Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2006-12-26
2006-12-26
Gelin, Jean (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S456100, C455S456500, C342S357490, C342S450000
Reexamination Certificate
active
07155240
ABSTRACT:
A method of determining the position of a target comprising the steps of: providing a transmitter or a plurality of transmitters to transmit a signal to the target, providing a receiver or a plurality of receivers to receive signals reflected from said target. Determining the time of arrival information of said reflected signal at the or each receiver; using information pertaining to the position of the or each receiver and/or the or each transmitter and with the information obtained determining the target position. Preferably the signal includes a modulated or coded portion unique to the transmitter; and said signal portion is associated with the or each particular transmitter by virtue of said signal portion. The signal maybe a mobile phone transmission, DAB, digital TV, digital Radio or digital satellite transmissions.
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Atkinson Simon John
Baker Adam Alexander
Rickett Bryan Stephen
Smith Christopher Nigel
Weedon Robert John
Afshar Kamaran
Gelin Jean
Roke Manor Research Limited
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