Systems and methods for locating remote terminals in radiocommunication systems
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United States of America Patent
Stats
-
Jul 24, 2001
Grant Date -
N/A
app pub date -
Jan 20, 2000
filing date -
Apr 22, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Emergency call handling may, in the near future, require terminal unit location information to be provided to emergency service centers. Exemplary embodiments of the present invention provide improved techniques for using a system of monitoring or adjunct stations to provide this location information to the emergency service centers. For example, received signal strength measurements in conjunction with path loss models, alone or in conjunction with either time of arrival (TOA) or time difference of arrival (TDOA) techniques can be selectively used to process received signals and provide location information. Techniques for improving timing estimates are also disclosed.
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