Secrecy Transmission of NOMA-OTFS Based Multicast-Unicast Streaming  

作　　者：Junfan Hu Jia Shi Xianyu Wang Xiaoju Lu Zan Li Zhuangzhuang Tie Quanxue Gao 

机构地区：[1]The State Key Laboratory of Integrated Services Networks,Xidian University,Xi’an 710071,China [2]Academy of Space Electronic Information Technology,Xi’an 710100,China [3]Unit 69036 of PLA,Urumqi 830000,China

出　　处：《China Communications》2023年第1期1-13,共13页中国通信（英文版）

基　　金：supported in part by the National Natural Science Foundation of China(No.61941105,No.61901327 and No.62101450);in part by the National Natural Science Foundation for Distinguished Young Scholar(No.61825104);in part by the Fundamental Research Funds for the Central Universities(JB210109);in part by the Foundation of State Key Laboratory of Integrated Services Networks of Xidian University(ISN22-03)。

摘　　要：This paper investigates the security performance of a cooperative multicast-unicast system,where the users present the feature of high mobility.Specifically,we develop the non-orthogonal multiple access(NOMA)based orthogonal time frequency space(OTFS)transmission scheme,namely NOMAOTFS,in order to combat Doppler effect as well as to improve the spectral efficiency.Further,we propose a power allocation method addressing the trade-off between the reliability of multicast streaming and the confidentiality of unicast streaming.Based on that,we utilize the relay selection strategy,to improve the security of unicast streaming.In the context of multicastunicast streaming,our simulation findings validate the effectiveness of the NOMA-OTFS based cooperative transmission,which can significantly outperform the existing NOMA-OFDM in terms of both reliability and security.

关 键 词：OTFS NOMA physical layer security multicast-unicast 

分 类 号：TN918[电子电信—通信与信息系统]