proposed and compared. In the cooperative relaying system, the source node communicates with multiple users through amplify-and- forward EH relays in the presence of a passive eavesdropper. The relay selection is a two-stage strategy, where the first stage aims at achieving the users’ target data rate, and the second aims at optimizing the secrecy outage probability. New explicit analytical expressions for the secrecy outage probability are derived for three operating scenarios: i) when the channel state information (CSI) of the eavesdropper is unknown, and a two-stage conventional relay selection scheme is considered, ii) when CSI of the eavesdropper is known, and a two- stage optimal relay selection scheme is used, and iii) when multiple relays participate in forwarding the signal to the end users. Monte-Carlo simulations are provided to confirm the derivations, and the effects of the main system parameters on its secrecy are investigated. In particular, it is shown that the optimal relay selection scheme outperforms the conventional and the multiple-relays schemes in terms of secrecy outage probability, and that this superiority becomes more obvious when the number of the relays increases.

Item Type: Article
Uncontrolled Keywords: NOMA; cooperative communications; energy harvesting; secrecy outage probability; physical-layer security
Divisions: Faculty of Science and Health
Faculty of Science and Health > Computer Science and Electronic Engineering, School of
SWORD Depositor: Elements
Depositing User: Elements
Date Deposited: 05 Jun 2020 20:32
Last Modified: 23 Sep 2022 19:40

Actions (login required)

View Item View Item