Agile broadband behavioral modelling of nonlinear power amplifiers using coarse-predistortion technique

Oualid Hammi, Ibrahim Abdulateef, Souheil Bensmida

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

Abstract

This paper proposes a behavioral modelling method that allows the characterization of nonlinear power amplifiers over wide bandwidths of operation, for applications such as LTE-Advanced, while reducing the output observation bandwidth requirement. The proposed behavioral modelling system is based on the use of a coarse-predistortion function upstream of the device under test. This entails the identification of a coarse memoryless predistorter, independently, under narrowband testing condition. Then, the coarse-predistorter is used to cancel out the amplifier's static nonlinearities allowing for its characterization under reduced observation bandwidth. The proposed method is experimentally validated and the constructed model's performance is evaluated and compared against that of behavioral models identified using conventional behavioral modelling setup. Significant reduction in the required observation bandwidth is possible while maintaining the accuracy of the extracted models.

Original languageEnglish
Title of host publication2018 International Conference on Signals and Systems, ICSigSys 2018 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages7-12
Number of pages6
ISBN (Electronic)9781538656891
DOIs
Publication statusE-pub ahead of print - 4 Jun 2018
Event2nd International Conference on Signals and Systems, ICSigSys 2018 - Bali, Indonesia
Duration: 1 May 20183 May 2018

Conference

Conference2nd International Conference on Signals and Systems, ICSigSys 2018
CountryIndonesia
CityBali
Period1/05/183/05/18

Keywords

  • behavioral modeling
  • distortions
  • memory effects
  • power amplifier

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  • VSA

    Ben Smida, S.

    1/10/1530/06/17

    Project: Research

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