Patent ID: 9667339
Date: 2017-05-30
CPC Classifications: H04B,H04J

Claim:
1. A satellite telecommunication system with multispot coverage and with variable capacity distribution, comprising: at least one gateway station associated with users located in different cells evenly distributed in a geographic coverage area, at least one repeater mounted on board a satellite and configured to relay radiofrequency signals between the at least one gateway station and the users, the at least one repeater configured to operate in a plurality of reception channels connected to at least one spot generation device, all the reception channels having an identical bandwidth, each spot covering a dedicated user cell, wherein the at least one spot generation device includes channel amplifiers with a variable gain and with a constant output and power to equalize power levels of all the reception channels, output power levels of all the channel amplifiers being constant and identical for all the reception channels, frequency demultiplexers respectively connected at an output of the channel amplifiers to split the bandwidth assigned to each of the reception channels into N sub-bands having a same width and corresponding to N different carriers, N being an integer greater than 1, at least one device for selecting and distributing all the carriers between all the spots, two adjacent carriers in a given reception channel being assigned to two different spots, and frequency combiners respectively dedicated to each of the two different spots to combine the carriers selected for a corresponding spot, a number of carriers assigned to each spot being variable from one spot to another spot as a function of usage needs of corresponding users, wherein the device for selecting and distributing carriers includes two-position switches and three-position switches, the switches selectively linking, depending on respective positions, each carrier to a frequency combiner chosen from amongst the frequency combiners.