Method of determining the position of a target using transmitters of opportunity
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United States of America Patent
Stats
-
Dec 26, 2006
Grant Date -
Mar 17, 2005
app pub date -
Jun 27, 2002
filing date -
Aug 3, 2001
priority date (Note) -
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status (Latency Note)
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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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