Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2003-05-14
2011-11-01
Eng, George (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S456500, C455S063400, C342S386000, C342S419000, C342S147000
Reexamination Certificate
active
08050687
ABSTRACT:
A method of calculating the position or state of motion of one or more terminals is proposed in which each has a receiver capable of making measurements of signals received from one or more transmission sources for use in calculating the unknown position or state of motion of the or each terminal. At least one transmission source has a known directional transmission pattern, and the bearing from one of the receivers of the or each of the transmission source having a known directional transmission pattern is estimated. Weights are assigned to the measurements made by the one receiver, the weights being calculated from the bearing or bearings and the known directional transmission pattern of the transmission sources.
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Caffery et al, “Overview of Radiolocation in CDMA Cellular Systems”, Apr. 1998, pp. 38-45.
Brice James Paul
Duffett-Smith Peter James
Graube Guy Albert
MacNaughtan Malcolm David
Scott Craig Andrew
Cambridge Positioning Systems Limited
Eng George
Kim Wesley
Roylance Abrams Berdo & Goodman LLP
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