Positioning method, program, positioning device, and...

Details Positioning method, program, positioning device, and... Positioning method, program, positioning device, and...

2011-06-21

2011-06-21

Tarcza, Thomas H (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

C342S357250, C342S357610

Reexamination Certificate

active

07965229

ABSTRACT:
A positioning method includes: capturing a satellite signal from a positioning satellite; predicting a state vector including a position of a positioning device and a velocity of the positioning device based on the satellite signal; predicting a first distance-equivalent value indicating a distance between the positioning satellite and the positioning device; measuring a second distance-equivalent value indicating a distance between the positioning satellite and the positioning device; calculating an observed value indicating a difference between the first distance-equivalent value and the second distance-equivalent value; setting a measurement error for the positioning satellite based on a signal strength of the satellite signal; changing the measurement error based on a capture data indicating a data of capturing of the satellite signal; and correcting the state vector using the observed value, and the changed measurement error.

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Welch, Greg and Bishop, Gary “An Introduction to the Kalman Filter”, Jul. 24, 2006, Department of Computer Science, University of North Carolina.
Butsch, Felix “Radiofrequency interference and GPS: A growing concern”,. Oct. 2002, GPS World.

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