Method and system for mitigating co-channel interference

• US 20070010210A1
• Filed: 11/01/2005
• Published: 01/11/2007
• Est. Priority Date: 07/08/2005
• Status: Active Grant

• Current Assignee: Telcom Ventures LLC
• Original Assignee: Telcom Ventures LLC
• Inventors: Singh, Rajendra, Olexa, George
• Granted Patent: US 7,583,935 B2
• Time in Patent Office: Days
• US Class Current: 455/73
• CPC Class Codes: H04B 15/00 Suppression or limitation of noise or interference by means associated with receiver H04B1/10
• CPC Class Codes: H04B 7/18515 Transmission equipment in satellites or space-based relays
• CPC Class Codes: H04W 16/04 Traffic adaptive resource partitioning
• CPC Class Codes: H04W 16/12 Fixed resource partitioning

Abstract

A method of communicating data between a first transceiver and any of a plurality of second transceivers, wherein areas serviced by each of the plurality of second transceivers either overlap or are adjacent. The method comprises operating the first transceiver and the plurality of second transceivers in an overlapping frequency range. Each of the plurality of second transceivers operates in a time period different from a time period of another of the plurality of second transceivers.

Claims

1. A method of communicating data between a first transceiver and any of a plurality of second transceivers, wherein areas serviced by each of said plurality of second transceivers either overlap or are adjacent, comprising:

operating said first transceiver and said plurality of second transceivers in an overlapping frequency range, wherein each of said plurality of second transceivers operates in a time period different from a time period of another of said plurality of second transceivers, and wherein said first transceiver is configured to communicate data with any of the plurality of second transceivers.

2. The method according to claim 1, wherein said first transceiver is a receiver and said plurality of second transceivers are transmitters.

3. The method according to claim 1, wherein at least two transceivers in said plurality of second transceivers are terrestrial.

4. The method according to claim 1, wherein said plurality of second transceivers are terrestrial.

5. The method according to claim 1, further comprising controlling each one of said plurality of second transceivers and determining when each one of said plurality of second transceivers communicates with said first transceiver.

6. The method according to claim 5, wherein said plurality of second transceivers are controlled by a same control complex.

7. The method according to claim 1, wherein each one of said second transceivers and said first transceiver form a single network.

8. The method according to claim 1, further comprising commonly controlling communications through each one of said plurality of second transceivers.

9. The method according to claim 1, further comprising receiving communications from or sending communications to each one of said plurality of second transceivers at or from a common control complex.

10. The method according to claim 1, wherein said areas are serviced by said plurality of second transceivers by providing a plurality of data signals to said areas.

11. The method according to claim 10, wherein said plurality of data signals provided to said areas are identical.

12. The method according to claim 1, wherein the time period during which each of said plurality of second transceivers operates and the time period during which another of said plurality of second transceivers operates are separated by a guard time interval during which neither one operates.

13. The method according to claim 12, wherein said guard time interval is selected so that there is substantially no overlap between the time period during which each of said plurality of second transceivers operates and the time period during which another of said plurality of second transceivers operates.

14. The method according to claim 12, wherein said guard time interval is selected so as to minimize or substantially reduce interference between data signals transmitted or received by said first transceiver in said overlapping or adjacent areas.

15. The method according to claim 12, wherein the guard time interval comprises a maximum guard time interval corresponding to a maximum time delay a signal takes to propagate a distance between each of the plurality of second transceivers to corresponding serviced areas and a minimum guard time interval corresponding to hardware switch over time.

16. The method according to claim 1, wherein the first transceiver monitors signal strength of a received data signal from one of said plurality of second transceivers and compares the signal strength of the received data signal to strength of data signals received from surrounding areas serviced by remaining transceivers in said plurality of second transceivers.

17. The method according to claim 16, wherein the first transceiver locks on a strongest data signal.

18. The method according to claim 16, wherein the first transceiver integrates identical data signals received from each of the plurality of second transceivers.

19. The method according to claim 1, wherein each transceiver in said plurality of second transceivers monitors data signal strength of a received data signal from said first transceiver and compares the data signal strength of the received data signal to strength of signals received by remaining transceivers in said plurality of second transceivers from said first transceiver.

20. The method according to claim 19, wherein a transceiver in said plurality of second transceivers receiving the strongest data signal from the first transceiver takes on communication with said first transceiver.

21. The method according to claim 1, wherein one of said plurality of second transceivers is a satellite and said first transceiver is configured to receive a data signal from said satellite and from remaining transceivers in said plurality of second transceivers.

22. The method according to claim 21, wherein each one of said plurality of second transceivers including said satellite, and said first transceiver form a single network.

23. The method according to claim 21, wherein said remaining transceivers in said plurality of second transceivers are terrestrial and are configured to receive the data signal from said satellite.

24. The method according to claim 21, wherein the satellite is assigned a time period while the remaining transceivers in said plurality of transceivers are assigned remaining time periods.

25. The method according to claim 24, wherein each of the remaining transceivers synchronizes to the time period assigned to the satellite and generates its time period start time.

26. The method according to claim 25, wherein the remaining transceivers are timed based upon a data signal propagation time from the satellite to the ground.

27. The method according to claim 21, wherein the first transceiver locks on a strongest data signal among data signals transmitted by the satellite and the remaining transceivers.

28. The method according to claim 21, wherein the first transceiver integrates identical data signals received from the satellite and each of the remaining transceivers in the plurality of second transceivers.

29. A method of transmitting identical data signals from a plurality of transmitters, wherein areas serviced by each of said plurality of transmitters either overlap or are adjacent, comprising:

operating said plurality of transmitters in an overlapping frequency range, wherein each of said plurality of transmitters operates in a time period different from a time period of another of said plurality of transmitters, and wherein said plurality of transmitters are configured to transmit identical data signals.

30. The method according to claim 29, wherein the time period during which each of said plurality transmitters operates and the time period during which another of said plurality of transmitters operates are separated by a guard time interval during which neither one operates.

31. The method according to claim 29, wherein said guard time interval is selected so that there is substantially no overlap between the time period during which each of said plurality of transmitters operates and the time period during which another of said plurality of transmitters operates.

32. The method according to claim 30, wherein the guard time interval comprises a maximum guard time interval corresponding to a maximum time delay a data signal takes to propagate a distance between each of the plurality of transmitters to corresponding serviced areas and a minimum guard time interval corresponding to hardware switch over time.

33. The method according to claim 29, further comprising operating a receiver in the overlapping frequency range, wherein the receiver monitors data signal strength of a received data signal from one of said plurality of transmitters and compares the data signal strength of the received data signal to strength of data signals received from surrounding areas serviced by remaining transmitters in said plurality of second transceivers.

34. The method according to claim 33, wherein the receiver locks on a strongest data signal.

35. The method according to claim 33, wherein the receiver integrates the identical data signals transmitted by each of the plurality of transmitters.

36. The method according to claim 33, wherein one of said plurality of transmitters is a satellite and said receiver is configured to receive a data signal from said satellite and to receive data signals from remaining transmitters in said plurality of transmitters.

37. The method according to claim 36, wherein said remaining transmitters are terrestrial and are configured to receive the data signal from said satellite.

38. The method according to claim 36, wherein the satellite is assigned a time period and the remaining transmitters are assigned remaining time periods.

39. The method according to claim 38, wherein each of the remaining transmitters synchronizes to the time period assigned to the satellite and generates its time period start time.

40. The method according to claim 36, wherein the remaining transmitters are timed based upon a signal propagation time delay from the satellite to the ground.

41. The method according to claim 36, wherein the receiver locks on a strongest data signal among signals transmitted by the satellite and the remaining transmitters.

42. The method according to claim 36, wherein the receiver integrates identical data signals received from the satellite and each of the remaining transmitters in the plurality of second transmitters.

43. The method according to claim 29, wherein at least two transmitters in said plurality of second transmitters are terrestrial.

44. The method according to claim 29, wherein said plurality of second transmitters are terrestrial.

45. The method according to claim 29, wherein said plurality of second transmitters are controlled by a same control complex.

46. A system for communicating data signals in a network of transceivers, comprising:

a first transceiver; and

a plurality of second transceivers configured to communicate wirelessly with said first transceiver, said second transceivers being configured to service overlapping or adjacent areas, and each of said plurality of second transceivers being configured to operate in a time period different from a time period of another of said plurality of second transceivers,

wherein said first transceiver and said plurality of second transceivers operate in an overlapping frequency range, and said first transceiver is configured to communicate with any of said plurality of second transceivers.

47. The system according to claim 46, wherein said first transceiver is a receiver and said plurality of second transceivers are transmitters.

48. The system according to claim 46, wherein said plurality of second transceivers service said overlapping or adjacent areas by providing a plurality of data signals to said areas.

49. The system according to claim 48, wherein said plurality of data signals provided to said areas are identical.

50. The system according to claim 46, wherein the time period during which each of said plurality of second transceivers operates and the time period during which another of said plurality of second transceivers operates are separated by a guard time interval during which neither one operates.

51. The system according to claim 50, wherein said guard time interval is selected so that there is substantially no overlap between the time period during which each of said plurality of second transceivers operates and the time period during which another of said plurality of second transceivers operates.

52. The system according to claim 50, wherein said guard time interval is selected so as to minimize or substantially eliminate interference between signals transmitted or received by said first transceiver in said overlapping or adjacent areas.

53. The system according to claim 50, wherein the guard time interval comprises a maximum guard time interval corresponding to a time delay a signal takes to propagate a distance between each of the plurality of second transceivers to corresponding serviced areas and a minimum guard time interval corresponding to a hardware switch over time.

54. The system according to claim 46, wherein the first transceiver is configured to monitor signal strength of a received signal from one of said plurality of second transceivers and to compare the signal strength of the received signal to strength of signals received from surrounding areas serviced by remaining transceivers in said plurality of second transceivers.

55. The system according to claim 54, wherein the first transceiver locks on a strongest signal.

56. The system according to claim 54, wherein the first transceiver integrates identical signals received from each of the plurality of second transceivers.

57. The system according to claim 46, wherein each transceiver in said plurality of second transceivers is configured to monitor signal strength of a received signal from said first transceiver and configured to compare the signal strength of the received signal to strengths of signals received by remaining transceivers in said plurality of second transceivers from said first transceiver.

58. The system according to claim 57, wherein a transceiver in said plurality of second transceivers receiving the strongest signal from the first transceiver takes on communication with said first transceiver.

59. The system according to claim 46, wherein one of said plurality of second transceivers is a satellite and said first transceiver is configured to receive a signal from said satellite and from remaining transceivers in said plurality of second transceivers.

60. The system according to claim 59, wherein said remaining transceivers in said plurality of transceivers are terrestrial and are configured to receive the signal from said satellite.

61. The system according to claim 59, wherein the satellite is assigned a time period while the remaining transceivers in said plurality of transceivers are assigned remaining time periods.

62. The system according to claim 61, wherein each of the remaining transceivers synchronizes to the time period assigned to the satellite and generates its time period start time.

63. The system according to claim 62, wherein the remaining receivers are timed based upon a signal propagation time delay from the satellite to the ground.

64. The system according to claim 59, wherein the first transceiver is configured to lock on a strongest data signal among data signals transmitted by the satellite and the remaining transceivers.

65. The system according to claim 59, wherein the first transceiver is configured to integrate identical signals received from the satellite and each of the remaining transceivers in the plurality of second transceivers.

66. The system according to claim 46, further comprising a control complex configured to process signals and communicate the signals to said plurality of second transceivers.

67. The system according to claim 66, further comprising a multiplexer-demultiplexer distribution unit in communication with the control complex, said multiplexer-demultiplexer distribution unit being configured to distribute the signals to said plurality of second transceivers.

68. The system according to claim 66, wherein said control complex comprises a signal coding and framing device and a signal formatting and buffering device.

69. The system according to claim 67, further comprising an uplink system in communication with multiplexer-demultiplexer, wherein the uplink system is configured to send the signal received from the multiplexer-demultiplexer to a satellite.

70. The system according to claim 69, wherein the satellite is configured to communicate with at least one of said plurality of second transceivers, with said first transceiver or both.