Secure transmission in backhaul NOMA systems:A physical layer security design with untrusted user and eavesdropper  

作　　者：Chi-Bao Le Dinh-Thuan Do Miroslav Voznak 

机构地区：[1]Faculty of Electronics Technology,Industrial University of Ho Chi Minh City(IUH),Ho Chi Minh City,70000,Viet Nam [2]School of Engineering,University of Mount Union,Alliance,OH 44601-3993,USA [3]VSB Technical University of Ostrava,17 Listopadu 15/2172,70833,Ostrava,Poruba,Czech Republic

出　　处：《Digital Communications and Networks》2024年第4期1001-1013,共13页数字通信与网络（英文版）

摘　　要：In order to improve the Physical Layer Security(PLS)perspective,this paper aims to empower function of PLS by considering a backhaul Non-Orthogonal Multiple Access(NOMA)system in two practical situations.In the proposed schemes,the untrusted user intercepts information transmitted to the far user,or the external eavesdropper overhears confidential information sent to the far user in the context of NOMA technique.Unlike the conventional NOMA systems,this paper emphasizes the actual situations of the existence of actual illegal users and legitimate users,especially the reasonable use of relay selection architecture to improve the confidentiality performance.To evaluate the security properties of the proposed scheme,a comprehensive analysis of the Security Outage Probability(SOP)performance is first performed,and then the corresponding SOP asymptotic expressions are derived for real scenarios related to eavesdroppers and untrusted users.Numerical results are performed to verify the analysis in terms of the secure performance metric.

关 键 词：Non-orthogonal multiple access(NOMA) Wireless backhaul Secure outage probability Power allocation 

分 类 号：TN915.08[电子电信—通信与信息系统]