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An adaptive fuzzy logic system for the compensation of nonlinear distortion in wireless power amplifiers.

Authors :
Vaskovic, Mina
Kodogiannis, Vassilis S.
Budimir, Djuradj
Source :
Neural Computing & Applications; Oct2018, Vol. 30 Issue 8, p2539-2554, 16p
Publication Year :
2018

Abstract

Computational intelligent systems are becoming an increasingly attractive solution for power amplifier (PA) behavioural modelling, due to their excellent approximation capability. This paper utilizes an adaptive fuzzy logic system (AFLS) for the modelling of the highly nonlinear MIMIX CFH2162-P3 PA. Moreover, PA’s inverse model based also on AFLS has been developed in order to act as a pre-distorter unit. Driving an LTE 1.4 MHz 64 QAM signal at 880 MHz as centre frequency at PA’s input, very good modelling performance was achieved, for both PA’s forward and inverse dynamics. A comparative study of AFLS and neural networks (NN) has been carried out to establish AFLS as an effective, robust and easy-to-implement baseband model, which is suitable for inverse modelling of PAs and capable to be used as an effective digital pre-distorter. Pre-distortion system based on AFLS achieved distortion suppression of 84.2%, compared to the 48.4% gained using the NN-based equivalent scheme. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
09410643
Volume :
30
Issue :
8
Database :
Complementary Index
Journal :
Neural Computing & Applications
Publication Type :
Academic Journal
Accession number :
132480789
Full Text :
https://doi.org/10.1007/s00521-017-2849-3