PROBLEM TO BE SOLVED: To provide a method for rapidly and accurately retrieving an offset signal corresponding to a transmission leakage signal in a radio transceiver.
SOLUTION: This method includes respective steps of: (a) setting a transmission leakage signal on a vector phase-plane relative to magnitude and phase; (b) dividing the vector phase-plane into a plurality of regions to determine a plurality of sample points on a divided region basis; (c) sequentially detecting a vector from any one sample point selected from the plurality of sample points to another sample point for each region; (d) calculating a gradient of a resultant vector relative to the detected vector; (e) checking if the resultant vector has converged into a current region; (f) repeating the step (b) through the step (e) at least once, when the current region includes one or more descent gradients converging into the inside thereof; and (g) determining an offset signal corresponding to the transmission leakage signal using a maximum descent gradient among the gradients detected in the step (f).
COPYRIGHT: (C)2011,JPO&INPIT