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Wide band digital predistortion using iterative feedback decomposition

  • Ahmad ShokairEmail author
  • Ali Beydoun
  • Dang-Kièn Germain Pham
  • Chadi Jabbour
  • Patricia Desgreys
Article

Abstract

This paper presents a new digital predistortion (DPD) technique for wide band applications. Digital predistortion is the most useful linearization technique to reduce power amplifier (PA) nonlinearity effects due to its high flexibility and low complexity. However, this technique requires high performances ADC to digitize the feedback signal whose bandwidth is equal to several times the original bandwidth due to spectral regrowth generated by the PA nonlinearity. This point represents one of the main bottlenecks for the deployment of the wideband LTE-A standard. The method proposed in this paper calculates the DPD coefficients iteratively using an ADC with a fixed bandwidth equal to the original bandwidth. The proposed method has been simulated and compared with other methods using Matlab. Simulation results show that the proposed method has almost the same performance as the other methods with an ACPR of − 60 dB. Moreover, it reduces considerably the constraints on the ADC and the power calculation resources.

Keywords

Digital predistortion (DPD) Power amplifiers (PA) Green communication Memory effect Analog to digital converter (ADC) 

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Ahmad Shokair
    • 1
    Email author
  • Ali Beydoun
    • 1
  • Dang-Kièn Germain Pham
    • 2
  • Chadi Jabbour
    • 2
  • Patricia Desgreys
    • 2
  1. 1.HKS Laboratory, Physics and Electronics Department, Faculty of SciencesLebanese UniversityBeirutLebanon
  2. 2.LTCI, Télécom ParisTechUniversité Paris-SaclayParisFrance

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