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Author

F. Takawira

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Preprint Oct 2026

Beamforming Design for RIS-Assisted Backscatter NOMA in Underlay Cognitive Radio

This paper investigates a reconfigurable intelligent surface (RIS)-assisted backscatter non-orthogonal multiple access (NOMA) network operating as the secondary system of an underlay cognitive radio network. A multi-antenna base station serves several user clusters through the RIS, each containing a backscatter device...

Kgomotjo Seipobi, F. Takawira, Chabalala S. Chabalala · 0 citations
Conference Jul 2026

Multi-RIS-Aided Satellite-Terrestrial Downlink RSMA Communication for User Fairness Exploiting Statistical CSI

As the role of satellites in sixth generation mobile communications system becomes increasingly well defined, satellite-terrestrial communications face an urgent need to improve spectral efficiency while ensuring user fairness. In this paper, we propose a multiple transmissive reconfigurable intelligent surfaces (RISs)...

Kai Feng, Tianheng Xu, F. Takawira et al. · 0 citations

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