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Apparatus for estimating a line of sight signal propagation time using a reduced-multipath correlation function 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • H04B-001/707
  • H04B-001/12
  • G01S-005/02
  • H03D-001/04
출원번호 US-0531170 (1995-09-19)
발명자 / 주소
  • Van Nee Richard D.J. (Delft NLX)
출원인 / 주소
  • NovAtel, Inc. (Calgary CAX 03)
인용정보 피인용 횟수 : 61  인용 특허 : 5

초록 ▼

A method and device for processing a signal are described, wherein an estimate of a multipath-induced contribution to a demodulated navigation signal is calculated and subtracted from said demodulated navigation signal to obtain an estimated line of sight contribution to said demodulated navigation

대표청구항 ▼

A positioning signal processing system which receives from a transmitter a data carrying carrier modulated with a pseudo random noise signal, and processes the received data carrying signal to determine a propagation time t0 indicative of the time it takes the received data carrying signal to propag

이 특허에 인용된 특허 (5)

  1. Jasper Steven C. (Schaumburg IL) Janc Robert V. (Palos Heights IL) Robins David S. (Buffalo Grove IL) Retzer Michael H. (Schaumburg IL), Apparatus and method for attenuating interfering signals.
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  2. Hostetter George R. (Santa Clara CA) Babitch Daniel (San Jose CA), Code position modulation system and method for multiple user satellite communications.
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  3. Counselman ; III Charles C. (Belmont MA), Multi-antenna gas receiver for seismic survey vessels.
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  4. Meehan Thomas K. (Glendale CA), Multipath noise reduction for spread spectrum signals.
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  5. Lennen Gary R. (San Jose CA), Signal timing synchronizer.
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이 특허를 인용한 특허 (61)

  1. Ozluturk, Faith M.; Lomp, Gary R.; Kowalski, John, Apparatus for adaptive reverse power control for spread-spectrum communications.
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  2. Manz,Allan, Apparatus for and method of improving position and time estimation of radio location devices using calibrated pulse shapes.
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  3. Ozluturk,Fatih M.; Lomp,Gary R.; Kowalski,John, Apparatus for initial power control for spread-spectrum communications.
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  4. Lomp, Gary R.; Ozluturk, Faith M.; Kowalski, John, Automatic power control system for a code division multiple access (CDMA) communications system.
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  5. Lomp, Gary; Ozluturk, Fatih; Kowalski, John, Automatic power control system for a code division multiple access (CDMA) communications system.
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  6. Lomp,Gary; Ozluturk,Fatih; Kowalski,John, Automatic power control system for a code division multiple access (CDMA) communications system.
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  7. Ozluturk, Fatih M.; Jacques, Alexander M.; Lomp, Gary R.; Kowalski, John, Code division multiple access (CDMA) communication system.
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  8. Ozukturk, Fatih; Jacques, Alexander; Lomp, Gary; Kowalski, John, Code division multiple access (CDMA) communication system.
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  9. Rayman W. Pon, Code multipath estimation for weighted or modified tracking.
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  10. Pon Rayman W., Code multipath estimation for weighted or modified tracking using weighted or modified correlations.
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  11. Sirin Tekinay, Detecting the geographical location of wireless units.
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  12. Lomp, Gary R.; Ozluturk, Faith, Efficient multipath centroid tracking circuit for a code division multiple access (CDMA) system.
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  13. Lomp, Gary; Ozluturk, Fatih, Efficient multipath centroid tracking circuit for a code division multiple access (CDMA) system.
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  14. Roh, Dongwook; Kim, Sanggook; Sun, Lihsiang, Enhanced access channel masks for xHRPD.
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  15. Roh, Dongwook; Kim, Sanggook; Sun, Lihsiang, Enhanced access channel masks for xHRPD.
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  16. Shan,Peijun, Estimation of multipath channel with sub-chip resolution.
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  17. Ozluturk,Fatih M.; Lomp,Gary R.; Kowalski,John, Initial power control for spread-spectrum communications.
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  18. Lomp,Gary R., Median weighted tracking for spread-spectrum communications.
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  19. Ozluturk, Fatih; Lomp, Gary R.; Kowalski, John, Method and apparatus for adaptive power control for spread-spectrum communications.
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  20. Sheynblat Leonid ; Krasner Norman F., Method and apparatus for measurement processing of satellite positioning system (SPS) signals.
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  21. Sheynblat, Leonid; Krasner, Norman F., Method and apparatus for measurement processing of satellite positioning system (SPS) signals.
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  22. Sourour, Essam; Bottomley, Greg; Ramesh, Rajaram; Chennakeshu, Sandeep, Method and apparatus for multipath delay estimation in direct sequence spread spectrum communication systems.
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  23. Chen, Shiou-Hung; Marshall, Grant Alexander; Simic, Emilija M.; Rowitch, Douglas Neal; Pon, Rayman Wai, Method and apparatus for multipath mitigation.
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  24. Shan, Peijun; King, Eric J., Method and apparatus for multipath parameter estimation in spread-spectrum communications systems.
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  25. Shan,Peijun, Method and apparatus for multipath signal compensation in spread-spectrum communications systems.
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  26. Shan,Peijun; King,Eric J., Method and apparatus for multipath signal compensation in spread-spectrum communications systems.
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  27. Goldberg, Jason; Abraham, Charles; Tapucu, Emre, Method and apparatus for performing frequency synchronization.
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  28. Goldberg, Jason; Abraham, Charles; Tapucu, Emre, Method and apparatus for performing frequency synchronization.
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  29. Abraham, Charles; de la Porte, Serge; Podshivalov, Sergei, Method and apparatus for performing signal correlation.
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  30. Abraham, Charles; Fuchs, Donald L., Method and apparatus for performing signal correlation at multiple resolutions to mitigate multipath interference.
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  31. Abraham, Charles; Tapucu, Emre, Method and apparatus for performing signal correlation using historical correlation data.
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  32. Abraham, Charles; Tapucu, Emre, Method and apparatus for performing signal processing using historical correlation data.
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  33. Hyun, Sung-Hwan, Method and apparatus tracking global navigation satellite system (GNSS).
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  34. Ozluturk, Fatih; Lomp, Gary, Method and subscriber unit for performing power control.
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  35. Ozluturk, Fatih M.; Lomp, Gary R.; Kowalski, John, Method for adaptive forward power control for spread-spectrum communications.
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  36. Ozluturk, Faith M.; Lomp, Gary R.; Kowalski, John, Method for adaptive reverse power control for spread-spectrum communications.
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  37. Tekinay Sirin, Method for frequency environment modeling and characterization.
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  38. Tekinay Sirin, Method for improved line of sight signal detection using time/frequency analysis.
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  39. Tekinay Sirin, Method for improved line-of-sight signal detection using RF model parameters.
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  40. Ozluturk, Fatih M.; Lomp, Gary R.; Kowalski, John, Method for initial power control for spread-spectrum communications.
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  41. Tsunehara, Katsuhiko; Doi, Nobukazu; Kuwahara, Mikio; Ishifuji, Tomoaki, Method for measuring distance and position using spread spectrum signal, and an equipment using the method.
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  42. Tsunehara, Katsuhiko; Doi, Nobukazu; Kuwahara, Mikio; Ishifuji, Tomoaki, Method for measuring distance and position using spread spectrum signal, and an equipment using the method.
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  43. Tsunehara, Katsuhiko; Doi, Nobukazu; Kuwahara, Mikio; Ishifuji, Tomoaki, Method for measuring distance and position using spread spectrum signal, and an equipment using the method.
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  44. Tsunehara, Katsuhiko; Doi, Nobukazu; Kuwahara, Mikio; Ishifuji, Tomoaki, Method for measuring distance and position using spread spectrum signal, and an equipment using the method.
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  45. Liu, Gang; Zou, Li, Method for symbol synchronization of received digital signal and digital signal receiver using the same method.
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  46. Ohsuge,Michihiro, Multi-path detection circuit and method for a CDMA receiver.
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  47. Han, Shaowel, Multipath error estimation in satellite navigation receivers.
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  48. Townsend, Bryan; Wiebe, Jonathan; Jakab, Andy, Multipath meter.
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  49. Shan, Peijun; King, Eric J., Multipath parameter estimation in spread-spectrum communications systems.
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  50. Mo, Jun; Han, Shaowei, Narrow correlator technique for multipath mitigation.
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  51. Onu Dan, Period determination of a periodic signal.
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  52. Rowitch, Douglas N., Procedure for detecting interfering multi-path condition.
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  53. Rowitch, Douglas N.; Patrick, Christopher, Procedure for searching for position determination signals using a plurality of search modes.
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  54. Lomp,Gary; Kowalski,John; Ozluturk,Fatih; Silverberg,Avi; Regis,Robert; Luddy,Michael; Marra,Alexander; Jacques,Alexander, Rapid acquisition spreading codes for spread-spectrum communications.
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  55. Friedman, Craig D.; Datta, Arindam, Repair of spinal annular defects and annulo-nucleoplasty regeneration.
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  56. Datta, Arindam; Friedman, Craig; Klempner, Daniel; Sendijarevic, Aisa, Reticulated elastomeric matrices, their manufacture and use in implantable devices.
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  57. Kayahara,Naoki; Sakai,Hiroaki, Sight line inducing information display device, sight line inducing information display program and sight line inducing information display method.
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  58. Lomp, Gary; Kowalski, John; Ozluturk, Fatih; Silverberg, Avi; Regis, Robert; Luddy, Michael; Marra, Alexander; Jacques, Alexander, Spread spectrum system assigning information signals to message-code signals.
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  59. Lomp, Gary; Kowalski, John; Ozluturk, Fatih; Silverberg, Avi; Regis, Robert; Luddy, Michael; Marra, Alexander; Jacques, Alexander, Spread-spectrum system for assigning information signals having different data rates.
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  60. Ozluturk,Fatih M.; Lomp,Gary R., System for using rapid acquisition spreading codes for spread-spectrum communications.
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  61. Lomp, Gary; Ozluturk, Fatih; Silverberg, Avi, Transferring voice and non-voice data.
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