Yao, Yu;
Zhang, Junhao;
Miao, Pu;
Zhang, Long;
Chen, Gaojie;
Shu, Feng;
Wong, Kai-Kit;
(2025)
Hybrid RIS-Enhanced ISAC Secure Systems: Joint Optimization in the Presence of an Extended Target.
IEEE Transactions on Communications
p. 1.
10.1109/TCOMM.2025.3610218.
(In press).
Preview |
PDF
Hybrid_RIS-Enhanced_ISAC_Secure_Systems_Joint_Optimization_in_the_Presence_of_an_Extended_Target.pdf - Accepted Version Download (2MB) | Preview |
Abstract
Unlike the conventional fully-passive and fully-active reconfigurable intelligent surfaces (RISs), a hybrid RIS consisting of active and passive reflection units has recently been concerned, which can exploit their integrated advantages to alleviate the RIS-induced path loss. In this paper, we investigate a novel security strategy where the multiple hybrid RIS-aided integrated sensing and communication (ISAC) system communicates with downlink users and senses an extended target synchronously. Assuming imperfectly known channel state information (CSI) for the eavesdropping target, we consider the joint design of the transmit signal and receive filter bank of the base station (BS), the receive beamformers of all users and the discrete reflection coefficients (DRC) of the multiple hybrid RIS. An optimization problem is formulated for maximizing the worst-case sensing signal-to-interference-plus-noise-ratio (SINR) subject to secure communication and system power budget constraints. To address this non-convex problem, we leverage generalized fractional programming (GFP) and penalty-dual-decomposition (PDD), and propose a security solution that efficiently optimizes all variables by employing convex optimization approaches. Simulation results show that by incorporating the multiple hybrid RIS into the optimization design, the extended target detection and secure transmission performance of ISAC systems are improved over the state-of-the-art RIS-aided ISAC approaches.
| Type: | Article |
|---|---|
| Title: | Hybrid RIS-Enhanced ISAC Secure Systems: Joint Optimization in the Presence of an Extended Target |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/TCOMM.2025.3610218 |
| Publisher version: | https://doi.org/10.1109/TCOMM.2025.3610218 |
| Language: | English |
| Additional information: | This version is the author-accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Integrated sensing and communication (ISAC), secure communication, hybrid reconfigurable intelligent surfaces (RISs), extended target detection, penalty-dual-decomposition (PDD) |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10214930 |
Archive Staff Only
 |
View Item |
