Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2003-04-17
2010-02-09
Gelin, Jean A (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S456500, C455S456600
Reexamination Certificate
active
07660588
ABSTRACT:
A method and apparatus to utilize a set of measurements (either partial or compete) to improve the accuracy of an initial position estimate for a wireless terminal. The initial position estimate for the terminal is first obtained (e.g., based on a cell-ID or an enhanced cell-ID solution). Measurements are obtained for the terminal. The initial position estimate is then updated with the measurements to obtain a revised position estimate for the terminal. The updating may be performed by (1) deriving a measurement vector based on the initial position estimate and the measurements, (2) forming an observation matrix for the measurements, (3) determining a matrix of weights, (4) deriving a correction vector based on the measurement vector, the observation matrix, and the weight matrix, and (5) updating the initial position estimate with the correction vector.
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Riley Wyatt Thomas
Sheynblat Leonid
Gelin Jean A
Greenhaus Bruce W.
Mays Andrea L.
QUALCOMM Incorporated
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