Navigation data processing with filtering for refined position determination
First Claim
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1. In a communication system, an arrangement for processing position information, comprising:
- a processor arrangement configured and arranged to include a behavior observer block adapted to detect changes in movement in the arrangement and, in response thereto, to generate data indicative of position estimations using a linearized least square algorithm; and
the processor arrangement further configured and arranged to include a time-varying-gain filter adapted to average the generated data indicative of position estimations.
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Abstract
Consistent with one embodiment of the invention, a GPS signal processing system uses a behavior observer to monitor user dynamics and to aid a time-varying-gain filter arranged to perform continuous position and speed estimates. The behavior observer consists of a fast observer and a signal detector. The fast observer tacks user maneuvers. The signal detector compares outputs of the fast observer and the time-varying-gain filter to determine user dynamics and corrects operations of the time-varying-gain filter. Tracking ability is improved without degradation in steady-state position accuracy.
15 Citations
33 Claims
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1. In a communication system, an arrangement for processing position information, comprising:
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a processor arrangement configured and arranged to include a behavior observer block adapted to detect changes in movement in the arrangement and, in response thereto, to generate data indicative of position estimations using a linearized least square algorithm; and the processor arrangement further configured and arranged to include a time-varying-gain filter adapted to average the generated data indicative of position estimations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. In a communication system, an arrangement for processing position information, comprising:
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a processor arrangement configured and arranged to include a behavior observer block adapted to detect changes in movement in the arrangement and, in response thereto, to generate data indicative of position estimations; and the processor arrangement further configured and arranged to include a time-varying-gain filter adapted to average the generated data indicative of position estimations and to yield a relatively small averaging variance, without accounting for dynamics of the arrangement. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. In a communication system, a processing arrangement for processing position information, comprising:
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a satellite selector adapted to process navigation data; a single point solver responsive to the satellite selector and to pseudo-range data and adapted to generate data representing position estimations; a filter arrangement responsive to the data representing position estimations and including a behavior observer and a time-varying-gain filter, the behavior observer adapted to detect changes in movement in the processing arrangement and, in response thereto, to generate data indicative of refined position estimations using a linearized least square algorithm, and the time-varying-gain filter adapted to average the generated data indicative of refined position estimations. - View Dependent Claims (21)
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22. For use in a communication system, a method for processing position information corresponding to the position of a moveable device, comprising:
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detecting changes in movement in the device; in response, generating data indicative of position estimations using a linearized least square algorithm; and using a time-varying-gain algorithm to average the generated data indicative of position estimations. - View Dependent Claims (23, 24, 25, 26)
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27. For use in a communication system, a method for processing position information corresponding to the position of a moveable device, comprising:
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detecting changes in movement in the device; in response, generating data indicative of position estimations; and using a time-varying-gain algorithm to average the generated data indicative of position estimations. - View Dependent Claims (28, 29, 30, 31)
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32. An arrangement for processing position information corresponding to the position of a moveable device, comprising:
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means for detecting changes in movement in the device; means, responsive to the means for detecting, for generating data indicative of position estimations; and means for using a time-varying-gain algorithm to average the generated data indicative of position estimations, without accounting for dynamics of the device.
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33. An arrangement for processing position information corresponding to the position of a moveable device, comprising:
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means for detecting changes in movement in the device; means, responsive to the means for detecting, for generating data indicative of position estimations using a linearized least square algorithm; and means for using a time-varying-gain algorithm to average the generated data indicative of position estimations.
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Specification