Artificial noise-aided secure communication in a bidirectional relaying network

被引：5
|
作者：
Li, An [1 ]
Xu, Yizhu [1 ]
Wang, Yuhao [1 ]
Sun, Lihua [1 ]
机构：
[1] Nanchang Univ, Dept Elect Informat Engn, Nanchang 330031, Jiangxi, Peoples R China
来源：
INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS | 2018年 / 31卷 / 03期
关键词：
artificial noise; amplify-and-forward; bidirectional relaying; physical layer security; power allocation; PHYSICAL-LAYER SECURITY; COOPERATIVE NETWORKS; SECRECY; SELECTION; CHANNEL;
D O I：
10.1002/dac.3464
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
An artificial noise strategy is proposed for amplify-and-forward bi-directional relay network where the eavesdropper can wiretap the relay channels in both hops. Artificial noise is used to confuse the eavesdropper and improve its secrecy. Specifically, the source and the relay are allowed to split their available transmit power into 2 parts: a useful information portion and a jamming portion to transmit a jamming signal. The mathematical model is established for 2-way relay network with an eavesdropper. The secrecy rate achieved by using artificial jamming is derived from the above model. The optimal power allocation with individual power constraint is obtained via sequential quadratic programming to maximize the secrecy sum rate, and 2 special cases are investigated. Furthermore, the benchmark is provided for the purpose of performance comparison. Simulation results show that the proposed strategy can significantly improve the secrecy sum rate by using artificial noise to jam the eavesdropper.
引用
收藏
页数：11
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