Rate-Matching Framework for RSMA-Enabled Multibeam LEO Satellite Communications
Jaehyup Seong, Juha Park, Juhwan Lee, Jungwoo Lee, Jung-Bin Kim,, Wonjae Shin, H. Vincent Poor

TL;DR
This paper introduces a rate-matching framework based on RSMA for multibeam LEO satellite communications, effectively managing heterogeneous traffic demands and phase perturbations to optimize power and interference handling.
Contribution
It proposes a novel RSMA-based rate-matching framework that accounts for phase perturbations and converts a non-convex problem into a convex form for efficient solution.
Findings
RSMA flexibly allocates power between common and private streams.
The framework effectively manages inter- and intra-beam interference.
Simulation results show improved traffic demand satisfaction under various conditions.
Abstract
With the goal of ubiquitous global connectivity, multibeam low Earth orbit (LEO) satellite communication (SATCOM) has attracted significant attention in recent years. The traffic demands of users are heterogeneous within the broad coverage of SATCOM due to different geological conditions and user distributions. Motivated by this, this paper proposes a novel rate-matching (RM) framework based on rate-splitting multiple access (RSMA) that minimizes the difference between the traffic demands and offered rates while simultaneously minimizing transmit power for power-hungry satellite payloads. Moreover, channel phase perturbations arising from channel estimation and feedback errors are considered to capture realistic multibeam LEO SATCOM scenarios. To tackle the non-convexity of the RSMA-based RM problem under phase perturbations, we convert it into a tractable convex form via the successive…
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Taxonomy
TopicsSatellite Communication Systems · Wireless Communication Networks Research · Advanced Wireless Communication Techniques
