Distance estimation
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United States of America Patent
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Sep 29, 2009
Grant Date -
Jul 13, 2006
app pub date -
Aug 15, 2005
filing date -
Feb 18, 2003
priority date (Note) -
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Abstract
A method for estimating the distance between a transmitter and a receiver, the transmitter being arranged to transmit a signal as a series of bursts, and the carrier frequency of each burst being set according to a predetermined sequence, the method comprising: forming a first series comprising the measured differences between the phases of successive bursts as received at the receiver; forming a second series comprising estimated differences between the phases of successive bursts as received at a supposed time difference between the transmitter and the receiver; and determining the quality of fit between the first series and the second series.
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