METHOD FOR SELF-CALIBRATING IN A MOBILE TRANSCEIVER

摘要

A self-calibration method in a wireless transceiver is provided to minimize a production cost of a mobile terminal by calibrating a mismatch between an I-channel and a Q-channel and a DC offset without an additional circuit or additional power consumption. A self-calibration method in a wireless transceiver includes the steps of: sequentially generating first and second synchronous phase channel test signals by a predetermined interval at an analog baseband of a transmitting terminal; converts the sequentially generated first and second synchronous phase channel test signals at the analog baseband into first and second wireless frequency band signals by a generation sequence, and applying the converted first and second wireless frequency band signals to a receiving terminal through a test path; converting the applied first and second wireless frequency band signals into an analog baseband signal by a second carrier wave for an orthogonal phase channel and a first carrier wave for the synchronous phase channel, and outputs first and second synchronous phase channel test signals and first and second orthogonal phase channel test signals; calibrating a DC offset characteristic for a synchronous baseband phase channel receiving signal in the analog baseband of the receiving terminal based on an average value of the first and second synchronous channel test signals; and calibrating an orthogonal offset characteristic for the orthogonal phase channel receiving signal in the analog baseband of the receiving terminal based on the average value of the first and second synchronous channel test signals.