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

摘要

The present invention relates to a correlation coefficient calculation method when an IP-to-calibration of the mobile terminal.; The present invention includes the steps of: in the absence of interference conditions, calculates the DC offset properties of the RF signal received by the mobile communication terminal; In the state in which the interference of a predetermined size, and determining a slope characteristic between a correlation coefficient and a DC level of the RF signal received by the mobile communication terminal; Further included is the step of calculating a characteristic coefficient for the DC offset properties of the received signal using the determined characteristic slope.; Therefore, when the present invention is to perform the IP2 (Second order Intercept Point) calibration (Calibration) for the mobile communication terminal using the RF chip having a receiving end is configured as a kind of device similar to the device and (Direct Conversion Receiver) DCR, by using the characteristic slope between the correlation coefficient and the received signal (I and Q signals) DC level at which the interference state calculating a correlation coefficient for correcting the DC component of the received signal (I and Q signals), the interference wave generation and it is necessary to install equipment to monitor the received signal (I and Q signals) of the terminal is additionally possible to simplify the IP2 calibration by simple software without, there is an effect of shortening the time required for IP2 calibration.