Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2006-06-27
2006-06-27
D'Agosta, Steve M. (Department: 2683)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S012100, C455S427000, C701S213000, C701S214000, C701S226000, C367S090000, C367S094000, C342S357490, C342S357490
Reexamination Certificate
active
07069021
ABSTRACT:
A method is provided for determining the position of an electronic device by receiving a code modulated signal transmitted by satellites, and position information of the satellites and time data, and by generating local time data. In the method, delta range measurements are taken for at least four different satellites. For each of said at least four satellites, the velocity of the satellite is determined in relation to the positioning receiver. Furthermore, in the method, the delta range measurement results are replaced in an algorithm applying said delta range measurements and velocities to generate reference data for determining the local time data frequency error and the position. The local time data frequency error and the position are determined by searching for the minimum value of said reference data. A system and an electronic device applying the method are also provided.
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