Tunable filter device for spatial positioning systems
First Claim
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1. A device for a spatial positioning system comprising:
- a detector adapted to detect a measurement signal;
a signal processing unit communicably coupled to said detector, said signal processing unit adapted to analyze said measurement signal and determine at least one filter parameter value therefrom, said signal processing unit further comprising a programmable measurement filter adapted to receive and filter said measurement signal based upon said at least one filter parameter value determined by said signal processing unit; and
an output device coupled to said signal processing unit.
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Abstract
A device for spatial positioning systems includes a programmable measurement filter that is dynamically tuned by the device signal processing unit. The signal processing unit analyzes available data including the measurement signal to determine the likelihood that a detected measurement comprises true device movement and adjusts the measurement filter bandwidth accordingly.
29 Citations
30 Claims
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1. A device for a spatial positioning system comprising:
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a detector adapted to detect a measurement signal;
a signal processing unit communicably coupled to said detector, said signal processing unit adapted to analyze said measurement signal and determine at least one filter parameter value therefrom, said signal processing unit further comprising a programmable measurement filter adapted to receive and filter said measurement signal based upon said at least one filter parameter value determined by said signal processing unit; and
an output device coupled to said signal processing unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A device for a spatial positioning system comprising:
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a detector adapted to detect a measurement signal;
a signal processing unit communicably coupled to said detector, said signal processing unit adapted to analyze said measurement signal and determine at least one filter parameter value from said detector;
a storage device located within said signal processing unit for storing said at least one filter parameter value;
a programmable measurement filter adapted to receive and filter said measurement signal based upon said at least one filter parameter value retrieved from said storage device of said signal processing unit; and
an output device coupled to said signal processing unit.
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24. A method of filtering a measurement signal in a device for a spatial positioning system comprising:
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analyzing a measurement signal from a detector of said device;
discriminating whether said measurement signal comprises movement of said device or comprises noise;
determining at least one filter characteristic based upon whether said measurement signal is determined to be noise or device movement;
automatically tuning a programmable measurement filter based upon said at least one filter characteristic; and
filtering said measurement signal using said programmable measurement filter.
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25. A method of filtering a measurement signal in a device for a spatial positioning system comprising:
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providing a detector adapted to detect a measurement signal;
communicably coupling a signal processing unit to said detector;
analyzing said measurement signal to determine at least one filter parameter value;
providing a programmable measurement filter adapted to receive and filter said measurement signal; and
tuning said programmable measurement filter based upon said at least one filter parameter value determined by said signal processing unit. - View Dependent Claims (26, 27, 28, 29, 30)
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Specification