Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
April 24, 2007
Patent Application Number
10840353
Date Filed
May 7, 2004
Patent Primary Examiner
Patent abstract
A system and method for performing distance measurement using wireless signals. A time of flight calculation is enabled by an interrogating device that transmits an interrogation signal to a responding device, which returns a synchronized signal back to the interrogating device. The wireless signals between the interrogating device and the receiving device have a harmonic relationship. In one embodiment, a time shift of a received signal relative to a transmitted interrogation signal is determined based on a comparison of a first reference point on a signal representative of the transmitted interrogation signal and a second reference point on a signal representative of the received signal.
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