This paper presents initial results available from the European Commission Horizon 2020 5G Public Private Partnership Phase 2 project "SaT5G" (Satellite and Terrestrial Network for 5G). 1 After describing the concept, objectives, challenges, and research pillars addressed by the SaT5G project, this paper elaborates on the selected use cases and scenarios for satellite communications positioning in the 5G usage scenario of enhanced mobile broadband.

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The purpose of the present paper is to characterize the next generation of HTS allowing to reach the Terabit/s satellite systems. The associated technologies are presented and the challenges ahead are reviewed and assessed proposing solutions to address the identified difficulties.

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