APPARATUS FOR CALIBRATING IN ARRARY ANTENNA SYSTEM AND METHOD THEREOF

摘要

An apparatus for calibrating an error in an array antenna system according to an embodiment of the present invention, which is an apparatus for calibrating an error in an array transmission antenna system having a plurality of array antennas, comprises: a calibration signal generator for generating an error calibration signal as a single frequency signal in an area which does not interfere with a passband of a transmitted signal; an array RF transmitter for upwardly converting the transmitted signal into an RF band to transmit the converted signal to the plurality of array antennas; an error calibration estimator for correlating the error calibration signal and the receiving single frequency signal received by passing through the array RF transmitter to estimate a transfer function of the array RF transmitter and extract a filter coefficient by using the estimated transfer function; and a complex filter for calibrating an error of the transmitted signal by applying the filter coefficient and outputting the calibrated transmitted signal to the array RF transmitter. The apparatus of the present invention can improve the accuracy of error calibration by using the single frequency signal as the error calibration signal.