Method and system for broadcasting information from a satellite
First Claim
1. A method of transmitting or broadcasting information in digital form from a satellite to terrestrial receivers in the presence of a terrestrial network effecting links each occupying a specific and narrow frequency sub-band of an extended band, the sub-bands being assigned to different terrestrial zones within which the links are effected, according to which:
- the information is put into the form of digital symbols, the digital symbols are distributed over several carriers belonging to a group of carriers that are distributed within the whole of a channel covering at least four of said frequency sub-bands, employing spread spectrum.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention concerns a method for reducing mutual interference of a digital data transmission or broadcast from a satellite to terrestrial receivers and terrestrial network links using sub-bands each of specific and narrow frequency, belonging to an extended band, the sub-bands being assigned to different terrestrial zones wherein the links are provided. Therefor, 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 spread spectrum.
17 Citations
15 Claims
-
1. A method of transmitting or broadcasting information in digital form from a satellite to terrestrial receivers in the presence of a terrestrial network effecting links each occupying a specific and narrow frequency sub-band of an extended band, the sub-bands being assigned to different terrestrial zones within which the links are effected, according to which:
-
the information is put into the form of digital symbols, the digital symbols are distributed over several carriers belonging to a group of carriers that are distributed within the whole of a channel covering at least four of said frequency sub-bands, employing spread spectrum. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 14, 15)
-
-
10. A system for transmitting or broadcasting information programs in digital form on the downlink from a satellite to one or more terrestrial receivers, comprising:
-
means for putting the information into the form of digital symbols, and means for distributing the digital symbols of each program over several carriers belonging to the set of a group of carriers that are distributed in at least four sub-bands of a band assigned by a radio resource planning process for communication in disjoint sub-bands in a set of terrestrial zones exhibiting an overlap with the lobe of the satellite, employing spread spectrum. - View Dependent Claims (11, 12, 13)
-
Specification