Systems and methods for positioning using multipath signals
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United States of America Patent
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Mar 16, 2010
Grant Date -
Aug 21, 2008
app pub date -
Jan 19, 2006
filing date -
Jan 19, 2005
priority date (Note) -
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Abstract
A signal processing technique for RF active, passive, or aided localization approaches that utilizes multipath signals as additional measurements with a filter or estimator, e.g., a nonlinear filter. The filter uses indirect and direct path measurements or any other available signals to build parametric models of observable indirect paths. If one or more direct path measurements are subsequently lost (e.g., due to obstruction), the filter maintains an estimate of the position of the person or object of interest using indirect path measurements.
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