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1. WO2005066650 - SATELLITE DATA ACQUISITION METHOD

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Publication Number WO/2005/066650
Publication Date 21.07.2005
International Application No. PCT/FR2004/002993
International Filing Date 22.11.2004
IPC
G01S 1/00 2006.1
GPHYSICS
01MEASURING; TESTING
SRADIO 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
1Beacons 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
CPC
G01S 19/25
GPHYSICS
01MEASURING; TESTING
SRADIO 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
19Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
01Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
13Receivers
24Acquisition or tracking ; or demodulation; of signals transmitted by the system
25involving aiding data received from a cooperating element, e.g. assisted GPS
G01S 19/29
GPHYSICS
01MEASURING; TESTING
SRADIO 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
19Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
01Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
13Receivers
24Acquisition or tracking ; or demodulation; of signals transmitted by the system
29carrier ; including Doppler,; related
Applicants
  • ALCATEL [FR]/[FR] (AllExceptUS)
  • MONNERAT, Michel [FR]/[FR] (UsOnly)
Inventors
  • MONNERAT, Michel
Agents
  • VIGAND, Régis
Priority Data
031417501.12.2003FR
Publication Language French (fr)
Filing Language French (FR)
Designated States
Title
(EN) SATELLITE DATA ACQUISITION METHOD
(FR) PROCEDE D’ACQUISITION DE DONNEES SATELLITAIRES
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Abstract
(EN) The invention relates to a method for the acquisition of satellite data using a mobile device comprising a radio-navigation satellite (RNSS) receiver (10). The inventive method comprises the following steps, namely: reception by the receiver (10) of a signal S(t) transmitted by a plurality of satellites, said signal corresponding to a sum of signals each sent by a satellite and modulated by a spectrally-spread signal that is characteristic of the satellite; generation of a plurality of local replies RS1, RS2, RS3 that are generated by the receiver (10), each of said replies being the reply from a spectrally-spread signal that is characteristic of a satellite; frequency correction of each of the local replies by compensation of the Doppler effect of each of the satellites; summation of the plurality of corrected replies CD1, CD2 CD3; and determination of correlation function F(t) as a function of the time between the sum of said plurality of corrected replies and the satellite data signal S(t).
(FR) La présente invention concerne un procédé d'acquisition de données satellitaires par un dispositif mobile incluant un récepteur 10 de radionavigation satellitaire RNSS. Ce procédé comporte les étapes suivantes - réception par ledit récepteur 10 d'un signal S(t) émis par une pluralité de satellites, ledit signal correspondant à une somme de signaux envoyés chacun par un satellite et modulés chacun par un signal étalé spectralement et caractéristique dudit satellite, - génération d'une pluralité de répliques locales RS1, RS2, RS3 générées par ledit récepteur 10, chacune desdites répliques étant la réplique d'un signal étalé spectralement et caractéristique d'un satellite, - correction fréquentielle de chacune desdites répliques locales par compensation de l'effet Doppler de chacun desdits satellites, - sommation de ladite pluralité de répliques corrigées CD1, CD2 CD3, - détermination de la fonction F(t) de corrélation en fonction du temps entre la somme de ladite pluralité de répliques corrigées et ledit signal S(t) de données satellitaires.
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