CFO CANCELLATION METHOD IN BI-DIRECTIONAL CHIRP SIGNAL

摘要

The present invention relates to a carrier frequency offset cancellation method in a bi-directional chirp signal, comprises a step of executing a dechirping process which converts a received-linear chirp signal into a sine wave; a step of estimating the arrival time of the converted signal; and a step of cancelling carrier frequency offset by subtracting an arrival time estimation result from the arrival time estimation result of a lower chirp signal, and cancels the carrier frequency offset of the chirp signal by using a correlation between the bi-directional signals without a compensator or an estimator. [Reference numerals] (110) Executing a dechirping process which converts a received-linear chirp signal into a sine wave;(120) Estimating the arrival time of the converted signal;(130) Cancelling carrier frequency offset by subtracting an arrival time estimation result of an upper chirp signal from the arrival time estimation result of a lower chirp signal among the arrival time estimation results;(AA) Start;(BB) End