Link Adaptation Strategies for Next Generation Satellite Video Broadcasting: A System Approach

A new era for satellite video broadcasting is dawning as a result of two major developments: 1) the video codec bit rates required by new ultrahigh definition TV standards are multiples of current high definition TV and 2) satellite operators turn to multi-mission multi-beam Ka-band architectures in order to address the traffic uncertainties of a highly diversified and unpredictable market that mixes broadband and broadcast services. To continue being the prime provider of video broadcasting, the next generation of satellite broadcasting systems should exploit advanced system and physical layer concepts. Along this line, this paper carries out a detailed assessment of link adaptation strategies employing sophisticated tools to simulate system and propagation effects beyond today's constant coding and modulation paradigm. Specifically, the dimensioning of variable coding and modulation in a multibeam system, as well as the introduction of adaptive coding and modulation for broadcasting systems are addressed, and the strengths and weaknesses of each are highlighted through comprehensive simulations.

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