| 摘要 |
The method for reducing mutual interference of a digital data transmission or broadcast from a satellite to a terrestrial receiver uses broadcast through sub-bands. The sub-bands are assigned to different terrestrial zones in which terrestrial network links are provided. The information from the satellite is distributed over several carriers belonging to a group of carriers distributed in a channel assembly covering at least four of the frequency sub-bands, by spectral spreading. The method for reducing mutual interference of a digital data transmission or broadcast from a satellite to a terrestrial receiver uses broadcast through sub-bands each of specific and narrow frequency. The sub-bands belong to an extended band, the sub-bands being assigned to different terrestrial zones in which terrestrial network links are provided. The information from the satellite is converted in the form of digital symbols, and the digital symbols are distributed over several carriers belonging to a group of carriers distributed in a channel assembly covering at least four of the frequency sub-bands, by spectral spreading. The channel uses a width of 170MHz for a satellite link in the 620-790MHz band, and a width of 392MHz for a satellite link in the 470-862MHz band.
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