Satellite Transmission System

A satellite transmission system comprising at least one satellite and at least two stations, the said stations comprising transmission means adapted for transmitting simultaneously and in the same frequency band a first, high-bit-rate signal and a second, low-bit-rate signal, the second signal being adapted to allow the changing of the frequency of the carrier signal during the transmission, the said frequency of the carrier signal of the second signal moving throughout the whole frequency bandwidth used by the said first signal, the said station also comprising reception means adapted for receiving simultaneously and in the same frequency band the said first and the said second signal, the system further comprising:

• means for detecting the presence of interference on the said frequency band,
• the said transmission means and reception means being respectively adapted for switching the transmission and the reception of the said second signal from a low bit rate to a medium bit rate and for deactivating the transmission of the said first signal in the presence of interference, and
• the said transmission means and reception means being respectively adapted for switching the transmission and the reception of the said second signal from a medium bit rate to a low bit rate and for activating the transmission of the said first signal in the absence of interference.