Supplemental satellite communication processing

• US 6,545,998 B1
• Filed: 03/04/1999
• Issued: 04/08/2003
• Est. Priority Date: 03/04/1999
• Status: Expired due to Term

• Current Assignee: Northrop Grumman Systems Corporation (Northrop Grumman Corporation)
• Original Assignee: TRW Limited (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Inventors: Saunders, Oliver W.
• Primary Examiner(s): Trost, William
• Assistant Examiner(s): Ferguson, Keith
• Application Number:
  US09/262,424
• Time in Patent Office: 1,496 Days
• Field of Search: 370/347, 370/315, 370/316, 370/325, 455/12.1, 455/11.1, 455/13.1, 455/13.3, 455/427, 455/428, 455/445, 455/430, 455/517, 455/550, 342/353, 342/357.01, 342/357.16
• US Class Current: 370/347
• CPC Class Codes: H04B 7/18521 Systems of inter linked satellites, i.e. inter satellite service for optical links between satellites H04B10/118

Abstract

Apparatus for enhancing the processing capabilities of a satellite communication system including an uplink receiver 40 deployable with a first satellite 20. A first processor 50 deployable on satellite 20 is capable of processing signals from uplink receiver 40. A link terminal 60 deployable with satellite 20 is capable of receiving signals processed by a second processor from a second intersatellite communication link terminal deployable with a second satellite. A first switch 100 deployable with satellite 20 enables signals from uplink receiver 40 to be utilized by communication link terminal 60 or processor 50. A downlink transmitter 80 deployable with satellite 20 is capable of transmitting signals to a ground based communication station 90. A second switch 110 deployable with satellite 20 enables signals from communication link terminal 60 or first processor 50 to be utilized by downlink transmitter 80.

Claims

1. In a satellite communication system, improved apparatus for enhancing the processing capabilities of said system comprising in combination:

an uplink receiver deployable with a first satellite suitable for launching into an orbital slot and capable of receiving communication signals from a ground-based communication station;

a first processor deployable with said first satellite and capable of processing signals from said uplink receiver;

a first intersatellite communication link terminal deployable with said first satellite and capable of transmitting signals to a second processor deployable with a second satellite launched after said first satellite and capable of receiving signals processed by said second processor from a second intersatellite communication link terminal deployable with said second satellite;

a first switch deployable with said first satellite and enabling signals from said uplink receiver to be utilized by said first intersatellite communication link terminal or said first processor;

a downlink transmitter deployable with said first satellite capable of transmitting said signals to a ground-based communication station; and

a second switch deployable with said first satellite and enabling signals from said first intersatellite communication link terminal or said first processor to be utilized by said downlink transmitter, whereby the processing capabilities of said first satellite can be enhanced by launching said second satellite after said first satellite is in said first orbital slot.

2. Apparatus, as claimed in claim 1, wherein said first and second switches initiate switching in response to information in at least one of said signals.

3. Apparatus, as claimed in claim 1, wherein said second satellite is capable of being launched into said orbital slot, whereby the processing supported at said orbital slot may be enhanced.

4. Apparatus, as claimed in claim 3, wherein said first intersatellite communication link terminal comprises a portion of a two way intersatellite link with sufficient range to enable communication between said first and second satellites and sufficient capacity to enable the processing and transmission of said signals within said orbital slot.

5. Apparatus, as claimed in claim 1, wherein said uplink receiver comprises an antenna and apparatus capable of converting from carrier frequency to intermediate frequency.

6. Apparatus, as claimed in claim 1, wherein said first processor comprises a bent pipe repeater capable of shifting the frequency of said signals received by said uplink receiver to a downlink frequency.

7. Apparatus, as claimed in claim 6, wherein said first and second switches initiate switching in response to information in at least one of said signals.

8. In a satellite communication system, improved apparatus for enhancing the processing capabilities of said system comprising in combination:

an uplink receiver deployable with a first satellite suitable for launching into an orbital slot capable of receiving communication signals from a ground-based communication station;

a first processor deployable with said first satellite and capable of processing signals from said uplink receiver;

a first intersatellite communication link terminal deployable with said first satellite and capable of transmitting signals within said orbital slot;

a second processor deployable with a second satellite launched after said first satellite into said orbital slot and capable of processing signals transmitted by said first intersatellite communication link terminal;

a second intersatellite communication link terminal deployable with said second satellite and capable of transmitting signals processed by said second processor to said first intersatellite communication link terminal;

a first switch deployable with said first satellite and enabling signals from said uplink receiver to be utilized by said first intersatellite communication link terminal or said first processor;

a downlink transmitter deployable with said first satellite and capable of transmitting signals to a ground-based communication station; and

a second switch deployable with said first satellite and enabling signals from said first intersatellite communication link terminal or said first processor to be utilized by said downlink transmitter, whereby the processing capabilities of said first satellite can be enhanced by launching said second satellite after said first satellite is in said first orbital slot.

9. Apparatus, as claimed in claim 8, wherein said uplink receiver comprises an antenna and apparatus capable of converting the frequency of said signals received by said uplink receiver from carrier frequency to intermediate frequency.

10. Apparatus, as claimed in claim 8, wherein said first processor comprises a bent pipe repeater capable of shifting the frequency of said signals received by said uplink receiver to a downlink frequency.

11. Apparatus, as claimed in claim 8, wherein said first and second intersatellite communication link terminals comprise a two way intersatellite link with sufficient range to enable communication between said first and second satellites and sufficient capacity to enable the processing and transmission of said signals within said orbital slot.

12. In a satellite communication system, improved apparatus for enhancing the processing capabilities of said system comprising in combination:

uplink receiver means deployable with a first satellite suitable for launching into an orbital slot, said uplink receiver means being for receiving communication signals from a ground-based communication station;

first processor means deployable with said first satellite for processing said signals from said uplink receiver means;

first intersatellite communication link terminal means deployable with said first satellite for transmitting said signals to a second processor deployable with a second satellite launched after said first satellite and for receiving said signals processed by said second processor from a second intersatellite communication link terminal deployable with said second satellite;

first means deployable with said first satellite for enabling signals from said uplink receiver means to be utilized by said first intersatellite communication link terminal means or said first processor means;

downlink transmitter means deployable with said first satellite for transmitting said signals to a ground-based communication station; and

second means deployable with said first satellite for enabling signals from said first intersatellite communication link terminal means or said first processor means to be utilized by said downlink transmitter means, whereby the processing capabilities of said first satellite can be enhanced by launching said second satellite after said first satellite is in said orbital slot.

13. Apparatus, as claimed in claim 12, wherein said first and second means for enabling comprise means for initiating switching in response to information in said signals.

14. Apparatus, as claimed in claim 12, wherein said second satellite is capable of being launched into said orbital slot, whereby the processing supported at said orbital slot may be enhanced.

15. Apparatus, as claimed in claim 14, wherein said first intersatellite communication link terminal means comprises a portion of two way intersatellite link means with sufficient range for enabling communication between said first and second satellites and with sufficient capacity for enabling the processing and transmission of said signals within said orbital slot.

16. Apparatus, as claimed in claim 12, wherein said uplink receiver means comprises an antenna and means for converting from carrier frequency to intermediate frequency.

17. Apparatus, as claimed in claim 12, wherein said first processor means comprises bent pipe repeater means for shifting the frequency of said signals to a downlink frequency.

18. In a satellite communication system, improved apparatus for enhancing the processing capabilities of said system comprising in combination:

uplink receiver means deployable with a first satellite suitable for launching into an orbital slot, said uplink receiver means being for receiving communication signals from a ground-based communication station;

first processor means deployable with said first satellite for processing said signals from said uplink receiver means;

first intersatellite communication link terminal means deployable with said first satellite for transmitting said signals;

second processor means deployable with a second satellite launched after said first satellite into said orbital slot for processing said signals transmitted by said first intersatellite communication link terminal means;

second intersatellite communication link terminal means deployable with said second satellite for transmitting signals processed by said second processor means to said first intersatellite communication link terminal means;

first means deployable with said first satellite for enabling signals from said uplink receiver means to be utilized by said first intersatellite communication link terminal means or said first processor means;

downlink transmitter means deployable with said first satellite for transmitting said signals to a ground-based communication station; and

second means deployable with said first satellite for enabling signals from said first intersatellite communication link terminal means or said first processor means to be utilized by said downlink transmitter means, whereby the processing capabilities of said first satellite can be enhanced by launching said second satellite after said first satellite is in said first orbital slot.

19. Apparatus, as claimed in claim 18, wherein said first and second means for enabling comprise means for initiating switching in response to information in said signals.

20. Apparatus, as claimed in claim 18, wherein said uplink receiver means comprises an antenna and means for converting from carrier frequency to intermediate frequency.

21. Apparatus, as claimed in claim 18, wherein said first processor means comprises bent pipe repeater means for shifting the frequency of said signals to a downlink frequency.

22. Apparatus, as claimed in claim 18, wherein said first and second intersatellite communication link terminal means comprise two way intersatellite link means with sufficient range for enabling communication between said first and second satellites and sufficient capacity for enabling the processing and transmission of said signals within said orbital slot.

23. In a satellite communication system comprising an uplink receiver deployable with a first satellite, a downlink transmitter deployable with said first satellite, a first processor deployable with said first satellite, and a first intersatellite communication link terminal deployable with said first satellite, an improved method of enhancing the processing capability of the system comprising in combination the steps of:

receiving communication signals at said uplink receiver;

enabling signals received at said uplink receiver to be utilized by said first processor or said first intersatellite communication link terminal;

receiving from a remote location communication signals at said first intersatellite communication link terminal;

enabling signals from said first intersatellite communication link terminal or from said first processor to be utilized by said downlink transmitter, whereby said signals may be processed by said first processor on said first satellite or transmitted to a second satellite by said first intersatellite communication link terminal for processing by a second processor deployed with said second satellite so that the processing capabilities of said first satellite may be enhanced.

24. A method, as claimed in claim 23, wherein said step of enabling signals received at said uplink receiver comprises the step of enabling in response to information in at least one of said signals.

25. A method, as claimed in claim 24, wherein said step of enabling said signals from said first intersatellite communication link terminal comprises the step of enabling in response to information in at least one of said signals.

26. A method, as claimed in claim 23, wherein said signals received at said uplink receiver have a carrier frequency and wherein said step of receiving communication signals at said uplink receiver comprises the step of converting said carrier frequency to an intermediate frequency.

27. A method, as claimed in claim 23, and further comprising the step of performing bent pipe repeater processing in said processor.

28. A method, as claimed in claim 23, wherein said satellite communication system further comprises a second intersatellite communication link terminal deployable with a second satellite and a second processor deployable with said second satellite and wherein said method further comprising the steps of:

transmitting said signals from said first intersatellite communication link terminal to said second intersatellite communication link terminal;

processing said communication signals in said second processor; and

transmitting said signals processed by said second processor from said second intersatellite communication link terminal to said first intersatellite communication link terminal.