APPARATUS AND METHOD FOR ENVELOPING TRACKING CALIBRATION

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 t...

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Bibliographische Detailangaben
Hauptverfasser:	JOHN ALEX INTERRANTE, YAMING ZHANG, WILLIAM HURLEY, LUP MENG LOH
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Beschreibung
Zusammenfassung:	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.