Salem, Abdelhamid;
Wong, Kai-Kit;
Chae, Chan-Byoung;
Zhang, Yangyang;
(2025)
STAR-RIS Assisted Full-Duplex NOMA Communication Networks.
IEEE Transactions on Wireless Communications
10.1109/twc.2024.3521869.
(In press).
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Abstract
Different from conventional reconfigurable intelligent surfaces (RIS), a recent innovation called simultaneous transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) has emerged, aimed at achieving complete 360-degree coverage in communication networks. Additionally, full-duplex (FD) technology is recognized as a potent approach for enhancing spectral efficiency by enabling simultaneous transmission and reception within the same time and frequency resources. In this study, we investigate the performance of a STAR-RIS-assisted FD communication system. The STAR-RIS is strategically placed at the cell-edge to facilitate communication for users located in this challenging region, while cell-center users can communicate directly with the FD base station (BS). We employ a non-orthogonal multiple access pairing scheme and account for system impairments, such as self-interference at the BS and imperfect successive interference cancellation. We derive closed-form expressions for the ergodic rates in both the up-link and down-link communications and extend our analysis to bidirectional communication between cell-center and cell-edge users. Furthermore, we formulate an optimization problem aimed at maximizing the ergodic sum-rate. This optimization involves adjusting the amplitudes and phase-shifts of the STAR-RIS elements and allocating total transmit power efficiently. To gain deeper insights into the achievable rates of STAR-RIS-aided FD systems, we explore the impact of various system parameters through numerical results.
| Type: | Article |
|---|---|
| Title: | STAR-RIS Assisted Full-Duplex NOMA Communication Networks |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/twc.2024.3521869 |
| Publisher version: | https://doi.org/10.1109/twc.2024.3521869 |
| 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: | Full-duplex, simultaneous transmitting and reflecting reconfigurable intelligent surface, non-orthogonal multiple access |
| 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/10203188 |
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