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A Novel Analog Pre-distorter of TWTA Non-linearity in High Power Satellite Transmitters

  • Rafik Zayani
  • Ridha Bouallegue
Conference paper
  • 552 Downloads
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4138)

Abstract

OFDM systems are susceptible to HPA non-linearities in particular because of their large peak-to-average power ratios (PAPR). Several pre-distortion or post-distortion schemes for compensation these effects of nonlinearities in communications systems have been studied recently.

In this paper, we present a new analog pre-distorter to enhance the power efficiency of satellite OFDM transmitters using TWT amplifiers.

This conceptually simple technique can in linearize a HPA system quite well, if the pre-distorter and main amplifier are sufficiently well matched.

In addition, the performance of the new pre-distortion scheme for OFDM systems is evaluated in terms of spectrum and total degradation BER. Simulation results also show that our pre-distortion scheme is efficient in compensating the non-linear distortion of HPAs.

Keywords

OFDM Pre-distorter HPA TWTA SSPA 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Rafik Zayani
    • 1
    • 2
  • Ridha Bouallegue
    • 2
    • 3
  1. 1.Institut Supérieur d’Informatique / ISI 
  2. 2.Unité de recherches Systèmes de Télécommunications / 6’Tel à Sup’Com 
  3. 3.Ecole Nationale d’Ingénieur de Sousse / ENISo 

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