Measuring distance using wireless communication
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United States of America Patent
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Apr 7, 2009
Grant Date -
Sep 7, 2006
app pub date -
Feb 21, 2006
filing date -
Aug 21, 2003
priority date (Note) -
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Abstract
A method of estimating the distance between a first wireless communication terminal and a second wireless communication terminal includes: receiving a signal at the first terminal, processing the received signal including performing a demodulation operation to produce a demodulated signal; and resolving the demodulated signal into a plurality of components corresponding to different path length components included in the received signal; identifying which of the resolved components corresponds to a shortest path length; and for the identified component, computing a time of travel from the second terminal to the first terminal.
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