WO2001077705A3 - Global positioning system receiver capable of functioning in the presence of interference - Google Patents

Global positioning system receiver capable of functioning in the presence of interference Download PDF

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Publication number
WO2001077705A3
WO2001077705A3 PCT/US2001/011431 US0111431W WO0177705A3 WO 2001077705 A3 WO2001077705 A3 WO 2001077705A3 US 0111431 W US0111431 W US 0111431W WO 0177705 A3 WO0177705 A3 WO 0177705A3
Authority
WO
WIPO (PCT)
Prior art keywords
analog
digital
band pass
pass filter
digital converter
Prior art date
Application number
PCT/US2001/011431
Other languages
French (fr)
Other versions
WO2001077705A2 (en
Inventor
Kishan Shenoi
Johann Heinzl
Gary Jacobsen
Jining Yang
Original Assignee
Symmetricom Inc
Kishan Shenoi
Johann Heinzl
Gary Jacobsen
Jining Yang
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 Symmetricom Inc, Kishan Shenoi, Johann Heinzl, Gary Jacobsen, Jining Yang filed Critical Symmetricom Inc
Priority to AU5325401A priority Critical patent/AU5325401A/en
Publication of WO2001077705A2 publication Critical patent/WO2001077705A2/en
Publication of WO2001077705A3 publication Critical patent/WO2001077705A3/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
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/35—Constructional details or hardware or software details of the signal processing chain
    • G01S19/37—Hardware or software details of the signal processing chain
    • 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
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/21—Interference related issues ; Issues related to cross-correlation, spoofing or other methods of denial of service
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
    • H03J1/0008—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/06—Arrangements for obtaining constant bandwidth or gain throughout tuning range or ranges
    • H03J3/08—Arrangements for obtaining constant bandwidth or gain throughout tuning range or ranges by varying a second parameter simultaneously with the tuning, e.g. coupling bandpass filter
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/71—Interference-related aspects the interference being narrowband interference
    • H04B1/7102—Interference-related aspects the interference being narrowband interference with transform to frequency domain

Abstract

Systems and methods are described for a GPS receiver capable of functioning in the presence of interference. A method includes detecting an interfering signal including: tuning a band pass filter over a frequency range; and at each of a plurality of incremental frequencies; computing a set of band pass filter coefficients; sending the set of band pass filter coefficients to a digital filter; repeatedly transforming an analog-to-digital converter output having a quantization level in excess of 2 bits into a band pass filter output with the digital filter to obtain a plurality of samples; computing an average of the plurality of samples; and comparing the average to a threshold to detect peaks that exceed a threshold. An apparatus, comprising: an analog radio frequency circuit; an analog-to-digital converter coupled to the analog radio frequency circuit, the analog-to-digital converter providing a quantization level in excess of 2 bits; a digital filter coupled to the analog-to-digital converter; and a digital circuit coupled to the digital filter.
PCT/US2001/011431 2000-04-05 2001-04-04 Global positioning system receiver capable of functioning in the presence of interference WO2001077705A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU5325401A AU5325401A (en) 2000-04-05 2001-04-04 Global positioning system receiver capable of functioning in the presence of interference

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US19479800P 2000-04-05 2000-04-05
US60/194,798 2000-04-05
US09/802,484 US6512803B2 (en) 2000-04-05 2001-03-09 Global positioning system receiver capable of functioning in the presence of interference
US09/802,484 2001-03-09

Publications (2)

Publication Number Publication Date
WO2001077705A2 WO2001077705A2 (en) 2001-10-18
WO2001077705A3 true WO2001077705A3 (en) 2002-07-04

Family

ID=26890406

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/011431 WO2001077705A2 (en) 2000-04-05 2001-04-04 Global positioning system receiver capable of functioning in the presence of interference

Country Status (3)

Country Link
US (2) US6512803B2 (en)
AU (1) AU5325401A (en)
WO (1) WO2001077705A2 (en)

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Also Published As

Publication number Publication date
US6842498B2 (en) 2005-01-11
US20030112905A1 (en) 2003-06-19
AU5325401A (en) 2001-10-23
US20020012411A1 (en) 2002-01-31
US6512803B2 (en) 2003-01-28
WO2001077705A2 (en) 2001-10-18

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