Cooperative Jamming for Physical Layer Security in Hybrid Satellite Terrestrial Relay Networks

查看全文 作　　者：Su [1]Yan;Xinyi [1]Wang;Zongling [3]Li;Bin [2]Li;Zesong [1]Fei

机构地区：[1]School of Information and Electronics,Beijing Institute of Technology,Beijing 100081,China;[2]School of Computer and Software,Nanjing University of Information Science and Technology,Nanjing 210044,China;[3]Institute of Spacecraft System Engineering,Beijing 100094,China

出　　处：《China Communications》索引2019年第16卷第12期,共11页

基　　金：supported in part by the National Natural Science Foundation of China under Grant No.61871032;in part by Chinese Ministry of Education-China Mobile Communication Corporation Research Fund under Grant MCM20170101;in part by the Open Research Fund of Key Laboratory of Cognitive Radio and Information Processing,Ministry of Education (Guilin University of Electronic Technology) under Grant CRKL190204 摘　　要：To integrate the satellite communications with the LTE/5G services, the concept of Hybrid Satellite Terrestrial Relay Networks(HSTRNs) has been proposed. In this paper, we investigate the secure transmission in a HSTRN where the eavesdropper can wiretap the transmitted messages from both the satellite and the intermediate relays. To effectively protect the message from wiretapping in these two phases, we consider cooperative jamming by the relays, where the jamming signals are optimized to maximize the secrecy rate under the total power constraint of relays. In the first phase, the Maximal Ratio Transmission(MRT) scheme is used to maximize the secrecy rate, while in the second phase, by interpolating between the sub-optimal MRT scheme and the null-space projection scheme, the optimal scheme can be obtained via an efficient one-dimensional searching method. Simulation results show that when the number of cooperative relays is small, the performance of the optimal scheme significantly outperforms that of MRT and null-space projection scheme. When the number of relays increases, the performance of the null-space projection approaches that of the optimal one. 关键词：hybrid satellite terrestrial relay networks physical layer security cooperative jamming

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Cooperative Jamming for Physical Layer Security in Hybrid Satellite Terrestrial Relay Networks

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