Method and apparatus for detecting excess delay in a communication signal
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United States of America Patent
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Sep 6, 2005
Grant Date -
Mar 20, 2003
app pub date -
Sep 14, 2001
filing date -
Sep 14, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
A method and apparatus of determining a lower bound of an excess delay in a time of arrival measurement of a received signal. Determining the lower bound of an excess delay in a time of arrival measurements includes receiving signals from at least two base stations and determining the time difference of arrival between the received signals from their respective base stations. Then estimating a lower bound of excess delay introduced into the signals received from the base stations based on the time of arrival of the signals from the respective base stations and a known distance between the base stations. The lower bound of excess delay may be used to adjust the estimate of a mobile unit's location based on the time of arrival measurements of the received signals.
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