APPARATUS AND METHOD FOR ENVELOPING TRACKING CALIBRATION

摘要

Provided are an apparatus and a method for correcting envelope tracking, which are to be used in wireless communications. The apparatus includes a transmission signal path configured to deliver a transmission signal to an antenna, and an envelope signal path configured to supply an envelope signal through an envelope tracking power amplifier. In addition, the apparatus includes a controller that transmits a normal envelope signal generated in normal operation mode and measures a first adjacent channel leakage ratio (ACLR) corresponding to the normal envelope signal. The controller also transmits a comparative envelope signal generated in comparative operation mode and measures a second ACLR corresponding to the comparative envelope signal. The controller is configured to calculate time misalignment between the transmission signal path and the envelope signal path based on a difference between the first ACLR and the second ACLR.