| 摘要 |
PROBLEM TO BE SOLVED: To smooth variation of a positioning result accompanying a movement and to achieve accuracy improvement of the positioning result. SOLUTION: A positioning calculating section 16 of an on-vehicle GPS positioning device 10 outputs a position vector P(t) determined by a false range from a plurality of GPS satellites 12 and a velocity vector V(t) of the moving velocity calculated based on Doppler frequency to a positioning reliability calculating section 22. Next, the positioning reliability calculating section 22 determines reliability S(t), and outputs it to a time constant calculating section 24. The time constant calculating section 24 outputs time constant T(t) to a correction position calculating section 26. The correction position calculating section 26 acquires the position vector P(t) and time constant T(t), and outputs a corrected user position P'(t). COPYRIGHT: (C)2007,JPO&INPIT
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