GNSS RECEIVER POSITIONING SYSTEM

• US 20140184442A1
• Filed: 12/19/2013
• Published: 07/03/2014
• Est. Priority Date: 12/28/2012
• Status: Active Grant

• Current Assignee: Trimble Inc.
• Original Assignee: Trimble Navigation Limited (Trimble Inc.)
• Inventors: Large, Peter, Rudow, Richard, Wold, Robert, Janky, James M., Kasirajan, Venkateswaran
• Granted Patent: US 9,612,341 B2
• Time in Patent Office: Days
• US Class Current: 342/357.42
• CPC Class Codes: G01S 19/41 Differential correction, e.g. DGPS [differential GPS]
• CPC Class Codes: G01S 19/43 using carrier phase measurements, e.g. kinematic positioning; using long or short baseline interferometry

Abstract

A method of extracting pseudorange information using a cellular device. A Global Navigation Satellite System (GNSS) chipset which is physically remote from a cellular device is accessed which provides raw GNSS observables information based upon signals received from a circularly polarized GNSS antenna. The raw GNSS observables information is wirelessly transmitted from the GNSS chipset to the cellular device. The raw GNSS observables information is extracted by a processor of the cellular device. The raw GNSS observables information, in addition to GNSS corrections from at least one correction source, is used by the processor to determine a position of the circularly polarized GNSS antenna.

Claims

1. A method of extracting pseudorange information using a cellular device, the method comprising:

accessing a Global Navigation Satellite System (GNSS) chipset which is physically remote from a cellular device, wherein said GNSS chipset provides raw GNSS observables information based upon signals received from a circularly polarized GNSS antenna;

wirelessly transmitting the raw GNSS observables information from said GNSS chipset to said cellular device;

extracting the raw GNSS observables information by a processor of said cellular device; and

using, by said processor, the raw GNSS observables information, in addition to GNSS corrections from at least one correction source, to determine a position of said circularly polarized GNSS antenna.

2. The method of claim 1 wherein said processor is utilized as a primary processor of said cellular device.

3. The method of claim 1 wherein said raw GNSS observables information comprises carrier phase information.

4. The method of claim 1 wherein said raw GNSS observables information comprises Doppler shift information.

5. The method of claim 1 wherein said raw GNSS observables information comprises pseudorange information.

6. The method of claim 5 further comprising:

smoothing the pseudorange information to create smoothed pseudorange information using smoothing logic of said receiving component.

7. The method of claim 6 further comprising:

smoothing the pseudorange information based on real carrier phase information that is derived based on the carrier phase information using real carrier phase logic of said cellular device.

8. The method of claim 6 further comprising:

correcting said smoothed pseudorange information to create corrected pseudoranges using correcting logic of said cellular device.

9. The method of claim 8 further comprising:

creating the corrected pseudoranges based on one or more types of pseudorange corrections received by said cellular device, said pseudorange corrections selected from a group consisting of Differential Global Positioning System (DGPS), Precise Point Positioning (PPP), Real Time Kinematic (RTK), and RTX.

10. The method of claim 6 further comprising:

accessing Wide Area Augmentation System (WAAS) pseudorange corrections using accessing logic of said cellular device;

storing the WAAS pseudorange corrections in a memory device of said cellular device;

accessing the smoothed pseudorange information and the WAAS pseudorange corrections using pseudorange information processing logic of said cellular device; and

determining a position fix of said circularly polarized GNSS antenna using the pseudorange information processing logic based on the smoothed pseudorange information and the WAAS pseudorange corrections using said processor.

11. The method of claim 5 further comprising:

determining whether to apply any improvements to the pseudorange information using position accuracy improvement determination logic of said cellular device; and

determining one or more improvements to be applied to the pseudorange information, if the determination is that any improvements will be applied using the position accuracy improvement determination logic of said cellular device.

12. The method of claim 1 further comprising:

disposing said GNSS chipset, said circularly polarized GNSS antenna, and a wireless communication component in a housing of a receiving component which is separate from said cellular device.

13. The method of claim 12 further comprising:

coupling said receiving component with an article of clothing.

14. The method of claim 13 wherein said article of clothing comprises a solar panel configured to generate electricity, said method further comprising:

using said solar panel to recharge a battery disposed within said receiving component.

15. The method of claim 12 further comprising:

disposing said receiving component with a support pole used to locate a point on the ground.

16. The method of claim 12 further comprising:

disposing said receiving component upon a moveable traffic management device.

17. The method of claim 1 wherein said GNSS chipset comprises an abbreviated feature set GNSS chipset.

18. The method of claim 1 wherein said GNSS chipset is configured to process at least one of an L1 GNSS signal and an L2C GNSS signal.

19. The method of claim 1 wherein the GNSS corrections from said at least one correction source are not contained in a GNSS signal.

20. A non-transitory computer readable storage medium having computer readable instructions stored thereon for causing a computer system to perform a method of extracting pseudorange information using a cellular device, the method comprising:

accessing a Global Navigation Satellite System (GNSS) chipset which is physically remote from a cellular device, wherein said GNSS chipset provides raw GNSS observables information upon signals received from a circularly polarized GNSS antenna;

wirelessly transmitting the raw GNSS observables information from said GNSS chipset to said cellular device;

extracting the raw GNSS observables information by a processor of said cellular device; and

using by said processor, the raw GNSS observables information, in addition to GNSS corrections from at least one correction source, to determine a position of said circularly polarized GNSS antenna.

21. The non-transitory computer readable storage medium of claim 20 wherein said processor is utilized as a primary processor of said cellular device.

22. The non-transitory computer readable storage medium of claim 20 wherein said raw GNSS observables information comprises carrier phase information.

23. The non-transitory computer readable storage medium of claim 20 wherein said raw GNSS observables information comprises Doppler shift information.

24. The non-transitory computer readable storage medium of claim 20 wherein said raw GNSS observables information comprises pseudorange information.

25. The non-transitory computer readable storage medium of claim 24 wherein said method further comprises:

smoothing the pseudorange information to create smoothed pseudorange information using smoothing logic of said receiving component.

26. The non-transitory computer readable storage medium of claim 25 wherein said method further comprises:

smoothing the pseudorange information based on real carrier phase information that is derived based on the carrier phase information using real carrier phase logic of said cellular device.

27. The non-transitory computer readable storage medium of claim 25 wherein said method further comprises:

correcting said smoothed pseudorange information to create corrected pseudoranges using correcting logic of said cellular device.

28. The non-transitory computer readable storage medium of claim 27 wherein said method further comprises:

creating the corrected pseudoranges based on one or more types of pseudorange corrections received by said cellular device, said pseudorange corrections selected from a group consisting of Differential Global Positioning System (DGPS), Precise Point Positioning (PPP), Real Time Kinematic (RTK), and RTX.

29. The non-transitory computer readable storage medium of claim 25 wherein said method further comprises:

accessing Wide Area Augmentation System (WAAS) pseudorange corrections using accessing logic of said cellular device;

storing the WAAS pseudorange corrections in a memory device of said cellular device;

accessing the smoothed pseudorange information and the WAAS pseudorange corrections using pseudorange information processing logic of said cellular device; and

determining a position fix of said circularly polarized GNSS antenna using the pseudorange information processing logic based on the smoothed pseudorange information and the WAAS pseudorange corrections using said processor.

30. The non-transitory computer readable storage medium of claim 24 wherein said method further comprises:

determining whether to apply any improvements to the pseudorange information using position accuracy improvement determination logic of said cellular device; and

determining one or more improvements to be applied to the pseudorange information, if the determination is that any improvements will be applied using the position accuracy improvement determination logic of said cellular device.

31. The non-transitory computer readable storage medium of claim 20 wherein said method further comprises:

disposing said GNSS chipset, said circularly polarized GNSS antenna, and a wireless communication component in a housing of a receiving component which is separate from said cellular device.

32. The non-transitory computer readable storage medium of claim 31 wherein said method further comprises:

coupling said receiving component with an article of clothing.

33. The non-transitory computer readable storage medium of claim 32 wherein said article of clothing comprises a solar panel configured to generate electricity, and wherein said method further comprises:

using said solar panel to recharge a battery disposed within said receiving component.

34. The non-transitory computer readable storage medium of claim 31 wherein said method further comprises:

disposing said receiving component with a support pole used to locate a point on the ground.

35. The non-transitory computer readable storage medium of claim 31 wherein said method further comprises:

disposing said receiving component upon a moveable traffic management device.

36. The non-transitory computer readable storage medium of claim 20 wherein said method further comprises:

using an abbreviated feature set GNSS chipset as said GNSS chipset.

37. The non-transitory computer readable storage medium of claim 20 wherein said method further comprises:

using a GNSS chipset configured to process at least one of an L1 GNSS signal and an L2C GNSS signal as said chipset.

38. The non-transitory computer readable storage medium of claim 20 wherein the GNSS corrections from said at least one correction source are not contained in a GNSS signal.

39. A Global Navigation Satellite System (GNSS) positioning system comprising:

a receiving component comprising;

a circularly polarized GNSS antenna configured to receive a plurality of GNSS satellite signals;

a GNSS chipset configured to derive GNSS raw observables information from said plurality of GNSS satellite signals; and

a first wireless communication component for wirelessly conveying the GNSS raw observables information; and

a cellular device which is physically remote from said circularly polarized GNSS antenna and said GNSS chipset, comprising;

a second wireless communication component configured to receive the GNSS raw observables information from said receiving component; and

a processor configured to access the GNSS raw observables information and to derive a position of said GNSS antenna based upon GNSS raw observables information in combination with GNSS corrections received from at least one correction source.

40. The GNSS positioning system of claim 39 wherein said processor comprises a primary processor of said cellular device.

41. The GNSS positioning system of claim 39 wherein said raw GNSS observables information comprises carrier phase information.

42. The GNSS positioning system of claim 39 wherein said raw GNSS observables information comprises Doppler shift information.

43. The GNSS positioning system of claim 39 wherein said raw GNSS observables information comprises pseudorange information.

44. The GNSS positioning system of claim 43 wherein said cellular device further comprises:

smoothing logic for smoothing said pseudorange information to create smoothed pseudorange information.

45. The GNSS positioning system of claim 44 wherein said cellular device further comprises:

real carrier phase logic for smoothing the pseudorange information based on real carrier phase information that is derived based on the carrier phase information.

46. The GNSS positioning system of claim 44 wherein said cellular device further comprises:

correcting logic for correcting the smoothed pseudorange information to create corrected pseudoranges.

47. The GNSS positioning system of claim 46, wherein the corrected pseudoranges are pseudoranges that were corrected based on one or more types of pseudorange corrections received via a third wireless communication component of said cellular device, said pseudorange corrections selected from a group consisting of Differential Global Positioning System (DGPS), Precise Point Positioning (PPP), Real Time Kinematic (RTK), and RTX.

48. The GNSS positioning system of claim 44 wherein said cellular device further comprises:

accessing logic configured to access Wide Area Augmentation System (WAAS) pseudorange corrections;

a memory configured to store the WAAS pseudorange corrections; and

pseudorange information processing logic configured to access the smoothed pseudorange information and the WAAS pseudorange corrections and wherein said processor is configured to determine a position fix of said circularly polarized GNSS antenna using the pseudorange information processing logic based on the smoothed pseudorange information and the WAAS pseudorange corrections.

49. The GNSS positioning system of claim 39, wherein said cellular device further comprises:

position accuracy improvement determination logic for determining whether to apply any improvements to pseudorange information and for determining one or more improvements to be applied to pseudorange information, if the determination is that any improvements will be applied.

50. The GNSS positioning system of claim 39 further comprising:

disposing said GNSS chipset, said circularly polarized GNSS antenna, and a wireless communication component in a housing of a receiving component which is separate from said cellular device.

51. The GNSS positioning system of claim 50 wherein said receiving component is coupled with an article of clothing.

52. The GNSS positioning system of claim 51 wherein said article of clothing further comprises a solar panel configured to generate electricity and is used to recharge a battery disposed within said receiving component.

53. The GNSS positioning system of claim 50 wherein said receiving component is coupled with a support pole used to locate a point on the ground.

54. The GNSS positioning system of claim 50 said receiving component is disposed upon a moveable traffic management device.

55. The GNSS positioning system of claim 39 wherein said GNSS chipset comprises an abbreviated feature set GNSS chipset.

56. The GNSS positioning system of claim 39 wherein said GNSS chipset is configured to process at least one of an L1 GNSS signal and an L2C GNSS signal.

57. The GNSS positioning system of claim 39 wherein the GNSS corrections from said at least one correction source are not contained in a GNSS signal.

58. A helmet-mounted Global Navigation Satellite System (GNSS) receiver positioning system comprising:

a hard hat comprising a receiving component, said receiving component comprising;

a circularly polarized GNSS antenna configured to receive respective signals from a plurality of GNSS satellites;

a GNSS chipset configured to provide GNSS raw observables information from said respective signals of said plurality of GNSS satellites; and

a first wireless communication component configured to transmit the GNSS raw observables information, and wherein said circularly polarized GNSS antenna, said GNSS chipset, and said first wireless communication component are disposed within a housing; and

a cellular device, which is physically remote from said circularly polarized GNSS antenna and said GNSS chipset, comprising;

a second wireless communication component configured to receive the GNSS raw observables information sent by said first wireless communication component; and

a processor configured to process the GNSS raw observables information in combination with at least one GNSS correction received from at least one correction source to derive a position of said circularly polarized GNSS antenna.

59. The helmet-mounted GNSS receiver positioning system of claim 58 wherein said circularly polarized GNSS antenna comprises a GNSS patch antenna.

60. The helmet-mounted GNSS receiver positioning system of claim 58 wherein said GNSS chipset comprises an abbreviated feature set GNSS chipset.

61. The helmet-mounted GNSS receiver positioning system of claim 58 wherein said GNSS chipset is configured to process at least one of an L1 GNSS signal and an L2C GNSS signal.

62. The helmet-mounted GNSS receiver positioning system of claim 58 further comprising:

a rechargeable battery disposed within said housing.

63. The helmet-mounted GNSS receiver positioning system of claim 62 further comprising:

a power connection disposed within said housing configured to receive electrical power from a solar panel disposed upon said hard hat; and

a power line conditioner disposed within said housing and coupled with said power connection and said rechargeable battery, said power line conditioner configured to convert power received via said power connection to a voltage suitable for re-charging said rechargeable battery.

64. The helmet-mounted GNSS receiver positioning system of claim 63 wherein said hard hat further comprises:

a compartment disposed at the top of said hard hat and configured to contain said receiving component;

an electrical connection for providing electrical power to said receiving component from said solar panel; and

a cover for said compartment configured to protect said receiving component from moisture, dust, and impact.

65. The helmet-mounted GNSS receiver positioning system of claim 63 wherein said hard hat further comprises:

a compartment disposed on the underside of said hard hat and configured to contain said receiving component;

an electrical connection for providing electrical power to said receiving component from said solar panel; and

a cover for said compartment configured to protect said receiving component from moisture, dust, and impact.

66. The helmet-mounted GNSS receiver positioning system of claim 58 wherein said wireless communication component is configured to operate in compliance with the IEEE 802.15.4 specification for personal area networks.

67. The helmet-mounted GNSS receiver positioning system of claim 58 wherein said wireless communication component is configured to operate in compliance with the Instrument Scientific and Medical (ISM) band of the radio frequency spectrum in the 2400-2484 MHz range.

68. The helmet-mounted GNSS receiver positioning system of claim 58 wherein said raw GNSS observables information comprises pseudorange information.

69. The helmet-mounted GNSS receiver positioning system of claim 58 wherein said raw GNSS observables information comprises carrier phase information.

70. The helmet-mounted GNSS receiver positioning system of claim 58 wherein said raw GNSS observables information comprises Doppler shift information.