Inter-satellite crosslink communications system, apparatus, method and computer program product

• US 7,991,353 B2
• Filed: 08/15/2008
• Issued: 08/02/2011
• Est. Priority Date: 12/29/2003
• Status: Active Grant

• Current Assignee: Peersat LLC
• Original Assignee: Peersat LLC
• Inventors: Moore, Roscoe M. III
• Primary Examiner(s): LEE, JOHN J
• Application Number:
  US12/192,739
• Publication Number:
  US 20090053995A1
• Time in Patent Office: 1,082 Days
• Field of Search: 455/13.2, 455/431, 455/454, 455/13.3, 455/427, 455/428, 455/456.1, 455/13.1, 455/429, 455/430, 455/12.1, 455/457, 370/316, 370/390
• US Class Current: 455/13.2
• CPC Class Codes: H04B 7/18513 Transmission in a satellite or space-based system
• CPC Class Codes: H04B 7/18521 Systems of inter linked satellites, i.e. inter satellite service for optical links between satellites H04B10/118
• CPC Class Codes: H04B 7/18563 Arrangements for interconnecting multiple systems data switching networks H04L12/00

Abstract

A communications system, apparatus, method, and computer program product for inter-satellite and inter-spacecraft crosslinks (ISL) with non-ISL optimized antennas on spacecraft. The system includes a mobile communications platform that includes an ISL antenna configured to transmit information to a target satellite through a non-ISL antenna of the target satellite. The mobile communications platform is configured to relay transmissions through the non-ISL antenna of the target satellite to another communications platform. The mobile communications platform includes a controller configured to determine a location of the mobile platform; determine whether the target satellite is within communications range; and prepare a signal for relayed transmissions through a non-ISL antenna of the target satellite to another communications platform in a signal format that is decipherable by this other communications platform.

Claims

1. A communications system having at least one component in space, comprising:

a controller that enables communication between a mobile communications platform and a non-ISL antenna of another communications platform that is not configured to track a trajectory of the mobile communications platform, wherein

said controller is configured to

determine a location of the mobile communications platform,

determine whether the non-ISL antenna of the another communications platform is within communications range of the mobile communications platform,

identify a signaling format for a signal used for compatible reception at the non-ISL antenna of the another communications platform, and

adapt at least one of frequency, power, modulation, protocol, or data transfer rate between the mobile communications platform and the non-ISL antenna of the another communications platform for compatible communication with another communications platform.

2. The communications system of claim 1, wherein the controller adapts the communications system to lower interference with adjacent platforms.

3. The communications system of claim 1, wherein the controller is configured to determine in which particular zone the mobile communications platform is located of the non-ISL antenna of the another communications platform, and the particular zone includes a side-lobe, a main-lobe, or a narrow beam.

4. The communications system of claim 3, wherein the controller uses beamforming to create the particular zone, side-lobe, main-lobe, or narrow beam of the non-ISL antenna.

5. The communications system of claim 1, wherein the controller uses a tracking antenna or an inter-spacecraft link (ISL) antenna of the another communications platform to create a non-tracking non-ISL antenna for the another communications platform by not having the tracking antenna or the ISL antenna on the another communications platform move to track the mobile communications platform, and

the controller adapts at least one of frequency, power, modulation, protocol, or data transfer rate between the mobile communications platform and the tracking antenna or the ISL antenna of the another communications platform.

6. The communications system of claim 5, wherein the controller causes the tracking antenna or the ISL antenna of the another communications platform to use beamforming to track its targets other than the mobile communication platform.

7. The communications system of claim 1, wherein the non-ISL antenna is in space and the another communications platform is in a different location.

8. The method of claim 1, wherein the non-ISL antenna of the another communications platform is within Earth'"'"'s atmosphere.

9. The communication system of claim 8, wherein the controller adapts the communication system to lower interference with other platforms.

10. A communications system having at least one component with the potential energy to go into space, comprising:

a mobile communications platform communicating with another communications platform through a non-ISL antenna of the another communications platform that is not configured to track a trajectory of the mobile communications platform; and

a controller that adapts at least one of frequency, power, modulation, protocol, or a data transfer rate for communication between the mobile communications platform and the another communications platform,

wherein the controller determines if the mobile communications platform is located within a particular zone for communications with a non-ISL antenna of the another communications platform, and the zone includes a side-lobe, a main-lobe, or a narrow beam.

11. The communications system of claim 10, wherein the controller is configured to:

access information for another zone, side lobe, main lobe, or narrow beam from a look up table before or as the mobile communication platform enters the another zone, side lobe, main lobe, or narrow beam to determine whether the another zone, side lobe, main lobe, or narrow beam is a next communications resource, and

if necessary, adapt for an additional time at least one of frequency, power, modulation, protocol, or a data transfer rate for compatible communication between the mobile communications platform and the another communications platform within the another zone, side lobe, main lobe, or narrow beam.

12. The communications system of claim 10, wherein

the controller determines the particular zone by determining what radio communication parameters, including signaling format, are associated with the non-ISL antenna of the another communications platform before the mobile communications platform enters a communication area of the non-ISL antenna of the another communications platform, identifying the non-ISL antenna of the another communications platform as being a next communication resource to communicate with, locating the non-ISL antenna of the another communications platform in a look-up table before attempting to establish a communications link with the non-ISL antenna of the another communications platform, accessing information in the look-up table for the particular zone into which the mobile communications platform moves for communicating with the non-ISL antenna of the another communications platform, and transmitting or receiving a signal while located in the particular zone before the mobile communications platform is no longer within the communications area of the non-ISL antenna of the another communications platform.

13. The communication system of claim 10, wherein the controller uses beamforming to create the particular zone, main lobe, side lobe, or narrow beam of the non-ISL antenna.

14. A communications system having at least one component with the potential energy to go into space, comprising:

a mobile communications platform communicating with another communications platform through a non-ISL antenna of the another communications platform that is not configured to track a trajectory of the mobile communications platform; and

a controller that adapts at least one of frequency, power, modulation, protocol, or a data transfer rate for communication between the mobile communications platform and the another communications platform,

wherein the controller is configured to determine a location of the mobile communications platform, to determine whether the non-ISL antenna of the another communications platform is within communications range, and to prepare a signal for transmission or reception through the non-ISL antenna of the another communications platform for compatible transmission or reception at the another communications platform.

15. The communication system of claim 14, wherein the controller adapts the communication system to lower interference with other platforms.

16. The communication system of claim 14, wherein the mobile communications platform, the another communications platform, or the non-ISL antenna are stationary or on a moving ground vehicle, aircraft, rocket or other platform within the Earth'"'"'s atmosphere and not intended to go into space.

24. The method of claim 14, further comprising adapting the communication system to lower interference with other platforms.

17. A method for using a software defined radio for a communications system between a mobile communications platform and a non-ISL antenna of another communications platform in which at least one component of the communications system is in space or has the potential energy to go into space, comprising steps of:

operating, with a controller, the software defined radio;

looking up signal formatted parameters for use in radio communications with the non-ISL antenna of the another communications platform before or as the mobile communications platform enters a communication area or zone of the non-ISL antenna of the another communications platform;

adapting the signal formatted parameters of the software defined radio so the mobile communications platform can communicate with the non-ISL antenna of the another communications platform; and

communicating using signal formatted parameters for communication between the mobile communications platform and the non-ISL antenna of the another communications platform.

18. The method system of claim 17, wherein the mobile communications platform is on a stationary or moving rocket or missile or platform within Earth'"'"'s atmosphere with the potential energy to go into space.

19. The method of claim 17, wherein the zone includes a side-lobe, a main-lobe, or a narrow beam.

20. The method of claim 17, further comprising:

accessing information for another zone, side lobe, main lobe, or narrow beam from a look up table before or as the mobile communication platform enters the another zone, side lobe, main lobe, or narrow beam to determine whether the another zone, side lobe, main lobe, or narrow beam is a next communications resource, and

if necessary, adapting for an additional time at least one of frequency, power, modulation, protocol, or a data transfer rate for compatible communication between the mobile communications platform and the another communications platform within the another zone, side lobe, main lobe, or narrow beam.

21. The method of claim 17, wherein the non-ISL antenna and the another communications platform are within the Earth'"'"'s Atmosphere and not intended to go in space.

22. The method of claim 21, further comprising adapting the communication system to lower interference with other platforms.

23. The method of claim 17, further comprising using beamforming to create a communications area or zone of the non-ISL antenna.