Beam-hopping systems for next-generation satellite communication systems

Beam-hopping systems for next-generation satellite communication systems

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In this chapter, the concepts and benefits of beam-hopping were presented along with some detection performance considerations. In particular, the gains in user satisfaction and system usable throughput were compared to that of a conventional broadband satellite system with a static coverage. Complementing the beam-hopping system principles, we discussed the physical layer transmission solutions suitable for beamhopping. Based on the identified waveform key-requirements for applying beamhopping, the already released DVB-S2X standard was reviewed and analysed using practical and representative system examples. It was found that the super-framing specification offers high practical relevance compared to the conventional DVBS2/S2X framing. The author also presented actual and future technology for a beam-hopping systems. Specifically, the upcoming Eutelsat Quantum-class satellite designed for beamhopping was presented along with its features like re-configurable beam-forming and highlights potential applications. The corresponding ground equipment was also discussed exploiting the advantages of wideband processing. Furthermore, implementation feasibility has been demonstrated by means of detection performance results exploiting DVB-S2X SF Format 4. Beam-hopping offers flexible system architecture to address changing traffic demands over time and geographical locations by sharing in time, power and frequency resources among multiple beams. Beam-hopping systems offer higher usable throughput by focusing the system resources where they are most needed at a time.

Chapter Contents:

  • 10.1 Introduction
  • 10.2 Beam-hopping system concepts
  • 10.3 Application of DVB-S2X waveform for beam-hopping
  • 10.3.1 DVB-S2X conventional framing
  • 10.3.2 DVB-S2X Annex E super-framing
  • Super-framing Format 0 and 1: S2 and S2X conventional frames
  • Super-framing Format 2 and 3: bundled frames structure
  • Super-framing Format 4: flexible wideband approach
  • 10.3.3 Waveform conclusion
  • 10.4 Technology and implementation
  • 10.4.1 Upcoming Eutelsat Quantum satellite for beam-hopping
  • Beam-forming and beam-hopping
  • Full duplex versus half duplex
  • 10.4.2 Wideband transmission for beam-hopping
  • 10.4.3 Network synchronization aspects
  • 10.4.4 Signal synchronization at terminals
  • Reception scenarios
  • Power detection
  • Super-frame-related performance figures
  • 10.5 Summary and conclusions
  • References

Inspec keywords: telecommunication traffic; digital video broadcasting; array signal processing; satellite communication

Other keywords: DVB-S2X SF Format 4; wideband processing; user satisfaction; physical layer transmission solutions; super-framing specification; geographical locations; frequency resource; Eutelsat Quantum-class satellite; changing traffic demands; power resource; DVB-S2X standard; beam-hopping system principles; time resource; next-generation satellite communication systems; system usable throughput; waveform key-requirements; reconfigurable beam-forming

Subjects: Signal processing and detection; Radio and television broadcasting; Satellite communication systems

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