COEFFICIENT CALCULATION METHOD IN THE SECOND ORDER INTERCEPT POINT CALIBRATION OF A MOBILE COMMUNICATION TERMINAL

摘要

The present invention relates to a method of calculating a correlation coefficient when calibrating IPTO of a mobile communication terminal.;The present invention provides a method for computing the RF offset of an RF signal received by a mobile communication terminal in the absence of interference; Determining a characteristic slope between a DC level and a correlation coefficient of an RF signal received by the mobile communication terminal in the presence of interference; Calculating a characteristic correlation coefficient for the characteristic DC offset of the received RF signal using the determined characteristic slope.;Accordingly, the present invention, when performing a second order intercept point (IP2) calibration for a mobile communication terminal using an RF chip having a receiving end composed of a DCR (Direct Conversion Receiver) device and a similar kind of device, By calculating the correlation coefficient for correcting the DC component of the received signal (I and Q signal) using the characteristic slope between the received signal (I and Q signal) DC level and the correlation coefficient in the state of interference, There is no need to install equipment for generating and monitoring the received signals (I and Q signals) of the terminal. Since the IP2 calibration can be performed simply by software, the time required for IP2 calibration can be shortened.