Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2011-01-25
2011-01-25
Phan, Huy (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S404200, C455S456500, C455S456600, C455S403000, C455S422100
Reexamination Certificate
active
07877100
ABSTRACT:
A position determination system and apparatus for utilizing a network of cellular base stations to determine position of a mobile station includes taking a plurality of statistically independent data measurements of the pilot signals from the base stations. Each of the data measurements includes an earliest time of arrival, providing multiple independent measurements for each of the pilot signals. For each cellular base station, a representative measurement is calculated responsive to the independent measurements, which is used to determine position of the mobile station using an AFLT algorithm and/or in conjunction with a GPS algorithm. In some embodiments, the data measurements for each pilot signal further include an RMSE estimate and time of measurement for each time of arrival, and an energy measurement for all resolvable paths. If the mobile station comprises a cell phone, a cell search list and a GPS search list may be provided by a cell base station.
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Amerga Messay
Bhatia Ashok
Fernandez-Corbaton Ivan
Rick Roland R.
Ristic Borislav
Mays Andrea L.
Phan Huy
Qualcomm Incorporated
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