WO2009030772A3 - Method and device for multipath mitigation - Google Patents

Method and device for multipath mitigation Download PDF

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Publication number
WO2009030772A3
WO2009030772A3 PCT/EP2008/061831 EP2008061831W WO2009030772A3 WO 2009030772 A3 WO2009030772 A3 WO 2009030772A3 EP 2008061831 W EP2008061831 W EP 2008061831W WO 2009030772 A3 WO2009030772 A3 WO 2009030772A3
Authority
WO
WIPO (PCT)
Prior art keywords
spreading code
pulse
chipping
modulated
received signal
Prior art date
Application number
PCT/EP2008/061831
Other languages
French (fr)
Other versions
WO2009030772A2 (en
Inventor
Wilde Wim De
Jean-Marie Sleewaegen
Original Assignee
Septentrio Nv
Wilde Wim De
Jean-Marie Sleewaegen
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 Septentrio Nv, Wilde Wim De, Jean-Marie Sleewaegen filed Critical Septentrio Nv
Priority to ES08803800T priority Critical patent/ES2394849T3/en
Priority to EP08803800A priority patent/EP2188907B1/en
Publication of WO2009030772A2 publication Critical patent/WO2009030772A2/en
Publication of WO2009030772A3 publication Critical patent/WO2009030772A3/en

Links

Classifications

    • 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
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • 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
    • G01S19/22—Multipath-related issues
    • 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
    • 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
    • H04B1/7073—Synchronisation aspects
    • H04B1/7085—Synchronisation aspects using a code tracking loop, e.g. a delay-locked loop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70715—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation with application-specific features

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)
  • Noise Elimination (AREA)

Abstract

The present invention is related to a method and circuit for aligning a local spreading code with a spreading code in a received signal, said local spreading code and received spreading code comprising a plurality of chipping pulses having at least one polarity change within each chipping pulse and being modulated with a pseudo-random noise code, said method comprising the steps of: - generating a selection pulse modulated with said pseudo-random noise code, said pulse being indicative of one of said polarity changes within a chipping pulse of said local spreading code, said polarity change not coinciding with the start of said chipping pulse, and wherein said selection pulse is active in a region around said polarity change that does not overlap with other polarity changes, and inactive elsewhere; - correlating said modulated selection pulse with said received signal; - using the result of said correlating step for aligning said spreading code in said received signal and said local spreading code.
PCT/EP2008/061831 2007-09-07 2008-09-05 Method and device for multipath mitigation WO2009030772A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ES08803800T ES2394849T3 (en) 2007-09-07 2008-09-05 Procedure and device for mitigation of multipath
EP08803800A EP2188907B1 (en) 2007-09-07 2008-09-05 Method and device for multipath mitigation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP07115958A EP2034617A1 (en) 2007-09-07 2007-09-07 Device and method for multipath mitigation
EP07115958.6 2007-09-07

Publications (2)

Publication Number Publication Date
WO2009030772A2 WO2009030772A2 (en) 2009-03-12
WO2009030772A3 true WO2009030772A3 (en) 2009-05-28

Family

ID=38935817

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/061831 WO2009030772A2 (en) 2007-09-07 2008-09-05 Method and device for multipath mitigation

Country Status (3)

Country Link
EP (2) EP2034617A1 (en)
ES (1) ES2394849T3 (en)
WO (1) WO2009030772A2 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9191061B2 (en) 2014-01-10 2015-11-17 Deere & Company Method and receiver for receiving a composite signal
CN112305569B (en) * 2020-09-30 2023-08-29 北京空间飞行器总体设计部 Method for testing time domain waveform distortion degree of navigation signal
US11742883B2 (en) 2020-10-16 2023-08-29 Deere & Company Adaptive narrowband interference rejection for satellite navigation receiver
US11671133B2 (en) 2020-10-16 2023-06-06 Deere & Company Adaptive narrowband and wideband interference rejection for satellite navigation receiver
US11750274B2 (en) 2020-10-16 2023-09-05 Deere & Company Adaptive narrowband interference rejection for satellite navigation receiver
US12153143B2 (en) 2022-02-18 2024-11-26 Deere & Company Multi-constellation, multi-frequency GNSS system for interference mitigation
US12066551B2 (en) 2022-02-18 2024-08-20 Deere & Company Multi-constellation, multi-frequency GNSS system for interference mitigation

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6493378B1 (en) * 1998-01-06 2002-12-10 Topcon Gps Llc Methods and apparatuses for reducing multipath errors in the demodulation of pseudo-random coded signals
US6744404B1 (en) * 2003-07-09 2004-06-01 Csi Wireless Inc. Unbiased code phase estimator for mitigating multipath in GPS

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5390207A (en) * 1990-11-28 1995-02-14 Novatel Communications Ltd. Pseudorandom noise ranging receiver which compensates for multipath distortion by dynamically adjusting the time delay spacing between early and late correlators
US7738536B2 (en) * 2003-04-15 2010-06-15 Novatel Inc. Apparatus for and method of making pulse-shape measurements

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6493378B1 (en) * 1998-01-06 2002-12-10 Topcon Gps Llc Methods and apparatuses for reducing multipath errors in the demodulation of pseudo-random coded signals
US6744404B1 (en) * 2003-07-09 2004-06-01 Csi Wireless Inc. Unbiased code phase estimator for mitigating multipath in GPS

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DOVIS F, LO PRESTI L, FANTINO M, MULASSANO P: "Comparative Analysis of Optimized Signals for Satellite Navigation Systems", GRUPPO TELECOMUNICAZIONI E TECNOLOGIE DELL'INFORMAZIONE - GTTI, MEETING 2007, 18 June 2007 (2007-06-18) - 20 June 2007 (2007-06-20), Rome, Italy, XP002518906, Retrieved from the Internet <URL:http://www.gtti.it/GTTI07/papers/Lopresti_GTTI_2007_Optimized_Signals.pdf> [retrieved on 20090312] *

Also Published As

Publication number Publication date
EP2188907A2 (en) 2010-05-26
ES2394849T3 (en) 2013-02-06
EP2188907B1 (en) 2012-08-29
EP2034617A1 (en) 2009-03-11
WO2009030772A2 (en) 2009-03-12

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