| 摘要 |
PROBLEM TO BE SOLVED: To reduce an influence of multipath, and to improve positioning accuracy. SOLUTION: This GNSS (Global Navigation Satellite System) receiving device for performing positioning operation, based on a positioning signal transmitted from a GNSS satellite has: a pseudo distance operation part for determining a pseudo distance between the GNSS satellite and the GNSS receiving device by using a cord included in the positioning signal; a route difference changing rate estimation part for estimating a changing rate of a route difference between a direct wave and a reflected wave from the GNSS satellite; a time constant setting part for determining a time constant of a filter corresponding to the changing rate of the route difference estimated by the route difference changing rate estimation part, and setting the time constant; and a noise removal part for filtering the pseudo distance determined by the pseudo distance operation part with a phase variation of a carrier wave, by the time constant set by the time constant setting part. COPYRIGHT: (C)2010,JPO&INPIT |
