Device for measuring a position of a mobile station
First Claim
1. A device for measuring a position of a mobile station, comprising:
- first measuring means for measuring the position of the mobile station based on observed data including a carrier phase of signals from satellites using a one-epoch measuring method in which only the observed data is used, independently epoch by epoch, said one-epoch measuring method performing measuring without inheriting an integer ambiguity or an error covariance from the previous epoch;
second measuring means for measuring the position of the mobile station using a previous determination result of the position of the mobile station and speed information representative of a speed of the mobile station;
third measuring means for measuring the position of the mobile station using solutions of variables derived from previous determination results of the first or second measuring means; and
controlling means for selecting one of the respective measuring means which is to execute a respective measuring process as the selected measuring means; and
reliability calculating means for calculating reliability of the measurement result for the selected measuring means,wherein when the calculated reliability of the measurement result of the selected measuring means is lower than a predetermined reference value, the controlling means selects another measuring means as the selected measuring unit, the another measuring means executing a respective measuring process as the selected measuring means.
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Accused Products
Abstract
A device for measuring a position of a mobile station according to the present invention comprises: first measuring means for measuring the position of the mobile station based on observed data of signals from satellites using a one-epoch measuring method; second measuring means for measuring the position of the mobile station using previous determination result of the position of the mobile station and speed information representative of a speed of the mobile station; third measuring means for measuring the position of the mobile station using solutions of variables derived from previous determination results of the first or second measuring means; and controlling means 60 for selecting one of the respective measuring means which is to execute its measuring process; wherein if reliability of the determination result of the selected measuring means is lower than a predetermined reference value, the controlling means selects another measuring means to make it execute its measuring process.
5 Citations
10 Claims
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1. A device for measuring a position of a mobile station, comprising:
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first measuring means for measuring the position of the mobile station based on observed data including a carrier phase of signals from satellites using a one-epoch measuring method in which only the observed data is used, independently epoch by epoch, said one-epoch measuring method performing measuring without inheriting an integer ambiguity or an error covariance from the previous epoch; second measuring means for measuring the position of the mobile station using a previous determination result of the position of the mobile station and speed information representative of a speed of the mobile station; third measuring means for measuring the position of the mobile station using solutions of variables derived from previous determination results of the first or second measuring means; and controlling means for selecting one of the respective measuring means which is to execute a respective measuring process as the selected measuring means; and reliability calculating means for calculating reliability of the measurement result for the selected measuring means, wherein when the calculated reliability of the measurement result of the selected measuring means is lower than a predetermined reference value, the controlling means selects another measuring means as the selected measuring unit, the another measuring means executing a respective measuring process as the selected measuring means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A device for measuring a position of a mobile station, comprising:
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a first measuring unit that measures the position of the mobile station based on observed data including a carrier phase of signals from satellites using a one-epoch measuring method in which only the observed data is used, independently epoch by epoch, said one-epoch measuring method performing measuring without inheriting an integer ambiguity or an error covariance from the previous epoch; a second measuring unit that measures the position of the mobile station using a previous determination result of the position of the mobile station and speed information representative of a speed of the mobile station; a third measuring unit that measures the position of the mobile station using solutions of variables derived from previous determination results of the first or second measuring units; and a controlling unit, implemented by a processing device, that selects one of the respective measuring units which is to execute a respective measuring process as the selected measuring unit; and reliability calculating unit that calculates reliability of the measurement result for the selected measuring unit, wherein when the calculated reliability of the measurement result of the selected measuring unit is lower than a predetermined reference value, the controlling unit selects another measuring unit as the selected measuring unit, the another measuring unit executing a respective measuring process as the selected measuring unit.
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10. A method for measuring a position of a mobile station, comprising:
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a first step of measuring the position of the mobile station based on observed data including a carrier phase of signals from satellites using a one-epoch measuring method in which only the observed data is used, independently epoch by epoch, said one-epoch measuring method performing measuring without inheriting an integer ambiguity or an error covariance from the previous epoch; a second step of measuring the position of the mobile station using a previous determination result of the position of the mobile station and speed information representative of a speed of the mobile station; a third step of measuring the position of the mobile station using solutions of variables derived from previous determination results of the first or second steps of measuring; and selecting, using a controlling unit implemented by a processing device, one of the respective measuring steps which is to execute a respective measuring process as the selected measuring step; and calculating reliability of the measurement result for the selected measuring step, wherein when the calculated reliability of the measurement result of the selected measuring step is lower than a predetermined reference value, the selecting step selects another measuring step as the selected measuring step, the another measuring step executing a respective measuring process as the selected measuring step.
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Specification