GNSS POSITIONING USING PRESSURE SENSORS
First Claim
Patent Images
1. A navigation receiver, comprising:
- a pressure sensor input;
circuitry coupled to the pressure sensor input; and
wherein the circuitry is configured to use information from the pressure sensor input to improve a position fix.
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Abstract
Systems, methods and devices for improving the accuracy of GNSS data are provided. Specifically, embodiments of the invention can advantageously use sensor input to improve the accuracy of position fixes. The use of physical sensors in navigation systems is deemed particularly advantageous, especially where altitude data derived from the pressure sensor is calibrated with and/or blended with GNSS altitude data.
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Citations
19 Claims
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1. A navigation receiver, comprising:
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a pressure sensor input; circuitry coupled to the pressure sensor input; and wherein the circuitry is configured to use information from the pressure sensor input to improve a position fix. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for improvement of GNSS positioning, comprising:
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receiving a GNSS measurement; deriving a first altitude from the GNSS measurement; deriving a second altitude from a pressure sensor input corresponding approximately in time to the GNSS measurement; and combining the first and second altitude measurements to obtain a blended altitude measurement. - View Dependent Claims (9, 10, 11)
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12. A portable navigation system, comprising:
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a GNSS sensor; a pressure sensor; and a microprocessor configured to use input derived from the GNSS sensor and the pressure sensor to provide a map location without using map-matching. - View Dependent Claims (13, 14, 15)
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16. A portable vehicle navigation system, comprising:
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a GNSS sensor; a pressure sensor; and a microprocessor configured to use input derived from the GNSS sensor and the pressure sensor to provide a map location; and wherein the portable navigation system can differentiate between two roads in a stacked road condition. - View Dependent Claims (17, 18, 19)
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Specification