TY - JOUR
T1 - Physical layer security for cooperative NOMA systems
AU - Chen, Jianchao
AU - Yang, Liang
AU - Alouini, Mohamed Slim
N1 - Funding Information:
Manuscript received November 1, 2017; revised December 26, 2017; accepted December 29, 2017. Date of publication January 3, 2018; date of current version May 14, 2018. This work was supported in part by the National Natural Science Foundation of China under Grants 61372096 and 61671160, in part by the Department of Education of Guangdong Province (No. 2016KZDXM050), and in part by the open research fund of the National Mobile Communications Research Laboratory, Southeast University (No. 2018D01). The review of this paper was coordinated by Dr. R. D. Souza. (Corresponding author: Liang Yang.) J. Chen and L. Yang are with the Department of Communication Engineering, Guangdong University of Technology, Guangzhou 510006, China (e-mail: chenjianchou@qq.com; liangyang.guangzhou@gmail.com).
Publisher Copyright:
© 1967-2012 IEEE.
PY - 2018/5
Y1 - 2018/5
N2 - In this correspondence, we investigate the physical layer security for cooperative nonorthogonal multiple access (NOMA) systems, where both amplify-and-forward (AF) and decode-and-forward (DF) protocols are considered. More specifically, some analytical expressions are derived for secrecy outage probability (SOP) and strictly positive secrecy capacity. Results show that AF and DF almost achieve the same secrecy performance. Moreover, asymptotic results demonstrate that the SOP tends to a constant at high signal-to-noise ratio. Finally, our results show that the secrecy performance of considered NOMA systems is independent of the channel conditions between the relay and the poor user.
AB - In this correspondence, we investigate the physical layer security for cooperative nonorthogonal multiple access (NOMA) systems, where both amplify-and-forward (AF) and decode-and-forward (DF) protocols are considered. More specifically, some analytical expressions are derived for secrecy outage probability (SOP) and strictly positive secrecy capacity. Results show that AF and DF almost achieve the same secrecy performance. Moreover, asymptotic results demonstrate that the SOP tends to a constant at high signal-to-noise ratio. Finally, our results show that the secrecy performance of considered NOMA systems is independent of the channel conditions between the relay and the poor user.
KW - Non-orthogonal multiple access (NOMA)
KW - Relaying
KW - Secrecy outage probability (SOP)
KW - Strictly positive secrecy capacity (SPSC)
UR - http://www.scopus.com/inward/record.url?scp=85040067148&partnerID=8YFLogxK
U2 - 10.1109/TVT.2017.2789223
DO - 10.1109/TVT.2017.2789223
M3 - Article
AN - SCOPUS:85040067148
SN - 0018-9545
VL - 67
SP - 4645
EP - 4649
JO - IEEE Transactions on Vehicular Technology
JF - IEEE Transactions on Vehicular Technology
IS - 5
ER -