Abstract
This paper explores a secure downlink multiple-input single-output (MISO) system using simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) aided rate splitting multiple access (RSMA), where a base station transmits confidential signals to users, combating eavesdroppers in both transmission and reflection spaces of the RIS. Assuming known channel state information (CSI) at the base station, the RSMA strategy involves splitting user messages into common and private parts, aiming to maximize the sum secrecy rate under power and beamforming constraints. We address the non-convex optimization challenge through alternating optimization and the sequential convex approximation (SCA) method, focusing on both active and passive beamforming. Our simulations highlight notable enhancements in secrecy rate and spectral efficiency via STAR-RIS, underscoring the effectiveness of our algorithms. Furthermore, our approach outperforms the non-orthogonal multiple access (NOMA) technique.
Original language | English |
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Journal | 2024 IEEE International Mediterranean Conference on Communications and Networking, MeditCom 2024 |
Pages (from-to) | 529-534 |
Number of pages | 6 |
DOIs | |
Publication status | Published - 2024 |
Event | 2024 IEEE International Mediterranean Conference on Communications and Networking, MeditCom 2024 - Madrid, Spain Duration: 8 Jul 2024 → 11 Jul 2024 |
Conference
Conference | 2024 IEEE International Mediterranean Conference on Communications and Networking, MeditCom 2024 |
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Country/Territory | Spain |
City | Madrid |
Period | 08/07/2024 → 11/07/2024 |
Sponsor | Huawei Technologies Co., Ltd., Universidad Carlos III de Madrid (UC3M), Viavi |
Bibliographical note
Publisher Copyright:© 2024 IEEE.
Keywords
- physical layer security
- Rate-Splitting
- reconfigurable intelligent surfaces
- simultaneous transmission and reflection