TY - JOUR
T1 - STAR-RIS Aided Secure NOMA Integrated Sensing and Communication
AU - Wei, Wenjing
AU - Pang, Xiaowei
AU - Xing, Chengwen
AU - Zhao, Nan
AU - Niyato, Dusit
N1 - Publisher Copyright:
IEEE
PY - 2024
Y1 - 2024
N2 - Integrated sensing and communication (ISAC) has attracted plenty of attentions as an up-and-coming approach to address the spectrum congestion via sharing the same hardware platform. However, including communication information in the sensing waveform will raise the risk of eavesdropping by the sensing targets as the eavesdroppers. In this paper, we investigate a secure transmission problem in a simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) assisted ISAC system, which is segmented into a sensing region and a communication region. The STAR-RIS is deployed to build line-of-sight (LoS) links for sensing the target as well as transmitting the confidential signal to users via non-orthogonal multiple access. Specifically, the sum secrecy rate is maximized by jointly optimizing the transmit beamforming, artificial jamming and STAR-RIS’s passive transmission and reflection beamformings, while ensuring the minimum beampattern gain required by the target. To deal with the non-convex problem, we divide it into two subproblems and leverage successive convex approximation to transform them into convex ones. Then, an alternating optimization algorithm is proposed to solve the problem in an iterative manner. Simulation results demonstrate the validity of the proposed scheme and the potential of STAR-RIS to enhance the security of ISAC.
AB - Integrated sensing and communication (ISAC) has attracted plenty of attentions as an up-and-coming approach to address the spectrum congestion via sharing the same hardware platform. However, including communication information in the sensing waveform will raise the risk of eavesdropping by the sensing targets as the eavesdroppers. In this paper, we investigate a secure transmission problem in a simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) assisted ISAC system, which is segmented into a sensing region and a communication region. The STAR-RIS is deployed to build line-of-sight (LoS) links for sensing the target as well as transmitting the confidential signal to users via non-orthogonal multiple access. Specifically, the sum secrecy rate is maximized by jointly optimizing the transmit beamforming, artificial jamming and STAR-RIS’s passive transmission and reflection beamformings, while ensuring the minimum beampattern gain required by the target. To deal with the non-convex problem, we divide it into two subproblems and leverage successive convex approximation to transform them into convex ones. Then, an alternating optimization algorithm is proposed to solve the problem in an iterative manner. Simulation results demonstrate the validity of the proposed scheme and the potential of STAR-RIS to enhance the security of ISAC.
KW - Array signal processing
KW - Artificial jamming
KW - Jamming
KW - NOMA
KW - Robot sensing systems
KW - Sensors
KW - Signal to noise ratio
KW - Wireless communication
KW - integrated sensing and communication
KW - physical layer security
KW - simultaneously transmitting and reflecting intelligent surface
UR - http://www.scopus.com/inward/record.url?scp=85188742417&partnerID=8YFLogxK
U2 - 10.1109/TWC.2024.3374728
DO - 10.1109/TWC.2024.3374728
M3 - Article
AN - SCOPUS:85188742417
SN - 1536-1276
SP - 1
JO - IEEE Transactions on Wireless Communications
JF - IEEE Transactions on Wireless Communications
ER -