Sum Rate Optimization for RIS-Aided RSMA with Movable Antenna

This paper addresses the limitations of fixed antenna elements in conventional RSMA-RIS architectures by proposing a movable-antenna (MA) assisted RSMA-RIS framework. It formulates a sum-rate maximization problem and provides a solution that jointly optimizes transmit beamforming, RIS reflection, common-rate partition, and MA positions. The research is significant because it explores a novel approach to enhance the performance of RSMA systems, a key technology for 6G wireless communication, by leveraging the spatial degrees of freedom offered by movable antennas. The use of fractional programming and KKT conditions to solve the optimization problem is a standard but effective approach.