One way time of flight distance measurement
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United States of America Patent
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Jul 5, 2016
Grant Date -
Jan 29, 2015
app pub date -
Sep 5, 2014
filing date -
Jan 18, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
Determination of distance and/or position relative to one or more points by transmission of a wideband signal by a first antenna, reception of the transmitted wideband signal by a second antenna and comparison of the time delay between the transmitted and received signals. The first and second antennas are connected to a timer/processor unit. One or more of the first or second antennas is movable to an unknown position to be measured, but maintains connection to the timer/processor through a fixed or known delay communication link. The timer/processor contains a time base for generating the transmitted signal and an offset timer for measuring the time delay of the received signal. The received signal may be processed to determine a start time or leading edge that may resolve RF cycle and modulation bandwidth ambiguities and may allow positive determination of distance much shorter than a wavelength at the operation center frequency.
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