학술논문
STAR-RIS-Enabled NOMA with Signal Constellation Adjustment for 6G LEO Satellite Networks
Document Type
Conference
Author
Source
2023 14th International Conference on Information and Communication Technology Convergence (ICTC) Information and Communication Technology Convergence (ICTC), 2023 14th International Conference on. :1653-1655 Oct, 2023
Subject
Language
ISSN
2162-1241
Abstract
In this paper, we investigate a simultaneous transmitting and reflecting-reconfigurable intelligent surface-enabled non–orthogonal multiple access (STAR-RIS-NOMA) technique for 6G low earth orbit (LEO) satellite networks. In particular, we focus on the problem of similar channel gains of user equipment (UE) when a direct path between LEO and UEs cannot be formed due to the surrounding terrain and buildings. In this paper, we propose a novel signal constellation scaling and rotation for the STAR-RIS-NOMA technique in LEO satellite networks. In addition, we consider a joint maximum likelihood (JML) detector that can achieve optimal performance in terms of bit-error-rates (BER) rather than a sub-optimal successive interference cancellation (SIC) detector. Through extensive simulations, we show that the proposed technique significantly improves the BER performance of LEO satellite networks.