Aircraft satellite television system for distributing television programming derived from direct broadcast satellites

• US 5,790,175 A
• Filed: 06/19/1996
• Issued: 08/04/1998
• Est. Priority Date: 06/19/1996
• Status: Expired due to Fees

• Current Assignee: Rockwell International Corporation
• Original Assignee: Hughes Aircraft Company (Rtx Corporation)
• Inventors: Frankenbach, David C., Williams, Jim C., Girard, Lawrence E., Sklar, Richard E., Phillipp, Ralph P., Berry, Dickey J.
• Primary Examiner(s): Grant, Christopher C.
• Application Number:
  US08/667,222
• Time in Patent Office: 776 Days
• Field of Search: 348/8, 348/6, 348/7, 348/12, 348/13, 348/14, 348/15, 348/16, 348/17, 348/18, 348/10, 348/11, 455/4.2, 455/4.1, 455/5.1, 455/6.1, 455/6.2, 455/6.3, 455/289, 455/293, 455/3, 455/2
• US Class Current: 725/76
• CPC Class Codes: H01Q 1/1257 using the received signal strength
• CPC Class Codes: H01Q 1/28 Adaptation for use in or on aircraft, missiles, satellites, or balloons
• CPC Class Codes: H04H 20/62 for transportation systems, e.g. in vehicles
• CPC Class Codes: H04H 40/90 specially adapted for satellite broadcast receiving
• CPC Class Codes: H04N 7/18 Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
• CPC Class Codes: H04N 7/20 Adaptations for transmission via a GHz frequency band, e.g. via satellite

Abstract

A system that provides live television programming to passengers by integrating direct broadcast satellite services into an in-flight aircraft entertainment system. The present invention is a satellite television system that has an antenna disposed on the aircraft that is pointed at a plurality of satellites that are part of a direct broadcast satellite system. The antenna is controlled by an antenna controller and antenna interface unit that send control signals and process status signals to steer the antenna. The antenna is steered to lock it onto RF signals transmitted by the satellites. The antenna interface unit downconverts the received RF signals to provide left hand circularly polarized RF signals and right hand circularly polarized RF signals that contain different sets of television channels. The downconverted RF signals are processed by a receiver/decoder that decodes them to provide video signals corresponding to different television channels. The video signals for the different channels are routed to an video and audio distribution system on the aircraft which distributes live television programming to the passengers. A low-cost single channel receiver/decoder version of the system is also disclosed that provides a single channel of television programming to overhead monitors in an aircraft.

Claims

1. A satellite television system that provides live television programming to passengers on an aircraft derived from direct broadcast satellites, said system comprising:

a video and audio distribution system disposed on the aircraft for distributing video signals to the passengers on the aircraft;

an antenna that comprises steering means for steering the antenna toward the satellite in response to control signals supplied thereto;

antenna control means for providing the control signals to the antenna and for processing status signals derived from the antenna to steer the antenna so that it is locked onto RF signals transmitted by the satellite, and for downconverting the RF signals to provide left hand and right hand circularly polarized RF signals that correspond to a plurality of television channels; and

a receiver/decoder coupled to the antenna control means for processing the downconverted RF signals to provide video signals corresponding to the plurality of television channels, and for feeding back the status signals to the antenna control means which are used to steer the antenna to lock it onto the RF signals received from the satellite, and for outputting the video signals to the video and audio distribution system which distributes live television programming to the passengers.

2. The system of claim 1 wherein the antenna control means comprises:

an antenna controller coupled to the receiver/decoder for processing status signals derived therefrom; and

an antenna interface unit coupled between the antenna and the receiver decoder for downconverting the RF signals to provide the left hand and right hand circularly polarized RF signals that contain different sets of television channels, and coupled between the antenna controller and the antenna for coupling the control and status signals therebetween.

3. The system of claim 2 wherein the antenna controller comprises:

a controller;

an RS485 interface coupled between the controller and the antenna interface unit for coupling the control and status signals to the controller; and

an ARINC 429 interface coupled between the controller and a navigation system for coupling inertial reference signals provided by the navigation system to the controller which are used to generate steering signals that steer the antenna toward the satellite.

4. The system of claim 2 wherein the antenna interface unit comprises:

a downconverter for downconverting the RF signals received from the antenna and for outputting the downconverted RF signals to the receiver/decoder;

a servo controller coupled between the RS485 interface of the antenna controller and the antenna for processing antenna position signals to generate elevation motor drive signals that are supplied to the antenna, and for outputting azimuth control signals;

a servo power amplifier coupled between the servo controller and the antenna for supplying power to the antenna, and for processing motor position control signals derived from the antenna and the azimuth control signals derived from the servo controller to generate azimuth motor drive signals that are supplied to the antenna.

5. The system of claim 1 wherein the receiver/decoder comprises:

a passive mother board having first and second computer busses;

a receiver/decoder card coupled to the first computer bus;

a computer processor coupled to the first computer bus;

a rotary switch coupled to the computer processor for selecting channels for viewing; and

a flash disk card coupled to the second bus for storing video, audio and control signals.

6. A satellite television system that provides a single channel of live television programming to overhead monitors mounted throughout an aircraft derived from direct broadcast satellites, said system comprising:

a video and audio distribution system disposed on the aircraft for distributing video signals to the passengers on the aircraft on overhead monitors mounted throughout the aircraft;

an antenna that is disposed adjacent a surface of the aircraft and that comprises steering means for steering the antenna toward the satellite in response to control signals supplied thereto;

antenna control means for providing the control signals to the antenna and for processing status signals derived from the antenna to steer the antenna so that it is locked onto RF signals transmitted by the satellite, and for downconverting the RF signals to provide left hand and right hand circularly polarized RF signals that correspond to a plurality of television channels; and

a receiver/decoder coupled to the antenna control means for processing the downconverted RF signals to provide video signals corresponding to the plurality of television channels, and for feeding back the status signals to the antenna control means which are used to steer the antenna to lock it onto the RF signals received from the satellite, and for outputting the video signals corresponding to a single television channel to the video and audio distribution system which distributes live television programming corresponding to the single television channel to the overhead monitors mounted throughout the aircraft.

7. The system of claim 6 wherein the antenna control means comprises:

an antenna controller coupled to the receiver/decoder for processing status signals derived therefrom; and

an antenna interface unit coupled between the antenna and the receiver decoder for downconverting the RF signals to provide the left hand and right hand circularly polarized RF signals that contain different sets of television channels, and coupled between the antenna controller and the antenna for coupling the control and status signals therebetween.

8. The system of claim 7 wherein the antenna controller comprises:

a controller;

an RS485 interface coupled between the controller and the antenna interface unit for coupling the control and status signals to the controller; and

an ARINC 429 interface coupled between the controller and a navigation system for coupling inertial reference signals provided by the navigation system to the controller which are used to generate steering signals that steer the antenna toward the satellite.

9. The system of claim 8 wherein the antenna interface unit comprises:

a downconverter for downconverting the RF signals received from the antenna and for outputting the downconverted RF signals to the receiver/decoder;

a servo controller coupled between the RS485 interface of the antenna controller and the antenna for processing antenna position signals to generate elevation motor drive signals that are supplied to the antenna, and for outputting azimuth control signals;

a servo power amplifier coupled between the servo controller and the antenna for supplying power to the antenna, and for processing motor position control signals derived from the antenna and the azimuth control signals derived from the servo controller to generate azimuth motor drive signals that are supplied to the antenna.

10. The system of claim 6 wherein the receiver/decoder comprises:

a passive mother board having first and second computer busses;

a receiver/decoder card coupled to the first computer bus that decodes video signals corresponding to the single television channel;

a computer processor coupled to the first computer bus; and

a flash disk card coupled to the second bus for storing video, audio and control signals.

11. A satellite television system that provides live television programming to passengers on an aircraft derived from direct broadcast satellites, said system comprising:

a video and audio distribution system disposed on the aircraft for distributing video signals to the passengers on the aircraft;

an antenna that comprises steering means for steering the antenna toward the satellite in response to control signals supplied thereto;

antenna control means comprising;

an antenna interface unit coupled to the antenna for downconverting RF signals to provide left hand and right hand circularly polarized RF signals that contain different sets of television channels; and

an antenna controller comprising a controller, an RS485 interface coupled between the controller and the antenna interface unit for coupling control signals to the antenna and for processing status signals derived from the antenna to steer the antenna so that it is locked onto RF signals transmitted by the satellite, and an ARINC 429 interface coupled between the controller and a navigation system for coupling inertial reference signals provided by the navigation system to the controller which are used to generate steering signals that steer the antenna toward the satellite; and

a receiver/decoder coupled to the antenna interface unit for processing the downconverted RF signals to provide video signals corresponding to the plurality of television channels, and for feeding back the status signals to the antenna controller which are used to steer the antenna to lock it onto the RF signals received from the satellite, and for outputting the video signals to the video and audio distribution system which distributes live television programming to the passengers.

12. The system of claim 11 wherein the antenna interface unit comprises:

a downconverter for downconverting the RF signals received from the antenna and for outputting the downconverted RF signals to the receiver/decoder;

a servo controller coupled between the RS485 interface of the antenna controller and the antenna for processing antenna position signals to generate elevation motor drive signals that are supplied to the antenna, and for outputting azimuth control signals;

a servo power amplifier coupled between the servo controller and the antenna for supplying power to the antenna, and for processing motor position control signals derived from the antenna and the azimuth control signals derived from the servo controller to generate azimuth motor drive signals that are supplied to the antenna.

13. A satellite television system that provides a single channel of live television programming to overhead monitors mounted throughout an aircraft derived from direct broadcast satellites, said system comprising:

a video and audio distribution system disposed on the aircraft for distributing video signals to the passengers on the aircraft on overhead monitors mounted throughout the aircraft;

an antenna that is disposed adjacent a surface of the aircraft and that comprises steering means for steering the antenna toward the satellite in response to control signals supplied thereto;

antenna control means comprising;

an antenna interface unit coupled to the antenna for downconverting RF signals to provide left hand and right hand circularly polarized RF signals that contain different sets of television channels; and

an antenna controller comprising a controller, an RS485 interface coupled between the controller and the antenna interface unit for coupling control signals to the antenna and for processing status signals derived from the antenna to steer the antenna so that it is locked onto RF signals transmitted by the satellite, and an ARINC 429 interface coupled between the controller and a navigation system for coupling inertial reference signals provided by the navigation system to the controller which are used to generate steering signals that steer the antenna toward the satellite; and

a receiver/decoder coupled to the antenna interface unit for processing the downconverted RF signals to provide video signals corresponding to the plurality of television channels, and for feeding back the status signals to the antenna controller which are used to steer the antenna to lock it onto the RF signals received from the satellite, and for outputting the video signals corresponding to a single television channel to the video and audio distribution system which distributes live television programming corresponding to the single television channel to the overhead monitors mounted throughout the aircraft.

14. The system of claim 13 wherein the antenna interface unit comprises:

a downconverter for downconverting the RF signals received from the antenna and for outputting the downconverted RF signals to the receiver/decoder;

a servo controller coupled between the RS485 interface of the antenna controller and the antenna for processing antenna position signals to generate elevation motor drive signals that are supplied to the antenna, and for outputting azimuth control signals;

a servo power amplifier coupled between the servo controller and the antenna for supplying power to the antenna, and for processing motor position control signals derived from the antenna and the azimuth control signals derived from the servo controller to generate azimuth motor drive signals that are supplied to the antenna.