Satellite communication system employing a combination of time slots and orthogonal codes

• US 20070155318A1
• Filed: 06/05/2006
• Published: 07/05/2007
• Est. Priority Date: 01/04/2006
• Status: Abandoned Application

• Current Assignee: Globalstar Incorporated
• Original Assignee: Globalstar Incorporated
• Inventors: Gallagher, Vijaya, Monte, Paul
• Application Number:
  US11/446,863
• Publication Number:
  US 20070155318A1
• Time in Patent Office: Days
• US Class Current: 455/12.100
• CPC Class Codes: H04B 7/195 Non-synchronous stations
• CPC Class Codes: H04L 12/66 Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
• CPC Class Codes: H04W 88/16 Gateway arrangements

Abstract

A satellite communication system is disclosed which provides multiple beams and employs a plurality of user terminals (UT) and at least one gateway connected to a PSTN which communicates with at least one UT over the system wherein each of the UTs within a given frequency band is distinguished one from the other employing a combination of time slots and orthogonal codes.

Claims

1. A satellite communication system comprising:

at least one satellite wherein each satellite provides multiple beams;

a plurality of UTs; and

at least one gateway connected to a PSTN and communicating with said at least one UT over the satellite communication system wherein each of said UTs within a given frequency band is distinguished from another of said UTs employing a combination of time slots and orthogonal codes.

2. A satellite communication system as defined in claim 1 wherein said combination of time slots and orthogonal codes is implemented in a forward and return link.

3. A satellite communication system as defined in claim 2 wherein said forward link comprises orthogonal codes and said return link comprises a combination of time slots and phase shift of one or more pseudo-random codes.

4. A satellite communication system as defined in claim 1 wherein said satellite communication system comprises a LEO satellite constellation.

5. A satellite communication system as defined in claim 1 wherein said satellite communication system comprises a MEO satellite constellation.

6. A satellite communication system as defined in claim 1 wherein said satellite communication system comprises a GEO satellite constellation.

7. A satellite communication system as defined in claim 4 wherein said combination of time slots and orthogonal codes is implemented in a forward and return link.

8. The constellation as defined in claim 4 wherein said forward link comprises orthogonal codes and said return link comprises a combination of time slots and phase shift of one or more pseudo-random codes.

9. The constellation as defined in claim 5 wherein said combination of time slots and orthogonal codes is implemented in a forward and return link.

10. The constellation as defined in claim 5 wherein said forward link comprises orthogonal codes and said return link comprises a combination of time slots and phase shift of one or more pseudo-random codes.

11. The constellation as defined in claim 7 wherein said combination of time slots and orthogonal codes is implemented in a forward and return link.

12. A satellite communication system as defined in claim 8 wherein said forward link comprises orthogonal codes and said return link comprises a combination of time slots and phase shift of one or more pseudo-random codes.