Method and apparatus for measuring displacement of object using multiple frequency signal
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United States of America Patent
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Sep 22, 2020
Grant Date -
Jun 20, 2019
app pub date -
Dec 14, 2018
filing date -
Dec 15, 2017
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Abstract
A method and an apparatus for measuring a displacement of an object according to steps of: dividing a signal into an I signal and a Q signal according to a phase of the signal, wherein the signal is reflected by the object after a transmission signal having a plurality of frequencies is emitted toward the object by the radar measurement system; estimating a direct current (DC) component from an N-tuple information acquired from the I signal and the Q signal; removing the estimated DC component to correct the I signal and the Q signal; and measuring the displacement of the object based on the corrected I signal and Q signal are provided.
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