Title:
POSITIONING DEVICE USING GPS SATELLITE
Document Type and Number:
Japanese Patent JP3656144
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To reduce a positioning error caused by an abnormal electric wave of a mulati-pass or the like by removing a GPS satellite having a large change rate caused by switching reception of a receiving means from rectilinear propa gating electric wave receiving from GPS(Global Positioning System) to reflected wave receiving from an index of positioning calculation.
SOLUTION: An electric wave sent from each satellite of GAS is received by a GPS receiver 11 through a receiving antenna 10, and information such as functions showing the track of a satellite, time and so on is demodulated by a GPS demodulator 12 to be input to a GPS information processing unit 16. The unit 16 comprises a CPU 16, a RAM 16b, a ROM 16c, an I/O port 16d, an A/D converter 163, a timer 16f, an interrupt control circuit 16g and a clock 16h. When the change rate of a doppler shift of an electric wave from a satellite exceeds a first threshold 30Hz/s, the satellite is not referred in positional operation and speed operation similarly to the case of a tracking failure.
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Inventors:
Yoshihisa Suwa
Seiji Ishikawa
Tomohiro Yamamoto
Takeshi Ito
Tomio Hota
Seiji Ishikawa
Tomohiro Yamamoto
Takeshi Ito
Tomio Hota
Application Number:
JP3357396A
Publication Date:
June 08, 2005
Filing Date:
February 21, 1996
Export Citation:
Assignee:
Aisin Seiki Co., Ltd.
International Classes:
G01S1/00; G01S19/22; G01C21/00; G01S19/28; G01S19/49; (IPC1-7): G01S5/14; G01C21/00
Domestic Patent References:
| JP8043515A | ||||
| JP7332990A | ||||
| JP666916A | ||||
| JP429079A |