Title page for etd-0729108-175628


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URN etd-0729108-175628
Author Shih-hao Lin
Author's Email Address No Public.
Statistics This thesis had been viewed 5352 times. Download 2191 times.
Department Electrical Engineering
Year 2007
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Linearization of High Power Amplifiers Using Digital Predistortion for WiMAX Basestation Applications
Date of Defense 2008-06-25
Page Count 118
Keyword
  • WiMAX
  • Power Amplifier
  • Digital Predistortion
  • Abstract This thesis utilizes the digital predistortion technique to improve the linearity of high power amplifiers for WiMAX basestation applications. The power amplifier with the proposed technique can achieve higher output power and efficiency than with the conventional output power backoff technique. Owing to a very high PAPR value of the OFDM modulation signals applied to WiMAX basestation, the linearity requirement for the basestation power amplifiers is very strict. This thesis adopts a look-up table predistorter based on a polar scheme and realizes the digital predistorter circuitry using FPGA. As a result, the implemented digital predistorter successfully enhances the linearity of a 15W Lateral MOSFET Class-AB power amplifier operating in 2.6 GHz WiMAX band. Under the conditions that satisfy the spectrum mask and EVM requirement, the power amplifier with the digital predistorter can operate at higher output power and conversion efficiency than without the digital predistorter.
    Advisory Committee
  • Sheng-Fuh Chang - chair
  • Kang-Chun Peng - co-chair
  • Chie-In Lee - co-chair
  • Huey-Ru Chuang - co-chair
  • Tzyy-Sheng Horng - advisor
  • Files
  • etd-0729108-175628.pdf
  • indicate access worldwide
    Date of Submission 2008-07-29

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