Unwrapping and prediction of distance and velocity measurements using carrier signals
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United States of America Patent
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Apr 4, 2017
Grant Date -
Dec 3, 2015
app pub date -
Jun 2, 2014
filing date -
Jun 2, 2014
priority date (Note) -
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Abstract
Systems and methods for performing distance and velocity measurements, such as by using carrier signals, are disclosed. A measurement method may include transmitting a first signal from an originator device to a transponder device and determining a carrier phase of the first signal at the transponder device. The measurement method may also include transmitting a second signal from the transponder device to the originator device and determining a carrier phase of the second signal at the originator device. The measurement method may include estimating a relative distance between the originator device and the transponder device using the carrier phase of the first carrier signal, the carrier phase of the second carrier signal. The method may also include estimating the relative distance using a frequency difference. The method may include using an adjusted relative distance to determine a total distance between the originator device and the transponder device.
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