Department of Telecommunications, VSB-Technical University of Ostrava, 17. listopadu 2172/15, 708 00 Ostrava, Czech Republic.
Department of Computer Networks and Data Communications, Eastern International University (EIU), Nam Ky Khoi Nghia, 75000 Binh Duong, Vietnam.
Sensors (Basel). 2020 Feb 7;20(3):895. doi: 10.3390/s20030895.
Security performance and the impact of imperfect channel state information (CSI) in underlay cooperative cognitive networks (UCCN) is investigated in this paper. In the proposed scheme, relay R uses non-orthogonal multiple access (NOMA) technology to transfer messages e 1 , e 2 from the source node S to User 1 (U 1 ) and User 2 (U 2 ), respectively. An eavesdropper (E) is also proposed to wiretap the messages of U 1 and U 2 . The transmission's security performance in the proposed system was analyzed and performed over Rayleigh fading channels. Through numerical analysis, the results showed that the proposed system's secrecy performance became more efficient when the eavesdropper node E was farther away from the source node S and the intermediate cooperative relay R. The secrecy performance of U 1 was also compared to the secrecy performance of U 2 . Finally, the simulation results matched the Monte Carlo simulations well.
本文研究了在非正交多址接入（NOMA）技术下，利用中继 R 实现的信息在物理层传输时，非理想信道状态信息（CSI）对认知网络中信息安全性能的影响。在提出的方案中，中继 R 采用非正交多址接入（NOMA）技术分别将消息 e1、e2 从源节点 S 传输到用户 1（U1）和用户 2（U2）。此外，还引入了一个窃听者（E）来窃听 U1 和 U2 的消息。通过对瑞利衰落信道的数值分析，对所提出的系统的传输安全性性能进行了分析。结果表明，当窃听者节点 E 距离源节点 S 和中间协作中继 R 越远时，该系统的安全性能越高效。同时，还比较了 U1 和 U2 的安全性能。最后，仿真结果与蒙特卡罗仿真吻合良好。
