Method and apparatus for location estimation
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United States of America Patent
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Oct 29, 2002
Grant Date -
Sep 5, 2002
app pub date -
Jan 5, 2001
filing date -
Jan 5, 2001
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A system for locating a number of devices (112-130) by measuring signals transmitted between known location devices (112-118, 134-138, 214-218, 224-228) and unknown location devices (120-130, 222), and signals transmitted between pairs of unknown location devices (120-130,222), entering signal measurements into a graph function that includes a number of first sub-expressions, a number of which include signal measurement prediction sub-expressions, and have extrema when a predicted signal measurement is equal to an actual signal measurement, and optimizing the graph function.
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