Interference mitigation techniques for air to ground systems

Patent metadata

Field	Value
Publication number	US-9319172-B2
Application number	US-201213550071-A
Country	US
Kind code	B2
Filing date	Jul 16, 2012
Priority date	Oct 14, 2011
Publication date	Apr 19, 2016
Grant date	Apr 19, 2016

Abstract

A method for air to ground communication interference mitigation within an aircraft equipped with a multi-beam array antenna includes adjusting a modulation symbol interleaving and/or forward error correction of an aircraft receiver interface in response to detected interference from an interferer. The method further includes reducing a data rate of the aircraft receiver interface when the adjusting of the modulation symbol interleaving and/or forward error correction does not mitigate the detected interference. Another method for interference mitigation may include performing antenna beam-steering away from a geographic (GEO) arc during an aircraft turn. This method further includes reducing an aircraft transmitter transmit power when a signal quality of a forward link is within a predetermined range of a signal quality threshold.

First claim

What is claimed is:

1. A method for air to ground communication interference mitigation within an aircraft equipped with a multi-beam array antenna, comprising:
adjusting a modulation symbol interleaving and/or forward error correction of an aircraft receiver interface in response to detected interference from a forward link of an interferer aircraft;
reducing a data rate of the aircraft receiver interface when the adjusting of the modulation symbol interleaving and/or forward error correction does not mitigate the detected interference, from the forward link of the interferer aircraft, on communications received by the aircraft receiver interface from a serving ground station through the multi-beam array antenna; and
providing aircraft internet service based on the communications received by the aircraft receiver interface from the serving ground station through the multi-beam array antenna.

2. The method of claim 1 , in which the interferer aircraft includes an aeronautical mobile satellite service (AMSS) transmitter.

3. The method of claim 1 , further comprising:
assigning the aircraft receiver interface a portion of a communication spectrum that is unused by the interferer aircraft when reducing the data rate of the aircraft receiver interface does not mitigate the detected interference from the forward link of the interferer aircraft.

4. The method of claim 1 , further comprising:
handing-off the aircraft receiver interface to a different ground station when reducing the data rate of the aircraft receiver interface does not mitigate the detected interference from the forward link of the interferer aircraft.

5. A method for air to ground communication interference mitigation within an aircraft equipped with a multi-beam array antenna, comprising:
adjusting a modulation symbol interleaving and/or forward error correction of an aircraft receiver interface in response to detected interference from an interferer;
reducing a data rate of the aircraft receiver interface when the adjusting of the modulation symbol interleaving and/or forward error correction does not mitigate the detected interference, from the interferer;
performing antenna beam-steering away from a geographic (GEO) arc during an aircraft turn; and
disabling an aircraft transmitter when a roll-angle of the aircraft turn is greater than or equal to a predetermined roll-angle threshold.

6. An apparatus configured for air to ground communication interference mitigation within an aircraft equipped with a multi-beam array antenna, the apparatus comprising:
a memory; and
at least one processor coupled to the memory, the at least one processor being configured:
to adjust a modulation symbol interleaving and/or forward error correction of an aircraft receiver interface in response to detected interference from a forward link of an interferer aircraft;
to reduce a data rate of the aircraft receiver interface when the adjusting of the modulation symbol interleaving and/or forward error correction does not mitigate the detected interference, from the forward link interferer aircraft, on communications received by the aircraft receiver interface from a serving ground station through the multi-beam array antenna; and
to provide aircraft internet service based on the communications received by the aircraft receiver interface from the serving ground station through the multi-beam array antenna.

7. The apparatus of claim 6 , in which the interferer aircraft includes an aeronautical mobile satellite service (AMSS) transmitter.

8. The apparatus of claim 6 , in which the at least one processor is further configured to assign the aircraft receiver interface a portion of a communication spectrum that is unused by the interferer when reducing the data rate of the aircraft receiver interface does not mitigate the detected interference from the forward link of the interferer aircraft.

9. The apparatus of claim 6 , in which the at least one processor is further configured to hand-off the aircraft receiver interface to a different ground station when reducing the data rate of the aircraft receiver interface does not mitigate the detected interference from the forward link of the interferer aircraft.

10. An apparatus configured for air to ground communication interference mitigation within an aircraft equipped with a multi-beam array antenna, the apparatus comprising:
a memory; and
at least one processor coupled to the memory, the at least one processor being configured:
to adjust a modulation symbol interleaving and/or forward error correction of an aircraft receiver interface in response to detected interference from an interferer;
to reduce a data rate of the aircraft receiver interface when the adjusting of the modulation symbol interleaving and/or forward error correction does not mitigate the detected interference, from the interferer;
to perform antenna beam-steering away from a geographic (GEO) arc during an aircraft turn; and
to disable an aircraft transmitter when a roll-angle of the aircraft turn is greater than or equal to a predetermined roll-angle threshold.

11. A computer program product configured for air to ground communication interference mitigation within an aircraft equipped with a multi-beam array antenna, the computer program product comprising:
a non-transitory computer-readable medium having non-transitory program code recorded thereon, the program code comprising:
program code to adjust a modulation symbol interleaving and/or forward error correction of an aircraft receiver interface in response to detected interference from a forward link of an interferer aircraft;
program code to reduce a data rate of the aircraft receiver interface when the adjusting of the modulation symbol interleaving and/or forward error correction does not mitigate the detected interference, from the forward link of interferer aircraft, on communications received by the aircraft receiver interface from a serving ground station through the multi-beam array antenna; and
program code to provide aircraft internet service based on the communications received by the aircraft receiver interface from the serving ground station through the multi-beam array antenna.

12. An apparatus operable for air to ground communication interference mitigation within an aircraft equipped with a multi-beam array antenna, the apparatus comprising:
means for adjusting a modulation symbol interleaving and/or forward error correction of an aircraft receiver interface in response to detected interference from a forward link of an interferer aircraft;
means for reducing a data rate of the aircraft receiver interface when the adjusting of the modulation symbol interleaving and/or forward error correction does not mitigate the detected interference, from the forward link of the interferer aircraft, on communications received by the aircraft receiver interface from a serving ground station through the multi-beam array antenna; and
means for providing aircraft internet service based on the communications received by the aircraft receiver interface from the serving ground station through the multi-beam array antenna.

Assignees

• Jalali Ahmad
• Tian Bin
• Schiff Leonard N
• Ames William G
• Qualcomm Inc

Inventors

• Jalali Ahmad
• Tian Bin
• Schiff Leonard N
• Ames William G

Classifications

• H04B7/18506

  Communications with or from aircraft, i.e. aeronautical mobile service · CPC title

• H04B7/18508 Primary

  with satellite system used as relay, i.e. aeronautical mobile satellite service · CPC title

• H01Q3/24

  varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching · CPC title

• H01Q1/282 Primary

  Modifying the aerodynamic properties of the vehicle, e.g. projecting type aerials · CPC title

• H01Q25/00

  Antennas or antenna systems providing at least two radiating patterns (arrangements for changing or varying the orientation or the shape of the directional pattern H01Q3/00) · CPC title