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1. US20120314733 - METHOD OF ESTIMATING PSEUDORANGE, GNSS RECEIVING APPARATUS, AND MOBILE TERMINAL

Office
États-Unis d'Amérique
Numéro de la demande 13581255
Date de la demande 23.02.2011
Numéro de publication 20120314733
Date de publication 13.12.2012
Type de publication A1
CIB
H04B 1/707
HÉLECTRICITÉ
04TECHNIQUE DE LA COMMUNICATION ÉLECTRIQUE
BTRANSMISSION
1Détails des systèmes de transmission, non couverts par l'un des groupes H04B3/-H04B13/124; Détails des systèmes de transmission non caractérisés par le milieu utilisé pour la transmission
69Techniques d'étalement de spectre
707utilisant une modulation par séquence directe
CPC
G01S 19/428
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
39the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
42Determining position
428using multipath or indirect path propagation signals in position determination
G01S 19/22
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
22Multipath-related issues
Déposants Tominaga Takaki
Yasumoto Takuji
Inventeurs Tominaga Takaki
Yasumoto Takuji
Données relatives à la priorité 2010-042853 26.02.2010 JP
Titre
(EN) METHOD OF ESTIMATING PSEUDORANGE, GNSS RECEIVING APPARATUS, AND MOBILE TERMINAL
Abrégé
(EN)

A pseudorange is estimately calculated in high accuracy without being influenced by multipath. Multipath is determined based on a C/No and a difference value DV(iv) that is a difference value between a time change of an observed pseudorange and a delta range (S101-S103). If multipath does not exist (S104: NO), an error variance of the pseudorange and an error variance of the delta range are set to fixed values, and a weight coefficient is determined (S105). If multipath exists (S104: YES), a variance of the difference value and the variance of the delta range are calculated (S106), a variance of the pseudorange is calculated (S107), and the weight coefficient is determined based on the calculated variances of the pseudorange and the delta range (S108). Further, the pseudorange is estimately calculated by a weighted hatch filter through using the determined weight coefficient (S109).


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