Power Allocation for Common and Private Messages in LEO-Terrestrial RSMA Networks

The increasing demand for high-capacity wireless communication has led to the investigation of advanced multiple access techniques. Rate Splitting Multiple Access (RSMA) stands out for its interference management capabilities, while Low Earth Orbit (LEO) satellite networks offer global, high-speed coverage. This work explores the integration of RSMA into LEO satellite systems, aiming to maximize the total data rate. We propose a low-complexity approach by designing private and common precoders and optimizing transmit power allocation. Simulations demonstrate that the method achieves superior data rates and robustness under imperfect channel conditions, outperforming conventional benchmark solutions.