System and method of communicating and re-using frequencies within terrestrial and satellite signal paths

• US 20080293359A1
• Filed: 05/21/2007
• Published: 11/27/2008
• Est. Priority Date: 05/21/2007
• Status: Abandoned Application

• Current Assignee: Delphi Technologies, Inc. (BorgWarner Incorporated)
• Original Assignee: Delphi Technologies, Inc. (BorgWarner Incorporated)
• Inventors: Walker, Glenn A., Fruit, Larry J.
• Application Number:
  US11/804,961
• Publication Number:
  US 20080293359A1
• Time in Patent Office: Days
• US Class Current: 455/13.3
• CPC Class Codes: H04B 7/18515 Transmission equipment in satellites or space-based relays
• CPC Class Codes: H04B 7/18523 Satellite systems for providing broadcast service to terrestrial stations, i.e. broadcast satellite service arrangements specially adapted for satellite broadcast receiving H04H40/90; picture transmission via satellite H04N1/00103; television transmission via satellite H04N7/20

Abstract

A system and method for communicating and re-using frequencies is provided, which includes a source provider, at least one transmitter, and a plurality of antennas. The transmitter transmits source data along a plurality of signal paths including a first signal at a first frequency transmitted along a first satellite signal path, a second signal at a second frequency transmitted along a second satellite signal path, and a terrestrial signal transmitted along a terrestrial signal path. The terrestrial signal frequency is substantially the same as one of the first and second signal frequencies. The antennas receive signals, and include a first antenna for receiving at least the terrestrial signal along the terrestrial signal path and a second antenna for receiving at least the first signal along the first satellite signal path, the second signal along the second satellite signal path, and the terrestrial signal along the terrestrial signal path.

Claims

1. A communication system for re-using frequencies comprising:

a source provider that provides source data;

at least one transmitter, wherein said source data is transmitted by said at least one transmitter along a plurality of signal paths including at least a first signal at a first frequency transmitted along a first satellite signal path, a second signal at a second frequency transmitted along a second satellite signal path, and a terrestrial signal transmitted along a terrestrial signal path, wherein a frequency of said terrestrial signal along said terrestrial signal path is substantially the same as one of said first and second signal frequencies along one of said first and second satellite signal paths; and

a plurality of antennas that receive signals from said plurality of signal paths including at least a first antenna for receiving at least said terrestrial signal along said terrestrial signal path and a second antenna for receiving at least one of said first signal along said first satellite signal path, said second signal along said second satellite signal path, and said terrestrial signal from said terrestrial signal path.

2. The system of claim 1, wherein said terrestrial signal frequency is substantially the same as one of said first signal frequency transmitted along said first satellite signal path that is associated with a first satellite and said second signal frequency transmitted along said second satellite signal path that is associated with a second satellite based upon which of said first and second satellites have the lowest elevation angle with respect to said first and second antennas.

3. The system of claim 2 further comprising at least one receiver that comprises said first and second antennas, wherein said at least one receiver emits an output based upon said signal received from said terrestrial signal path when said at least one receiver is in a strong terrestrial area.

4. They system of claim 1 further comprising at least one receiver that comprises at least one of said first and second antenna, wherein said at least one receiver emits an output based upon said signals received from said first and second satellite signal paths when said at least one receiver is in a weak terrestrial area.

5. The system of claim 1 further comprising at least one receiver that comprises at least one of said first and second antenna, wherein said at least one receiver emits an output based upon said signals received from said terrestrial signal path and one of said first and second satellite signal paths when said at least one receiver is in an intermediate terrestrial area.

6. The system of claim 1, wherein said first antenna is a low-elevation antenna and said second antenna is a high-elevation antenna.

7. The system of claim 1, wherein said first and second satellites are highly elliptical orbit satellites.

8. A method of communicating and re-using frequencies, said method comprising the steps of:

obtaining source data;

transmitting said source data over a plurality of signal paths including at least a first signal at a first frequency transmitted along a first satellite signal path, a second signal at a second frequency transmitted along a second satellite signal path, and a terrestrial signal transmitted along a terrestrial signal path;

overlapping one of said first and second signals with said terrestrial signal, such that a frequency of said terrestrial signal along said terrestrial signal path is substantially the same as one of said first and second signal frequencies along one of said first and second satellite signal paths;

receiving at least said terrestrial signal along said terrestrial signal path by a first antenna;

receiving at least one of said first signal along said first satellite signal path, said second signal along said second satellite signal path, and said terrestrial signal along said terrestrial signal path by a second antenna; and

emitting an output based upon said received at least one signal.

9. The method of claim 8, wherein said terrestrial signal frequency is substantially the same as one of said first signal frequency transmitted along said first satellite signal path that is associated with a first satellite and said second signal frequency transmitted along said second satellite signal path that is associated with a second satellite based upon which of said first and second satellites have the lowest elevation angle with respect to said first and second antennas.

10. The method of claim 9 further comprising the step of emitting said output by a receiver based upon said signal received from said terrestrial signal path when said first and second antennas are in a strong terrestrial area.

11. The method of claim 8 further comprising the step of emitting said output by a receiver based upon said signals received from said first and second satellite signal paths when said first and second antennas are in a weak terrestrial area.

12. The method of claim 8 further comprising the step of emitting said output based upon said signals received from said terrestrial signal path and one of said first and second satellite signal paths when said first and second antennas are in an intermediate terrestrial area.

13. The method of claim 8, wherein said first antenna is a low-elevation antenna and said second antenna is a high-elevation antenna.

14. The method of claim 13 further comprising the step of rejecting said signals from said signal paths that are at high elevations by said low-elevation antenna, and rejecting said signals from said signal paths that are at low elevations by said high-elevation antenna.

15. The method of claim 8 further comprising the steps of:

modulating said source data before transmitting said modulated source data;

transmitting said modulated source data in a time diversity format over said plurality of signal paths;

demodulating said signals received by said first and second antennas;

time aligning said signals received by said first and second antennas; and

decoding said signals received by said first and second antennas.

16. The method of claim 8 further comprising the step of providing a first satellite associated with said first satellite signal path and a second satellite associated with said second satellite signal path, wherein said first and second satellites are highly elliptical orbit satellites.

17. A method of communicating and re-using frequencies, said method comprising the steps of:

obtaining source data;

transmitting said source data over a plurality of signal paths including at least a first signal at a first frequency transmitted along a first satellite signal path that is associated with a first satellite, a second signal at a second frequency transmitted along a second satellite signal path that is associated with a second satellite, and a terrestrial signal transmitted along a terrestrial signal path, wherein said first satellite and said second satellite are highly elliptical orbit satellites;

overlapping one of said first and second signals with said terrestrial signal based upon which of said first and second satellites have the lowest elevation angle, such that a frequency of said terrestrial signal along said terrestrial signal path is substantially the same as one of said first and second signal frequencies along one of said first and second satellite signal paths;

receiving at least said terrestrial signal along said terrestrial signal path by a low-elevation antenna;

receiving at least one of said first signal along said first satellite signal path, said second signal along said second satellite signal path, and said terrestrial signal along said terrestrial signal path by a high-elevation antenna; and

emitting an output based upon said received at least one signal.

18. The method of claim 17 further comprising the step of emitting said output based upon said signals received from said signal path of said terrestrial signal path when said first and second antennas are in a strong terrestrial area.

19. The method of claim 17 further comprising the step of emitting said output based upon said signals received from said first and second satellite signal paths when said first and second antennas are in a weak terrestrial area.

20. The method of claim 17 further comprising the step of emitting said output based upon said signals received from said terrestrial signal path and one of said first and second satellite signal paths when said first and second antennas are in an intermediate terrestrial area.