Compensation of the Nonlinear Power Amplifier by Using SCPWL Predistorter with Genetic Algorithm in OFDM technique

Mohannad A. M. Al-Ja'afari; Hussein M. H. Al-Rikabi; Hassan F. M. Fakhruldeen

doi:10.31026/j.eng.2018.06.03

Article Details

Compensation of the Nonlinear Power Amplifier by Using SCPWL Predistorter with Genetic Algorithm in OFDM technique

Authors:

Mohannad A. M. Al-Ja'afari | Hussein M. H. Al-Rikabi | Hassan F. M. Fakhruldeen

Publisher:

University of Baghdad

Journal:

Journal of Engineering Vol.24 Issue 6, pp.29-40

Document Type:

Article

Publication Date:

1/2018

Document Language:

English

Document ID (Org No.):

2001381329

pISSN:

2520-3339

DOI:

10.31026/j.eng.2018.06.03

Keywords:

Abstract:

 The High Power Amplifiers (HPAs), which are used in wireless communication, are distinctly characterized by nonlinear properties. The linearity of the HPA can be accomplished by retreating an HPA to put it in a linear region on account of power performance loss. Meanwhile the Orthogonal Frequency Division Multiplex signal is very rough. Therefore, it will be required a large undo to the linear action area that leads to a vital loss in power efficiency. Thereby, back-off is not a positive solution. A Simplicial Canonical Piecewise-Linear (SCPWL) model based digital predistorters are widely employed to compensating the nonlinear distortion that introduced by a HPA component in OFDM technology. In this paper, the genetic algorithm has been used to optimized the SCPWL coefficients by using Matlab 2015b, and then the Bit Error Rate (BER) performance has been evaluated for OFDM signal with 16-QAM and 64-QAM modulations in three cases, with nonlinear effects, without nonlinear effects (ideal case), with SCPWL and with nonlinear effects (compensated case)). The simulation results showed that the predistorter that adjusted by the genetic algorithm accomplishes huge execution change by successfully compensating the nonlinearity and reducing the input and output back-off (IBO, OBO) of the HPA.

Article Details

Compensation of the Nonlinear Power Amplifier by Using SCPWL Predistorter with Genetic Algorithm in OFDM technique

Authors:

Mohannad A. M. Al-Ja'afari | Hussein M. H. Al-Rikabi | Hassan F. M. Fakhruldeen

Publisher:

University of Baghdad

Journal:

Journal of Engineering Vol.24 Issue 6, pp.29-40

Document Type:

Article

Publication Date:

1/2018

Document Language:

English

Document ID (Org No.):

2001381329

pISSN:

2520-3339

DOI:

10.31026/j.eng.2018.06.03

nonlinear power amplifier

genetic algorithm digital predistorter

simplicial canonical piecewise linear model

Issues

Article Details

Compensation of the Nonlinear Power Amplifier by Using SCPWL Predistorter with Genetic Algorithm in OFDM technique

Authors: Mohannad A. M. Al-Ja'afari | Hussein M. H. Al-Rikabi | Hassan F. M. Fakhruldeen

Publisher: University of Baghdad

Journal: Journal of Engineering Vol.24 Issue 6, pp.29-40

Document Type: Article

Publication Date: 1/2018

Document Language: English

Document ID (Org No.): 2001381329

pISSN: 2520-3339

DOI: 10.31026/j.eng.2018.06.03

nonlinear power amplifier

genetic algorithm digital predistorter

simplicial canonical piecewise linear model

Issues

Authors:

Mohannad A. M. Al-Ja'afari | Hussein M. H. Al-Rikabi | Hassan F. M. Fakhruldeen

Publisher:

University of Baghdad

Journal:

Journal of Engineering Vol.24 Issue 6, pp.29-40

Document Type:

Article

Publication Date:

1/2018

Document Language:

English

Document ID (Org No.):

2001381329

pISSN:

2520-3339

DOI:

10.31026/j.eng.2018.06.03