System and method for a broadcast recovery carrier channel for static and dynamic carrier systems

• US 9,088,346 B2
• Filed: 02/12/2014
• Issued: 07/21/2015
• Est. Priority Date: 06/30/2010
• Status: Active Grant

• Current Assignee: Comtech Satellite Network Technologies, Inc. (Comtech Telecommunications Corporation)
• Original Assignee: Comtech EF Data (Comtech Telecommunications Corporation)
• Inventors: Beeler, Michael, Davis, Wallace, Remillong, Randall, McCollum, Jason
• Primary Examiner(s): Washburn, Daniel
• Assistant Examiner(s): Tadese, Berhanu
• Application Number:
  US14/179,352
• Publication Number:
  US 20140161155A1
• Time in Patent Office: 524 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04B 1/707 using direct sequence modulation
• CPC Class Codes: H04B 7/18515 Transmission equipment in satellites or space-based relays

Abstract

A method of providing a recovery channel for a common transmission network of remote devices comprising encoding data that contains information about a primary carrier signal, modulating the encoded information, spreading, the modulated encoded information such that a secondary carrier signal results, combining, the spread secondary carrier with the primary carrier signal such that the spread secondary carrier signal occupies at least a portion of a bandwidth of the bandwidth pool, transmitting the combined primary and secondary carrier signals across a communications link having a plurality of remote carrier signals also being transmitted across the communications link to a remote receiver and sharing a same bandwidth pool (or multiple bandwidth pools), and reestablishing the communications link with the primary carrier signal after a loss of the communications link using the information about the primary carrier signal contained in the secondary carrier signal to recover one or more network configuration parameters.

Claims

1. A method of providing a recovery channel for a common transmission network of remote devices comprising:

encoding data that contains information about a primary carrier signal using an encoder;

modulating the encoded information using a modulator;

spreading, using a spreader, the modulated encoded information such that a secondary carrier signal results;

combining, using an embedding device, the spread secondary carrier with the primary carrier signal such that the spread secondary carrier signal occupies at least a portion of a bandwidth of the primary carrier signal;

transmitting the combined primary and secondary carrier signals across a communications link having a plurality of remote carrier signals also being transmitted across the communications link to a remote receiver and sharing a same bandwidth pool as the primary and secondary carrier signals, wherein the secondary carrier signal is independent of use of a spectrum across the communications link by the primary carrier signal or plurality of remote carrier signals; and

reestablishing the communications link with the primary carrier signal after a loss of the communications link between the transmitter of the primary carrier signal and the remote receiver using the information about the primary carrier signal contained in the secondary carrier signal to recover one or more network configuration parameters.

2. The method of claim 1, wherein the information about the primary carrier signal comprises a current or future center frequency of the primary carrier signal.

3. The method of claim 1, wherein the information about the primary carrier signal comprises a current or future symbol rate of the primary carrier signal.

4. The method of claim 1, wherein the information about the primary carrier signal comprises a current or future modulation format of the primary carrier signal.

5. The method of claim 1, wherein the information about the primary carrier signal comprises a current or future forward error correction format of the primary carrier signal.

6. The method of claim 1, wherein the information about the primary carrier signal comprises information relating to a current or future scrambling of the primary carrier signal.

7. The method of claim 1, wherein the information about the primary carrier signal comprises a current or future power level of the primary carrier signal.

8. The method of claim 1, wherein the information about the primary carrier signal comprises a current or future polarization of the primary carrier signal.

9. The method of claim 1, wherein the information about the primary carrier signal comprises a current or future repeating relay of the primary carrier signal.

10. The method of claim 1, further comprising modulating the primary carrier signal and secondary carrier signal using a same modulator.

11. The method of claim 1, further comprising modulating the primary carrier signal using a different modulator than the modulator that modulates the secondary carrier signal.

12. The method of claim 11, wherein the modulator that modulates the secondary carrier signal is located at a location other than a transmission site of the primary carrier signal.

13. The method of claim 1, wherein the modulator that modulates the secondary carrier signal is located at a repeating relay.

14. The method of claim 1, wherein the loss of the communications link is due to a movement of the primary carrier signal from a first repeating relay to a second repeating relay.

15. The method of claim 1, wherein the loss of the communications link is due to a failure in transmission of the primary carrier signal.

16. The method of claim 1, wherein the loss of the communications link is due to interference caused by an additional carrier signal.

17. The method of claim 1, wherein the loss of the communications link is due to a movement of the bandwidth pool to a new spectral location.

18. The method of claim 1, wherein the remote receiver reestablishes the communications link using the information about the primary carrier signal that is contained in the secondary carrier signal.

19. The method of claim 18, further comprising:

despreading the secondary carrier signal using a secondary carrier despreader;

demodulating the secondary carrier signal using a secondary carrier demodulator; and

decoding the secondary carrier signal using a secondary carrier decoder.

20. The method of claim 18, further comprising processing for formatting and error checking, by a secondary carrier signal processor, the secondary carrier signal prior to passing the primary carrier signal to an input of a primary carrier signal receiver.

21. The method of claim 1, wherein the secondary carrier signal occupies a single bandwidth pool.

22. The method of claim 1, wherein the secondary carrier signal occupies more than a single bandwidth pool.

23. A system for providing a recovery channel for a common transmission network of remote devices comprising:

an encoder configured to encode data that contains information about a primary carrier signal;

a modulator configured to modulate the encoded information;

a spreader configured to spread the modulated encoded information such that a secondary carrier signal results;

an embedding device configured to combine the spread secondary carrier signal with the primary carrier signal such that the spread secondary carrier signal occupies at least a portion of a bandwidth of the primary carrier signal; and

a transmitter configured to transmit the combined primary and secondary carrier signals across a communications link having a plurality of remote carrier signals also being transmitted across the communications link to a remote receiver and sharing a same bandwidth pool as the primary and secondary carrier signals, wherein the secondary carrier signal is independent of use of a spectrum across the communications link by the primary carrier signal or plurality of remote carrier signals;

wherein the remote receiver is configured to reestablish the communications link with the primary carrier signal after a loss of the communications link between the transmitter of the primary carrier signal and the remote receiver using the information about the primary carrier signal contained in the secondary carrier signal to recover one or more network configuration parameters.

24. The system of claim 23, wherein the information about the primary carrier signal comprises a current or future center frequency of the primary carrier signal.

25. The system of claim 23, wherein the information about the primary carrier signal comprises a current or future symbol rate of the primary carrier signal.

26. The system of claim 23, wherein the information about the primary carrier signal comprises a current or future modulation format of the primary carrier signal.

27. The system of claim 23, wherein the information about the primary carrier signal comprises a current or future forward error correction format of the primary carrier signal.

28. The system of claim 23, wherein the information about the primary carrier signal comprises information relating to a current or future scrambling of the primary carrier signal.

29. The system of claim 23, wherein the information about the primary carrier signal comprises a current or future power level of the primary carrier signal.

30. The system of claim 23, wherein the information about the primary carrier signal comprises a current or future polarization of the primary carrier signal.

31. The system of claim 23, wherein the information about the primary carrier signal comprises a current or future repeating relay of the primary carrier signal.

32. The system of claim 23, wherein the modulator is configured to modulate both the primary carrier signal and secondary carrier signal.

33. The system of claim 23, further comprising a separate secondary modulator that is configured to modulate the secondary carrier signal separately from the modulator that is configured to modulate the primary carrier signal.

34. The system of claim 33, wherein the modulator that modulates the secondary carrier signal is located at a location other than a transmission site of the primary carrier signal.

35. The system of claim 23, wherein the modulator that modulates the secondary carrier signal is located at a repeating relay.

36. The system of claim 23, wherein the loss of the communications link is due to a movement of the primary carrier signal from a first repeating relay to a second repeating relay.

37. The system of claim 23, wherein the loss of the communications link is due to a failure in transmission of the primary carrier signal.

38. The system of claim 23, wherein the loss of the communications link is due to interference caused by an additional carrier signal.

39. The system of claim 23, wherein the loss of the communications link is due to a movement of the bandwidth pool to a new spectral location.

40. The system of claim 23, wherein the remote receiver further comprises:

a secondary carrier despreader configured to despread the secondary carrier signal;

a secondary carrier demodulator configured to demodulate the secondary carrier signal; and

a secondary carrier decoder configured to decode the secondary carrier signal.

41. The system of claim 40, further comprising a secondary carrier signal processor configured to process the secondary carrier signal for formatting and error checking prior to the primary carrier signal being passed to an input of a primary carrier signal receiver.

42. The system of claim 23, wherein the secondary carrier signal occupies a single bandwidth pool.

43. The system of claim 23, wherein the secondary carrier signal occupies more than a single bandwidth pool.