On the Maximum Efficiency of Power Amplifiers in OFDM Broadcast Systems with Envelope Following

  • Robert Wolf
  • Frank Ellinger
  • Ralf Eickhoff
Conference paper
Part of the Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering book series (LNICST, volume 45)

Abstract

We suggest a method for determining the efficiency of the power amplifier of an OFDM broadcast system. We present how far the efficiency of conventional power amplifiers can be increased by applying envelope following. The dependency of the efficiency on the probability of clipping is derived. In this context all three possibilities of operating point adjustment are investigated. Finally, we show that by adjusting only the operating point voltage of the power amplifier the efficiency of OFDM broadcast systems can be doubled.

Keywords

OFDM envelope following power amplifier efficiency broadcast DVB-T operating point adjustment 

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Copyright information

© ICST Institute for Computer Science, Social Informatics and Telecommunications Engineering 2010

Authors and Affiliations

  • Robert Wolf
    • 1
  • Frank Ellinger
    • 1
  • Ralf Eickhoff
    • 1
  1. 1.Chair for Circuit Design and Network TheoryTechnische Universität DresdenGermany

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