telecommunications satellite system and method multibeam beamforming

A satellite (2) multibeam telecommunications, intended to be placed in earth orbit, and adapted to relay data between terrestrial terminals (T) and at least one ground station (3) and form beams of a connecting users between the satellite (2) and ground terminals (T) comprises a beam forming module (200) on board of said satellite, a beam processing module formed on the ground (201) by the ground station (3), and a module routing (202) the received signals from the ground station (3) and / or terrestrial terminals (T), beam signals of the formed edge being routed to the beamforming module board (200), and signal beams formed on the ground are routed to the beam processing module formed on the ground (201). The invention also relates to a system (1) comprising the telecommunications satellite (2) multibeam, a ground station (3) and a management center (4) of the beams adapted to divide the beams from a group of beams formed on the ground and a group of beams formed on board. The invention also relates to a beamforming method.