CA2211340A1 - Procede de reduction autonome des seuils d'acquisition et de poursuite des codes d'etalement de spectre recus en orbite - Google Patents

Procede de reduction autonome des seuils d'acquisition et de poursuite des codes d'etalement de spectre recus en orbite

Info

Publication number
CA2211340A1
CA2211340A1 CA002211340A CA2211340A CA2211340A1 CA 2211340 A1 CA2211340 A1 CA 2211340A1 CA 002211340 A CA002211340 A CA 002211340A CA 2211340 A CA2211340 A CA 2211340A CA 2211340 A1 CA2211340 A1 CA 2211340A1
Authority
CA
Canada
Prior art keywords
code
orbit
spread spectrum
acquisition
loop
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA002211340A
Other languages
English (en)
Other versions
CA2211340C (fr
Inventor
Jean-Luc Issler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Centre National dEtudes Spatiales CNES
Original Assignee
Individual
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
Priority claimed from FR9514031A external-priority patent/FR2741761B1/fr
Application filed by Individual filed Critical Individual
Publication of CA2211340A1 publication Critical patent/CA2211340A1/fr
Application granted granted Critical
Publication of CA2211340C publication Critical patent/CA2211340C/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • H04B1/7073—Synchronisation aspects
    • H04B1/7075—Synchronisation aspects with code phase acquisition
    • H04B1/70755—Setting of lock conditions, e.g. threshold
    • 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
    • G01S19/14—Receivers specially adapted for specific applications
    • 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
    • G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
    • G01S19/26—Acquisition or tracking or demodulation of signals transmitted by the system involving a sensor measurement for aiding acquisition or tracking
    • 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
    • G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
    • G01S19/30—Acquisition or tracking or demodulation of signals transmitted by the system code related
    • 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
    • H04B1/7075—Synchronisation aspects with code phase acquisition
    • H04B1/70751—Synchronisation aspects with code phase acquisition using partial detection
    • H04B1/70753—Partial phase search
    • 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)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé de réduction autonome des seuils d'acquisition et de poursuite des codes d'étalement de spectre reçus en orbite par un récepteur accédant à un navigateur orbital interne ou externe audit récepteur, d'une boucle de phase et une boucle de code. La boucle de code, chargée de la poursuite des codes pseudoaléatoires est "poussée"
par l'aide de vitesse fine, et rattrape l'erreur entre la vitesse réelle et la vitesse calculée. La boucle de code, chargée de l'acquisition des codes pseudoaléatoires, est également "poussée" par l'aide de la vitesse fine, la recherche de la phase du code reçu s'effectuant autour d'une prédiction de phase entretenue par l'aide de vitesse fine provenant du navigateur orbital.
CA002211340A 1995-11-27 1996-11-26 Procede de reduction autonome des seuils d'acquisition et de poursuite des codes d'etalement de spectre recus en orbite Expired - Lifetime CA2211340C (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9514031A FR2741761B1 (fr) 1995-11-27 1995-11-27 Procede de reduction autonome des deuils d'acquisition et de poursuite des codes d'etalement de spectre recus en orbite
FR95/14031 1995-11-27
PCT/FR1996/001870 WO1997020227A1 (fr) 1995-11-27 1996-11-26 Procede de reduction autonome des seuils d'acquisition et de poursuite des codes d'etalement de spectre recus en orbite

Publications (2)

Publication Number Publication Date
CA2211340A1 true CA2211340A1 (fr) 1997-06-05
CA2211340C CA2211340C (fr) 2007-03-13

Family

ID=38007998

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002211340A Expired - Lifetime CA2211340C (fr) 1995-11-27 1996-11-26 Procede de reduction autonome des seuils d'acquisition et de poursuite des codes d'etalement de spectre recus en orbite

Country Status (1)

Country Link
CA (1) CA2211340C (fr)

Also Published As

Publication number Publication date
CA2211340C (fr) 2007-03-13

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Effective date: 20161128