TY - JOUR
T1 - Secure Transmission for STAR-RIS Aided NOMA Against Internal Eavesdropping
AU - Han, Hui
AU - Cao, Yang
AU - Deng, Na
AU - Xing, Chengwen
AU - Zhao, Nan
AU - Li, Yonghui
AU - Wang, Xianbin
N1 - Publisher Copyright:
© 1967-2012 IEEE.
PY - 2023/11/1
Y1 - 2023/11/1
N2 - Simultaneous transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) has attracted extensive attentions due to its prominent advantages to future wireless networks. This correspondence considers a downlink multi-input single-output non-orthogonal multiple access system, in which the STAR-RIS is utilized to improve the secrecy performance. To restrain the internal eavesdropping, we formulate a secrecy rate maximization problem and propose a secure transmission design via the joint active and passive beamforming optimization with optimum power allocation. To decouple optimization variables, the original non-convex problem is divided into two subproblems, which are transformed into convex forms via successive convex approximation and solved by alternating optimization. Simulation results demonstrate the superiority of the proposed scheme in the security enhancement.
AB - Simultaneous transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) has attracted extensive attentions due to its prominent advantages to future wireless networks. This correspondence considers a downlink multi-input single-output non-orthogonal multiple access system, in which the STAR-RIS is utilized to improve the secrecy performance. To restrain the internal eavesdropping, we formulate a secrecy rate maximization problem and propose a secure transmission design via the joint active and passive beamforming optimization with optimum power allocation. To decouple optimization variables, the original non-convex problem is divided into two subproblems, which are transformed into convex forms via successive convex approximation and solved by alternating optimization. Simulation results demonstrate the superiority of the proposed scheme in the security enhancement.
KW - Beamforming optimization
KW - non-orthogonal multiple access
KW - physical layer security
KW - simultaneous transmitting and reflecting reconfigurable intelligent surface
UR - http://www.scopus.com/inward/record.url?scp=85161026300&partnerID=8YFLogxK
U2 - 10.1109/TVT.2023.3281470
DO - 10.1109/TVT.2023.3281470
M3 - Article
AN - SCOPUS:85161026300
SN - 0018-9545
VL - 72
SP - 15068
EP - 15073
JO - IEEE Transactions on Vehicular Technology
JF - IEEE Transactions on Vehicular Technology
IS - 11
ER -