Title :
Multilevel Linc System Design for Power Efficiency Enhancement
Author :
Jheng, Kai-Yuan ; Chen, Yuan-Jyue ; Wu, An-Yeu Andy
Author_Institution :
Graduate Institute of Electronics Engineering, National Taiwan University, Taipei 10617, Taiwan
Abstract :
Linear amplifier with nonlinear components (LINC) is a power amplifier (PA) linearization technique which offers both high PA efficiency and high linearity of wireless transmitters. But at the output stage, LINC uses a power combiner which results in low system efficiency. To solve this problem, we propose a multilevel out-phasing (MOP) scheme and a corresponding architecture, multilevel LINC (MLINC), to increase power combiner efficiency of wireless transmitters. Under WCDMA system linearity requirements, we demonstrate the 3-level MLINC as a design example which enhances power combiner efficiency from 44.5% to 75.5%.
Keywords :
Design engineering; High power amplifiers; Linearity; Linearization techniques; Multiaccess communication; Power amplifiers; Power combiners; Power engineering and energy; Radio frequency; Radio transmitters; Linear amplifier with nonlinear components (LINC); out-phasing technique; power amplifier linearization;
Conference_Titel :
Signal Processing Systems, 2007 IEEE Workshop on
Conference_Location :
Shanghai, China
Print_ISBN :
978-1-4244-1221-1
Electronic_ISBN :
1520-6130
DOI :
10.1109/SIPS.2007.4387512
