NDLI: Distortion-characteristic estimation predistorter for high efficiency power amplifiers

Content Provider	IET Digital Library
Author	Ren, Zhiyuan Chen, Hsiao Hwa Chen, Wei Zen
Abstract	Power amplifier (PA) is one of important components in wireless communication system. However, its non-linear and memory characteristic cause harmful distortion, which significantly decreases the power efficiency and wastes electronic energy since the power of PA needs back off. To overcome the non-linear and memory problems, a novel method based on distortion-characteristic estimation algorithm is developed in this study. The main innovation of this study is manifested in two aspects: first, the authors use well designed training signals to estimate the distortion characteristic of the PA; second, a novel PA characteristic estimation algorithm is developed in order to calculate the optimal state of the ideal predistorter that behaves like the inverse characteristic of PA theoretically. Since this novel method does not require the error between original signals and feedback signals, it can avoid the significant errors caused by the time mismatch between source signals and feedback signals, and can increase the power efficiency of the PA. The simulation results validate the performance increase and the synchronisation-error immunity over the existing simplified filter look up table method.
Starting Page	1024
Ending Page	1030
Page Count	7
ISSN	17519675
Volume Number	10
e-ISSN	17519683
Issue Number	Issue 9, Dec (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-spr/10/9
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-spr.2016.0087
Journal	IET Signal Processing
Publisher Date	2016-06-06
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Amplifiers Distortion Distortion Characteristic Distortion-characteristic Estimation Predistorter Feedback Feedback Signal Filter Look Up Table Method High Efficiency Power Amplifiers Innovation Inverse Characteristic Memory Characteristic Nonlinear Characteristic Power Amplifier Power Efficiency Signal Processing Signal Processing And Detection Source Signal Synchronisation-error Immunity Wastes Electronic Energy Wireless Communication System
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering

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