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1. WO2000014566 - ACCURATE RANGE AND RANGE RATE DETERMINATION IN A SATELLITE COMMUNICATIONS SYSTEM

Publication Number WO/2000/014566
Publication Date 16.03.2000
International Application No. PCT/US1999/020586
International Filing Date 08.09.1999
Chapter 2 Demand Filed 04.04.2000
IPC
G01S 5/12 2006.01
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
5Position-fixing by co-ordinating two or more direction or position-line determinations; Position-fixing by co-ordinating two or more distance determinations
02using radio waves
12by co-ordinating position lines of different shape, e.g. hyperbolic, circular, elliptical or radial
CPC
G01S 19/00
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
G01S 19/38
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
38Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
G01S 5/12
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
5Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
02using radio waves
12by co-ordinating position lines of different shape, e.g. hyperbolic, circular, elliptical, radial
H04B 7/1855
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
7Radio transmission systems, i.e. using radiation field
14Relay systems
15Active relay systems
185Space-based or airborne stations; ; Stations for satellite systems
1853Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
18545Arrangements for managing station mobility, i.e. for station registration or localisation
18547for geolocalisation of a station
1855using a telephonic control signal, e.g. propagation delay variation, Doppler frequency variation, power variation, beam identification
Applicants
  • QUALCOMM INCORPORATED [US]/[US]
Inventors
  • DAI, Jin
  • LEVANON, Nadav
  • AMES, Bill
  • VICTOR, Ed
  • DETERMAN, Jim
Agents
  • OGROD, Gregory, D.
Priority Data
09/150,50009.09.1998US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) ACCURATE RANGE AND RANGE RATE DETERMINATION IN A SATELLITE COMMUNICATIONS SYSTEM
(FR) DETERMINATION PRECISE DE LA DISTANCE ET DE LA VARIATION DE DISTANCE DANS UN SYSTEME DE COMMUNICATION PAR SATELLITE
Abstract
(EN)
The present invention is a system and method for accurately determining the distance (range and range rate) between one or more satellites (116, 118) and a user terminal (124, 126) in order to determine the location of the user terminal (124, 126). When one satellite is available, the present invention determines the range (516) and range rate (516) based on the Doppler frequency shift (504) between the satellite (116, 118) and the user terminal (124, 126), the round trip delay (510) from the satellite (116, 118) to the user terminal (124, 126) and back via a satellite to a gateway (120, 122), the Doppler frequency shift (512) between the satellite (116, 118) and the gateway (120, 122), and the timestamps of the measurements (506, 514). When a second satellite is available, the present invention determines the range (610) and range rate (610) between the second satellite and the user terminal (124, 126) based on the round trip delay, the Doppler frequency shift between the second satellite and the user terminal (124, 126), and the difference in arrival times (604) at the user terminal (124, 126) of the signals from the satellites (116, 118).
(FR)
La présente invention concerne un système et un procédé de détermination précise de la distance (distance et variation de distance), entre un ou plusieurs satellites (116, 118) et un terminal utilisateur (124, 126), ces mesures pouvant s'utiliser pour déterminer la localisation du terminal (124, 126) utilisateur. Lorsqu'un satellite est disponible, la présente invention permet d'en déterminer la distance (516) et la variation de distance (516) sur la base du changement (504) de fréquence Doppler entre le satellite (116, 118) et le terminal (124, 126) utilisateur; du temps de transmission aller-retour (510) du satellite (116, 118) vers le terminal (124, 126) utilisateur et le retour via un satellite vers une passerelle (120, 122); du changement (512) de fréquence Doppler entre le satellite (116, 118) et la passerelle (120, 122); et des horodateurs des mesures (506, 514). Lorsqu'un deuxième satellite est disponible, la présente invention permet de déterminer la distance (610) et la variation de distance (610) entre le deuxième satellite et le terminal (124, 126) utilisateur sur la base du temps de transmission aller-retour; du changement de fréquence Doppler entre le deuxième satellite et le terminal (124, 126) utilisateur; et de la différence entre les temps (604) d'arrivée au terminal (124, 126) utilisateur des signaux provenant des satellites (116, 118).
Also published as
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