Position location system and method
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United States of America Patent
Stats
-
Mar 16, 1999
Grant Date -
N/A
app pub date -
Dec 15, 1995
filing date -
Dec 15, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A position location system includes multiple base stations spaced over a region. A portable unit within the region transmits a locating signal which is received by the base stations. The base stations report amplitude, phase and time data related to the locating signal to a control station. The control station includes a processor and memory that combine the data from all of the participating base stations to directly compute an optimal estimate of the location of the portable unit. The control station generates an ambiguity function based upon the probability that the portable unit is located at a particular position. By optimizing the ambiguity function, the error in the computation is minimized to produce an accurate position estimate.
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- Non-US Classification not provided for expired patents
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- Citation Ranking not provided for expired patents
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