WO2005008278A3 - Location determination by multiple measurements having position fix improvements - Google Patents

Location determination by multiple measurements having position fix improvements Download PDF

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Publication number
WO2005008278A3
WO2005008278A3 PCT/US2004/023578 US2004023578W WO2005008278A3 WO 2005008278 A3 WO2005008278 A3 WO 2005008278A3 US 2004023578 W US2004023578 W US 2004023578W WO 2005008278 A3 WO2005008278 A3 WO 2005008278A3
Authority
WO
WIPO (PCT)
Prior art keywords
pseudo range
position determination
improved
transmitting
range measurements
Prior art date
Application number
PCT/US2004/023578
Other languages
French (fr)
Other versions
WO2005008278A2 (en
Inventor
Peter Gaal
Original Assignee
Qualcomm Inc
Peter Gaal
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Inc, Peter Gaal filed Critical Qualcomm Inc
Priority to BRPI0412776-5A priority Critical patent/BRPI0412776A/en
Publication of WO2005008278A2 publication Critical patent/WO2005008278A2/en
Publication of WO2005008278A3 publication Critical patent/WO2005008278A3/en
Priority to IL173235A priority patent/IL173235A0/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
    • G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/42—Determining position

Abstract

Methods and apparatus for improved position determination of a device using multiple pseudo range measurements from transmitting sources at known locations, such as GPS satellites. A plurality of pseudo range measurements for each transmitting source are processed together to obtain a simplified maximum likelihood estimate for the pseudo range for that transmitting source at a common reference time. The processed pseudo range estimates for all transmitting sources are then combined using conventional position determination algorithms. This technique facilitates removal of raw measurement outliers prior to position determination, which results in improved (i.e., more accurate) position fixes of the device. In addition, improved measurement integrity monitoring of the pseudo range measurements is a feature of this invention.
PCT/US2004/023578 2003-07-21 2004-07-21 Location determination by multiple measurements having position fix improvements WO2005008278A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BRPI0412776-5A BRPI0412776A (en) 2003-07-21 2004-07-21 location determination by multiple measurements having position adjustment enhancements
IL173235A IL173235A0 (en) 2003-07-21 2006-01-18 Location determination by multiple measurements having position fix improvements

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/624,367 2003-07-21
US10/624,367 US6842715B1 (en) 2003-07-21 2003-07-21 Multiple measurements per position fix improvements

Publications (2)

Publication Number Publication Date
WO2005008278A2 WO2005008278A2 (en) 2005-01-27
WO2005008278A3 true WO2005008278A3 (en) 2005-05-12

Family

ID=33552857

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2004/023578 WO2005008278A2 (en) 2003-07-21 2004-07-21 Location determination by multiple measurements having position fix improvements

Country Status (5)

Country Link
US (1) US6842715B1 (en)
KR (1) KR100880545B1 (en)
BR (1) BRPI0412776A (en)
IL (1) IL173235A0 (en)
WO (1) WO2005008278A2 (en)

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Also Published As

Publication number Publication date
US20050021284A1 (en) 2005-01-27
BRPI0412776A (en) 2006-09-26
WO2005008278A2 (en) 2005-01-27
KR100880545B1 (en) 2009-02-03
US6842715B1 (en) 2005-01-11
KR20060052855A (en) 2006-05-19
IL173235A0 (en) 2006-06-11

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