| 摘要 |
PROBLEM TO BE SOLVED: To accurately estimate the position of a moving body by receiving a wave that the moving body transmits under an environment affected by a multi-path. SOLUTION: The system comprises tracking processors 22-1 and 22-2 for selecting a first and a second phase difference from a plurality of phase differences of reception waves, maintaining the trace based on them and calculating a smoothed value for selecting a true phase difference by a tracking process from a plurality of reception wave phase differences with difference integer bias in the phase difference between reception waves obtained by receiving the wave from the object with a plurality of receivers, and estimating the position of the object. The system also comprises a physical quantity calculator 23 calculating physical quantity which is different from the phase difference and indicating motion state of the object from the smoothed value calculated by the tracking processors 22-1 and 22-2, and a trace exchanger 24 for exchanging traces based on the first and the second phase differences on the basis of continuity of the physical quantity calculated by the physical quantity calculator 23. COPYRIGHT: (C)2006,JPO&NCIPI
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