Beam compensation methods for satellite communication system

摘要: Beam Compensation Methods pertain to the management of radio beams (11) which are generated by a constellation satellites (S). These precisely controlled so that they illuminate ''Earth-fixed cells'' as opposed ''satellite-fixed cells''. In previous satellite communication schemes, spacecraft not held stationary over one particular location on Earth in geo-synchronous orbits fly large regions very rapidly. system employs satellite-fixed cells, ''footprint'' (10) propagated defines zone ground called ''cell'' is illuminated spacecraft. This cell moves constantly around globe. sharp contrast, an cell'' (14) region mapped onto surface has permanent fixed boundaries, just like city or state.