Title :
Digital Predistortion using non-stationary windowed sequences for LTE power amplifier linearization
Author :
Aladrén, Leticia ; García-Dùcar, Paloma ; De Mingo, Jesùs ; Carro, Pedro L. ; Sánchez-Pérez, César
Author_Institution :
Aragon Institute of Engineering Research (I3A), University of Zaragoza, 50.018, Spain
Abstract :
Digital PreDistortion (DPD) is a well-known method to reduce nonlinear distortion in RF power amplifiers. We present a study on the performance of this linearization technique using non-stationary windowed training sequences. In a Long Term Evolution uplink transmission, the modulation schemes are adaptive. Thus, the DPD behavior may change decreasing its linearity performance. This effect can be reduced using a suitable training signal, observing improvements in adjacent channel leakage ratio.
Keywords :
Calibration; Chirp; Linearity; Modulation; Nonlinear distortion; Predistortion; Training; Digital Predistortion; LTE; Linearization; Power Amplifier; Training Sequences; Windowing;
Conference_Titel :
Microwave Symposium Digest (MTT), 2012 IEEE MTT-S International
Conference_Location :
Montreal, QC, Canada
Print_ISBN :
978-1-4673-1085-7
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2012.6258385
