GPS RECEIVER

PROBLEM TO BE SOLVED: To provide a GPS receiver capable of quickly and properly performing position measuring calculation even in spite of poor reception environment. SOLUTION: This receiver is provided with a navigation data memory 18 storing whole demodulated navigation data, a clock part 26 outpu...

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Bibliographic Details
Main Authors KAWAZOE TOSHIHIRO, OGASA YOSHIHARU, SEKI MICHIHIKO
Format Patent
LanguageEnglish
Published 11.05.1999
Edition6
Subjects
ANALOGOUS ARRANGEMENTS USING OTHER WAVES
DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES
LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES
MEASURING
PHYSICS
RADIO DIRECTION-FINDING
RADIO NAVIGATION
TESTING
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Summary:PROBLEM TO BE SOLVED: To provide a GPS receiver capable of quickly and properly performing position measuring calculation even in spite of poor reception environment. SOLUTION: This receiver is provided with a navigation data memory 18 storing whole demodulated navigation data, a clock part 26 outputting count signals indicating the present time and a satellite transmission time predictor 20 which compares a part of demodulated navigation data from a currently receiving satellite signals with a navigation data demodulator 16, detects the pit position of the currently receiving one and predicts the time data in the navigation data updated at every 6 seconds from the currently received one by using the pit position and the count signals and calculates the satellite prediction time when the stored navigation data in hot start (in the case track data in two hours is held) has not passed for two hours and is not updated. A position measuring operation part 22 obtains the position data of the user position by using the satellite prediction time in position measuring calculation.
Bibliography:Application Number: JP19970289639