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Method for clock calibration in a position determination system

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • G04B-047/00
  • G04F-005/00
  • G01S-003/02
출원번호 US-0212480 (1994-03-14)
발명자 / 주소
  • Anderson Neal R. (Mesa AZ) Erickson Bart J. (Scottsdale AZ) Leung Keith (Chandler AZ)
출원인 / 주소
  • Motorola, Inc. (Schaumburg IL 02)
인용정보 피인용 횟수 : 52  인용 특허 : 0

초록

Timing signals are transmitted from reference transmitters through antenna/receivers (antenna preamplifier nodes) to collector nodes (C-Nodes) and to a central computer. The times of arrival of the signals at the various C-Nodes are measured by the C-Nodes, relative to each C-Node\s clock. The time

대표청구항

A method for clock calibration in a position determination system comprising the steps of: receiving by a central computer time of arrival signals from each of a plurality of C-Nodes having an internal clock; applying a C-Node to C-Node clock calibration by the central computer for each received tim

이 특허를 인용한 특허 (52)

  1. Anderson, Robert J.; Bull, Jeffrey F.; Czarnecki, Paul Matthew; Ginter, Thomas Stephen; Ward, Matthew L., Advanced triggers for location-based service applications in a wireless location system.
  2. Anderson, Robert J.; Bull, Jeffrey F.; Czarnecki, Paul Matthew; Ginter, Thomas Stephen; Ward, Matthew L., Advanced triggers for location-based service applications in a wireless location system.
  3. Anderson, Robert J.; Bull, Jeffrey F.; Czarnecki, Paul Matthew; Ginter, Thomas Stephen; Ward, Matthew L., Advanced triggers for location-based service applications in a wireless location system.
  4. Anderson, Robert J.; Bull, Jeffrey F.; Czarnecki, Paul; Ginter, Thomas Stephan; Ward, Matthew L., Advanced triggers for location-based service applications in a wireless location system.
  5. Stilp,Louis A.; Anderson,Robert J.; Ward,Matthew L., Applications processor including a database system, for use in a wireless location system.
  6. Ward, Andrew Martin Robert, Calibration of a location system.
  7. Brown, Jonathan E.; Burkart, Scott M., Data separation in high density environments.
  8. Ward, Matthew L.; Czarnecki, Paul M; Anderson, Robert J., Geo-fencing in a wireless location system.
  9. Yahata Haruki,JPX, Hybrid-synchronous type clock synchronizing apparatus of which dominant gain greater than sum of other gains network the.
  10. Richley, Edward A., Interference rejection in ultra-wideband real time locating systems.
  11. Richley, Edward A., Low-profile real-time location system tag.
  12. Richley, Edward A., Low-profile real-time location system tag.
  13. Alonso, Rodrigo; Turner, Belinda; Ameti, Aitan; Senerchia, David, Method and apparatus for associating radio frequency identification tags with participants.
  14. Samir S. Soliman, Method and apparatus for determining position location using reduced number of GPS satellites and synchronized and unsynchronized base stations.
  15. Hawkes Kelly Davidson ; Koehler Jeffrey Lynn, Method and apparatus for mobile emitter location.
  16. Richley, Edward A.; Turner, Belinda; Wang, Chang, Method for iterative target location in a multiple receiver target location system.
  17. Wohl, Michael A.; Traeger, Cynthia; O'Hagan, James J., Method, apparatus, and computer program product for determining play events and outputting events based on real-time data for proximity, movement of objects, and audio data.
  18. Wohl, Michael A.; Traeger, Cynthia; O'Hagan, James J., Method, apparatus, and computer program product for determining play events and outputting events based on real-time data for proximity, movement of objects, and audio data.
  19. O'Hagan, James J.; Alonso, Rodrigo; Wohl, Michael A., Method, apparatus, and computer program product for employing a spatial association model in a real time location system.
  20. Wohl, Michael A.; O'Hagan, James J., Method, apparatus, and computer program product for evaluating performance based on real-time data for proximity and movement of objects.
  21. Austerlade, David; Hofer, Gene; O'Hagan, James J., Method, apparatus, and computer program product for performance analytics determining participant statistical data and game status data.
  22. Richley, Edward A.; Turner, Belinda; Wang, Chang, Method, apparatus, and computer program product for real time location system referencing in physically and radio frequency challenged environments.
  23. O'Hagan, James J.; Wohl, Michael A., Method, apparatus, and computer program product for tag and individual correlation.
  24. Hughes, John K.; O'Hagan, James J., Method, apparatus, and computer program product improving real time location systems with multiple location technologies.
  25. O'Hagan, James J.; Alonso, Rodrigo G.; Wohl, Michael A., Method, apparatus, and computer program product improving registration with real time location services.
  26. O'Hagan, James; Alonso, Rodrigo; Wohl, Michael, Method, apparatus, and computer program product improving registration with real time location services.
  27. Richley, Edward A.; Turner, Belinda; Ameti, Aitan; Stelfox, Jill; O'Hagan, James J.; Mueggenborg, Alexander, Modular location tag for a real time location system network.
  28. Richley, Edward A.; Turner, Belinda; Ameti, Aitan; Stelfox, Jill; O'Hagan, James J.; Mueggenborg, Alexander, Modular location tag for a real time location system network.
  29. Anderson, Robert J., Monitoring of call information in a wireless location system.
  30. Anderson,Robert J., Monitoring of call information in a wireless location system.
  31. Richley, Edward A., Multiple antenna interference rejection in ultra-wideband real time locating systems.
  32. Anderson, Robert J.; Stilp, Louis A.; Ward, Matthew L., Multiple pass location processor.
  33. Stilp,Louis A.; Anderson,Robert J.; Ward,Matthew L., Multiple pass location processor.
  34. Bull, Jeffrey F.; Ward, Matthew L., Network autonomous wireless location system.
  35. Richley, Edward A.; Fontana, Robert J.; Perino, Donald V.; Ameti, Aitan, Object location system and method.
  36. Richley, Edward A.; Turner, Belinda; Wang, Chang; Ameti, Aitan, Receiver processor for adaptive windowing and high-resolution TOA determination in a multiple receiver target location system.
  37. Richley, Edward A.; Turner, Belinda; Wang, Chang; Ameti, Aitan, Receiver processor for bandwidth management of a multiple receiver real-time location system (RTLS).
  38. Raymond, Luke, Synchronization of a generated clock.
  39. Burkart, Scott M.; Brown, Jonathan E., Synchronization of devices in a RFID communications environment.
  40. Anderson, Robert J., System and method for interference cancellation in a location calculation, for use in a wireless location system.
  41. Forstrom, Howard Scott; McCrady, Dennis D.; Doyle, Lawrence J., System for determining position of an emitter.
  42. Turner, Belinda; Ameti, Aitan; Richley, Edward A.; Mueggenborg, Alexander, System, apparatus and methods for variable rate ultra-wideband communications.
  43. Stelfox, Jill; Wohl, Michael A.; O'Hagan, James J.; Traeger, Cynthia, Systems and methods for activity determination based on human frame.
  44. Stelfox, Jill; Wohl, Michael; O'Hagan, James; Traeger, Cynthia, Systems and methods for activity determination based on human frame.
  45. Turner, Belinda; Ameti, Aitan; Richley, Edward A.; Mueggenborg, Alexander, Systems, apparatus and methods for variable rate ultra-wideband communications.
  46. Hawkes Kelly D. ; Koehler Jeffrey L., Time difference of arrival measurement system.
  47. Guilford,John H., Time synchronization system and method for synchronizing locating units within a communication system using a known external signal.
  48. Kangas Ari,SEX ; Larsson Erik,SEX ; Fischer Sven,DEX, Use of global positioning system in locating a radio transmitter.
  49. Bekritsky,Benjamin J.; Goren,David; Sakoda,William; Bridgelall,Raj, Wireless clock synchronization.
  50. Ameti, Aitan; Chen, Keming; Fontana, Robert J.; Richley, Edward A.; Turner, Belinda, Wireless time reference system and method.
  51. Ameti, Altan; Chen, Keming; Fontana, Robert J; Richley, Edward A; Turner, Belinda, Wireless time reference system and method.
  52. Ameti,Aitan; Chen,Keming; Fontana,Robert J.; Richley,Edward A.; Turner,Belinda, Wireless time reference system and method.
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