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S. Althunibat

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Open access 2026

HAP-Based Underlay Non-Terrestrial Networks With Imperfect CSI: Joint RSMA Transmission and Beyond-Diagonal RIS Beamforming

Simulation results demonstrate the effectiveness of the proposed framework and show that the BD-RIS-assisted system achieves up to a 45.2% sum-rate improvement compared with conventional single-connected RIS (SC-RIS) architectures while maintaining robustness against CSI uncertainty and satisfying all system constraints.

Zain Ali, Muhammad Asif, S. Althunibat et al. · 0 citations