Paper Info
Title
A new digital predistorter linearizer for wide band signals.
Abstract
This paper presents a new method of digital adaptive predistortion for linearization of high-power amplifiers (HPAs) that mitigates linearization performance deterioration due to bandwidth limitation of feedback path. With increases of signal bandwidth, the effects of limited bandwidth of the predistorter feedback path cannot be ignored. In the proposed algorithm, adaptation is derived from direct learning for the lookup table (LUT) gains. According to the proposed approach, when the LUT contents are adapted according to an LMS algorithm, several other LUT entries adjacent to the currently processed entry are also updated. However, the level of adaption for adjacent entries is less than for the currently processed entry. This level is defined by the preselected window weight function. The proposed algorithm makes it possible to design a low-complexity, memoryless adaptive predistortion system with narrowband feedback path to compensate for the nonlinearity of an HPA.
Year
DOI
Venue
2011
10.1109/PIMRC.2011.6139727
PIMRC
Keywords
Field
DocType
circuit complexity,digital communication,feedback amplifiers,least mean squares methods,linearisation techniques,memoryless systems,signal processing,HPA nonlinearity,LMS algorithm,LUT gains,digital adaptive predistortion,digital predistorter linearizer,feedback path bandwidth limitation,high-power amplifier linearization,linearization performance deterioration,lookup table,low-complexity memoryless adaptive predistortion system design,narrowband feedback path,predistorter feedback path,signal bandwidth,wide band signals,DPD,HPA,baseband predistortion,linearization,memory effect,power amplifier
Signal processing,Lookup table,Baseband,Narrowband,Computer science,Control theory,Bandwidth (signal processing),Linearizer,Predistortion,Linearization
Conference
Citations 
PageRank 
References 
1
0.37
0
Authors
2
Name
Order
Citations
PageRank
Alexander N. Lozhkin123.50
Michiharu Nakamura242.28