Method for improved location determination accuracy using filtered and unfiltered ranging signals
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United States of America Patent
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Apr 14, 2009
Grant Date -
Sep 21, 2006
app pub date -
Mar 17, 2005
filing date -
Mar 17, 2005
priority date (Note) -
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Abstract
A method for selecting a location determination solution from a set of possible location determination solutions generated from filtered, unfiltered, and loosely filtered ranging signals. The solution is computed using a first algorithm and filtered ranging signals to obtain a filtered location determination solution. Additional location determination solutions are computed using a second algorithm with unfiltered ranging signals to obtain one or more unfiltered location determination solutions. Further additional location determination solutions may be computed using a third algorithm with loosely filtered ranging signals to obtain one or more loosely filtered location determination solutions. A final location determination solution is chosen from the set of filtered location determination solution, unfiltered location determination solutions, and loosely filtered location determination solutions via an optimizing metric, M.
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