Satellite communications systems and methods with distributed and/or centralized architecture including ground-based beam forming

• US 20060205347A1
• Filed: 03/13/2006
• Published: 09/14/2006
• Est. Priority Date: 03/14/2005
• Status: Active Grant

• Current Assignee: ATC Technology Corporation (FedEx Corporation)
• Original Assignee: ATC Technology Corporation (FedEx Corporation)
• Inventors: Karabinis, Peter D.
• Granted Patent: US 7,627,285 B2
• Time in Patent Office: Days
• US Class Current: 455/12.100
• CPC Class Codes: H04B 7/18563 Arrangements for interconnecting multiple systems data switching networks H04L12/00
• CPC Class Codes: H04B 7/2041 Spot beam multiple access

Abstract

A space-based component (SBC) of a communications system includes a service link subsystem including a plurality of service link antenna elements configured to provide service links with radioterminals and a feeder link subsystem configured to provide respective feeder links to/from respective processing facilities. The SBC further includes a channelizer configured to map different spectral components of a signal received at the SBC via a service link antenna element to different feeder links.

Claims

1. A space-based component (SBC) of a communications system, the SBC comprising:

a plurality of service link antenna elements configured to transmit/receive information to/from radioterminals;

a plurality of feeder links each providing information to/from a respective processing facility; and

a channelizer configured to map different spectral components of a service link signal received at the SBC via a service link antenna element to different feeder links of the plurality of feeder links and/or to map different spectral components of a feeder link signal received at the SBC via a feeder link to different service link antenna elements.

2. The SBC of claim 1, wherein the channelizer is further configured to map different polarization components of a service link signal received at the SBC to different polarization components of a feeder link.

3. The SBC of claim 1, wherein at least some of the feeder links reuse feeder link frequencies.

4. The SBC of claim 1, wherein the channelizer is further configured to frequency translate service link signal components routed between the service link antenna elements and the feeder links.

5. The SBC of claim 1, further comprising a feeder link subsystem configured to provide a plurality of spatially diverse antenna patterns for the plurality of feeder links.

6. The SBC of claim 1, wherein the plurality of service link antenna elements comprises a first group of service link antenna elements corresponding to a first service region of the SBC and a second group of service link antenna elements corresponding to a second service region of the SBC, and wherein the channelizer is configured to map different spectral components of a service link signal received at the SBC by a service link antenna element of the first group of service link antenna elements to different feeder links of a first group of feeder links and to map different spectral components of a service link signal received at the SBC by a service link antenna element of the second group of service link antenna elements to different feeder links of a second group of feeder links.

7. The SBC of claim 6, wherein the first and second service regions are substantially non-overlapping service regions served by respective first and second service providers.

8. The SBC of claim 7, wherein the channelizer is further configured to map different spectral components of a service link signal received at the SBC by a service link antenna element of the second group of service link antenna elements to different feeder links of the first group of feeder links.

9. The SBC of claim 8, wherein the first and second service providers are allocated first and second sets of frequencies, and wherein the first service provider uses at least one frequency of the second set of frequencies to provide service to at least a portion of the first service region.

10. The SBC of claim 9, wherein the first and second sets of frequencies are frequencies of a L-band and/or S-band.

11. A communications system comprising the SBC of claim 1 and a plurality of processing facilities.

12. The communications system of claim 11, further comprising an aggregation facility configured to receive return feeder link signals from the plurality of processing facilities and to combine elements of the received return feeder link signals to recover return service link signals therefrom.

13. The communications system of claim 11, further comprising a separation facility configured to separate an aggregate of forward link communications into components and to provide respective ones of the components to respective ones of the plurality of processing facilities for transmission to the SBC.

14. The communications system of claim 11, wherein the channelizer is configured to frequency translate service link signal components routed between the service link antenna elements and the feeder links, and wherein the plurality of processing facilities are configured to perform complementary frequency translations.

15. A processing facility for communicating with a space-based component (SBC) that uses a set of service link frequencies for radioterminal service link communications, the processing facility configured to provide a feeder link to the SBC that carries radioterminal communications for a subset of the set of service link frequencies.

16. The processing facility of claim 15, wherein the SBC frequency translates service link signal components routed between service link antenna elements and the feeder link and wherein the processing facility is configured to perform complementary frequency translations.

17. The processing facility of claim 15, wherein the SBC serves first and second service regions of respective first and second service providers and communicates radioterminal communications for the first and second service regions over a plurality of feeder links.

18. A processing facility for communicating with a space-based component (SBC) that uses a set of service link frequencies for radioterminal service link communications, the processing facility comprising a plurality of processing facilities configured to provide respective feeder links to the SBC that carry radioterminal communications for respective subsets of the set of service link frequencies.

19. The processing facility of claim 18, wherein at least some of the feeder links reuse feeder link frequencies.

20. The processing facility of claim 18, wherein the SBC frequency translates service link signal components routed between service link antenna elements and the feeder links and wherein the plurality of processing facilities is configured to perform complementary frequency translations.

21. The processing facility of claim 18, further comprising an aggregation facility configured to receive feeder link signals from the plurality of ground stations, to combine elements of the feeder link signals and to recover radioterminal return service link signals therefrom.

22. The processing facility of claim 18, further comprising a separation facility configured to separate an aggregate of forward link communications into components and to provide respective ones of the components to respective ones of the plurality of processing facilities for transmission to the SBC.

23. The processing facility of claim 18, wherein the feeder links use spatially diverse antenna patterns.

24. A method of operating a communications system, the method comprising:

mapping different spectral components of a service link signal received at a space-based component (SBC) of the communications system via a service link antenna element of the SBC to different feeder links between the SBC and respective processing facilities.

25. The method of claim 24, comprising frequency translating service link signal components routed between service link antenna elements and feeder links.

26. The method of claim 24, comprising using respective spatially diverse antenna patterns for respective feeder links.

27. The method of claim 24, wherein at least some feeder links reuse feeder link frequencies.

28. The method of claim 24, wherein mapping different spectral components of a service link signal received at a space-based component (SBC) of the communications system via a service link antenna element of the SBC to different feeder links between the SBC and respective processing facilities comprises mapping different spectral components of a service link signal received at the SBC via a service link antenna element to different feeder links and/or mapping different spectral components of a feeder link signal received at the SBC via a feeder link to different service link antenna elements.

29. The method of claim 24, wherein the SBC comprises a plurality of service link antenna elements comprising a first group of service link antenna elements corresponding to a first service region and a second group of service link antenna elements corresponding to a second service region, and wherein mapping different spectral components of a service link signal received at a space-based component (SBC) of the communications system via a service link antenna element of the SBC to different feeder links between the SBC and respective processing facilities comprises mapping different spectral components of a service link signal received at a service link antenna element of the first group of service link antenna elements to different feeder links of a first group of the feeder links and mapping different spectral components of a service link signal received at a service link antenna element of the second group of service link antenna elements to different feeder links of a second group of the feeder links.

30. The method of claim 29, wherein the first and second service regions are substantially non-overlapping service regions served by respective first and second service providers.

31. The method of claim 29, further comprising mapping different spectral components of a service link signal received at the SBC by a service link antenna element of the second group of service link antenna elements to different feeder links of the first group of feeder links.

32. The method of claim 31, wherein the first and second service providers are allocated first and second sets of frequencies, and wherein the first service provider uses at least one frequency of the second set of frequencies to provide service to at least a portion of the first service region.

33. The method of claim 32, wherein the first and second sets of frequencies are frequencies of a L-band and/or S-band.

34. The method of claim 24, further comprising receiving return feeder link signals over a plurality of feeder links at a respective plurality of processing facilities and combining elements of the received return feeder link signals to recover return service link signals therefrom.

35. The method of claim 24, further comprising separating an aggregate of forward link communications into components and providing respective ones of the components to respective ones of processing facilities for transmission to the SBC.

36. The method of claim 24, further comprising frequency translating service link signal components routed between service link antenna elements and feeder links and performing a complementary frequency translation at processing facilities.

37. A method of operating a processing facility for communicating with a space-based component (SBC) that uses a set of service link frequencies for radioterminal service link communications, the method comprising:

providing a feeder link between the processing facility and the SBC that carries radioterminal communications for a subset of the set of service link frequencies.

38. The method of claim 37, wherein the SBC frequency translates service link signal components routed between service link antenna elements and the feeder link and wherein the method further comprises performing a complementary frequency translation at the processing facility.

39. The method of claim 37, wherein the SBC serves first and second service regions of respective first and second service providers.

40. A method of operating a processing facilities for communicating with a space-based component (SBC) that uses a set of service link frequencies for radioterminal service link communications, the method comprising:

providing respective feeder links from a plurality of processing facilities to the SBC that carry radioterminal communications for respective subsets of the set of service link frequencies.

41. The method of claim 40, wherein at least some of the feeder links reuse feeder link frequencies.

42. The method of claim 40, wherein the SBC frequency translates service link signal components routed between service link antenna elements and the feeder links and wherein the method comprises performing a complementary frequency translation at the plurality of processing facilities.

43. The method of claim 40, further comprising combining elements of feeder link signals from the plurality of processing facilities to recover radioterminal return service link signals therefrom.

44. The method of claim 40, further comprising separating an aggregate of forward link communications into components and providing respective ones of the components to respective ones of the plurality of processing facilities for transmission to the SBC.

45. The method of claim 40, wherein the feeder links use spatially diverse antenna patterns.