TABLE 7 Study items for the 21 GHz band broadcasting-satellite services and the associated feeder-link systems BSS systems with the mitigation technique of orresponding Recommendations Broadcasting Study items Hierarchical Increase in e.i.r.p. system assuming transmission storage in receiver 1 Service availability Objective of Objective of Definition of – – – availability availability service against the against the availability for fading caused fading caused non-real time by precipitation by precipitation broadcasting P.618- 2 Attenuation caused Relation Fade dynamics Fade dynamics – – – by precipitation and between (Frequency and (Frequency and other meteorological attenuation and duration of duration of P.1623 factors time attenuation) attenuation) 3 Downlink e.i.r.p. or Derived by the Derived by the Derived by the – – – pfd required service required service required service availability and availability and availability and attenuation attenuation attenuation 4 Channel coding Modulation Modulation Modulation – – – BO.1408-1 scheme, scheme, scheme, BO.1516 interleave, etc. interleave, etc. interleave, etc. 5 Sharing criteria Protection Protection Protection BO.792 – – – ratios, pfd ratios, pfd ratios, pfd BO.1293-2 mask, / mask, / mask, /    T T, T T, T T, EPM, EPM, EPM, C/I, I/N C/I, I/N C/I, I/N 6 Methodology for Including the Including the Including the BO.1212 – – – interference satellite orbital satellite orbital satellite orbital calculation spacing, spacing, spacing, satellite station satellite station satellite station keeping keeping keeping
TABLE 7 Study items for the 21 GHz band broadcasting-satellite services and the associated feeder-link systems Study items BSS systems with the mitigation technique of orresponding Recommendations Increase in e.i.r.p. Hierarchical transmission Broadcasting system assuming storage in receiver 1 Service availability – Objective of availability against the fading caused by precipitation – Objective of availability against the fading caused by precipitation – Definition of service availability for non-real time broadcasting 2 Attenuation caused by precipitation and other meteorological factors – Relation between attenuation and time – Fade dynamics (Frequency and duration of attenuation) – Fade dynamics (Frequency and duration of attenuation) P.618- P.1623 3 Downlink e.i.r.p. or pfd – Derived by the required service availability and attenuation – Derived by the required service availability and attenuation – Derived by the required service availability and attenuation 4 Channel coding – Modulation scheme, interleave, etc. – Modulation scheme, interleave, etc. – Modulation scheme, interleave, etc. BO.1408-1 BO.1516 5 Sharing criteria – Protection ratios, pfd mask,  T / T, C/I, EPM, I/N – Protection ratios, pfd mask,  T / T, C/I, EPM, I/N – Protection ratios, pfd mask,  T / T, C/I, EPM, I/N BO.792 BO.1293-2 6 Methodology for interference calculation – Including the satellite orbital spacing, satellite station keeping – Including the satellite orbital spacing, satellite station keeping – Including the satellite orbital spacing, satellite station keeping BO.1212
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