Location systems and methods
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United States of America Patent
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Nov 1, 2011
Grant Date -
Nov 27, 2003
app pub date -
May 14, 2003
filing date -
May 22, 2002
priority date (Note) -
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status (Latency Note)
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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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