# US 2013/0155944 A1 · Satellite Transmission System

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- Number: US 2013/0155944 A1
- Document ID: US20130155944A1
- Status: Published application
- Kind: A1
- Application number: 13/716,183
- Filed: 2012-12-16
- Published: 2013-06-20
- Earliest claimed: 2011-12-16
- Assignees: Thales
- Inventors: Marc TOURET
- Web page: https://patentgrep.com/patent/US20130155944A1

## CPC

- H04W 52/34: TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
- H04B 7/18515: {Transmission equipment in satellites or space-based relays}
- H04W 52/243: {taking into account interferences}
- H04W 24/02: Arrangements for optimising operational condition
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04B: TRANSMISSION

## Abstract

A satellite transmission system comprises at least: one satellite and two stations comprising transmission means transmitting simultaneously and in the same frequency band a first, high-bit-rate signal and a second, low-bit-rate signal, the second signal allowing changing of frequency of the carrier signal. The station(s) include reception means for receiving simultaneously and in the same frequency band the first and second signal. The system includes means for detecting interference on the frequency band. The transmission means and reception means respectively switch the transmission and reception of the second signal from a low bit rate to a medium bit rate and deactivate the transmission of the first signal in presence of interference, and the transmission means and reception means respectively switch the transmission and reception of the second signal from a medium bit rate to a low bit rate and activate transmission of the first signal in absence of interference.

## Claims

### Claim 1

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.

### Claim 2 (depends on 1)

The system according to claim 1, in which the transmission means and reception means are adapted for maintaining the transmission between the transmitter and the receiver during the switching of the said first and of the said second signal.

### Claim 3 (depends on 2)

The system according to claim 2, comprising at least two stations, in which at least two of the said stations are not contained in one and the same satellite spot.

### Claim 4 (depends on 1)

The system according to claim 1, comprising at least two stations, in which at least two of the said stations are not contained in one and the same satellite spot.

### Claim 5

A satellite transmission method comprising:
detecting an interference,
reconfiguring transmission means and reception means in order to deactivate the transmission of a first, high-bit-rate signal and to switch the transmission and the reception of a second, low-bit-rate signal to a medium bit rate in the presence of interference, and
reconfiguring the said transmission means and the said reception means in order to activate the transmission of the said first, high-bit-rate signal and to switch the transmission and the reception of the said second signal from a medium bit rate to a low bit rate in the absence of interference.