WO2009124071A3 - Methods and systems for determining the location of an electronic device - Google Patents

Methods and systems for determining the location of an electronic device Download PDF

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Publication number
WO2009124071A3
WO2009124071A3 PCT/US2009/038992 US2009038992W WO2009124071A3 WO 2009124071 A3 WO2009124071 A3 WO 2009124071A3 US 2009038992 W US2009038992 W US 2009038992W WO 2009124071 A3 WO2009124071 A3 WO 2009124071A3
Authority
WO
WIPO (PCT)
Prior art keywords
location
mobile device
determining
systems
methods
Prior art date
Application number
PCT/US2009/038992
Other languages
French (fr)
Other versions
WO2009124071A2 (en
Inventor
Mehran Moshfeghi
Original Assignee
Radiofy Llc
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 Radiofy Llc filed Critical Radiofy Llc
Publication of WO2009124071A2 publication Critical patent/WO2009124071A2/en
Publication of WO2009124071A3 publication Critical patent/WO2009124071A3/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
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/14—Determining absolute distances from a plurality of spaced points of known location
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
    • G01C21/20—Instruments for performing navigational calculations
    • 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
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
    • 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
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/08—Systems for measuring distance only
    • G01S13/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
    • G01S13/36—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated with phase comparison between the received signal and the contemporaneously transmitted signal
    • G01S13/38—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated with phase comparison between the received signal and the contemporaneously transmitted signal wherein more than one modulation frequency is used

Abstract

Embodiments of the present invention include a method of determining a location of a mobile device. The method comprises transmitting a signal between a plurality of known locations and receiving signal at device of unknown location such as a mobile device. The signal may include multiple tones having different frequencies and resulting in sets of residual phase differences. The location of the mobile device may be determined using the known locations and the frequency and phase differences between the transmitted tones. In one embodiment, OFDM signals may be used between an access point and mobile device, for example, to determine the location of the mobile device.
PCT/US2009/038992 2008-03-31 2009-03-31 Methods and systems for determining the location of an electronic device WO2009124071A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/059,558 2008-03-31
US12/059,558 US7800541B2 (en) 2008-03-31 2008-03-31 Methods and systems for determining the location of an electronic device

Publications (2)

Publication Number Publication Date
WO2009124071A2 WO2009124071A2 (en) 2009-10-08
WO2009124071A3 true WO2009124071A3 (en) 2009-12-30

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2009/038992 WO2009124071A2 (en) 2008-03-31 2009-03-31 Methods and systems for determining the location of an electronic device

Country Status (2)

Country Link
US (6) US7800541B2 (en)
WO (1) WO2009124071A2 (en)

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