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Calibration and correction system for satellite position location systems

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • G01S-005/14
출원번호 US-0336125 (2003-01-03)
발명자 / 주소
  • Krasner, Norman
출원인 / 주소
  • Qualcomm Incorporated
대리인 / 주소
    Wadsworth Philip
인용정보 피인용 횟수 : 146  인용 특허 : 12

초록

To provide accurate and quick position measurements in a practical mobile position location system, the GPS receiver is calibrated, a frequency error in the next time period is predicted using a first frequency locked to an externally transmitted signal, and a second frequency is generated by a GPS

대표청구항

1. A method of correcting a GPS receiver comprising:producing a first frequency locked to a cellular network signal;generating a second frequency in a GPS oscillator during a first time period;computing a first error based upon comparisons of said first and second frequencies during said first time

이 특허에 인용된 특허 (12)

  1. Stilp Louis A., Calibration for wireless location system.
  2. Stilp Louis A., Calibration for wireless location system.
  3. Misra Pratap N. (27 Hop Brook La. Sudbury MA 01776), Clock-aided satellite navigation receiver system for enhanced position estimation and integrity monitoring.
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  5. Krasner Norman F., Combined GPS positioning system and communications system utilizing shared circuitry.
  6. Krasner Norman F., GPS receiver having power management.
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  11. Chun Yang, Method and device for rapidly extracting time and frequency parameters from high dynamic direct sequence spread spectrum radio signals under interference.
  12. Taylor Ralph E. (Silver Spring MD) Sennott James W. (Bloomington IL), Navigation system and method.

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