DETERMINING AN OBJECT DISTANCE USING RADIO FREQUENCY SIGNALS
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United States of America Patent
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Dec 29, 2016
app pub date -
Jul 2, 2015
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Aug 27, 2014
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An object-tracking system can compute a distance to a target object. During operation, the system can use a radio antenna to receive a first radio signal pattern from a direction of a target object. The system determines a time interval from the received radio signal pattern, and determines a velocity of the local system. The system then computes a distance to the target object based on the time interval and the velocity of the object-tracking device.
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