New look-up-table predistorter for power amplifier with memory effects

Qin Zhang*, Si Liang Wu, Hai Li

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

A new look-up-table memory predistorter for power amplifier with memory effects is proposed. The cascade extension of the memoryless predistorter and the structure of finite-impulse-response filter significantly reduce the complexity compared to memory polynomial methods, whereas they can get the close performance. Two improved methods, linear insertion and iteration with weights' windows, are also discussed to solve quantization distortions and convergence speed problems respectively, which are introduced intrinsically by look-up-table method. Under power amplifier's memory polynomial model, simulation results of multi-carriers WCDMA wideband signal and OFDM wideband signal show excellent performance of the look-up-table memory predistorter and the efficiency of the two improved methods.

Original languageEnglish
Pages (from-to)1728-1732
Number of pages5
JournalTien Tzu Hsueh Pao/Acta Electronica Sinica
Volume36
Issue number9
Publication statusPublished - Sept 2008

Keywords

  • Amplifier linearization
  • Look-up-table
  • Power amplifier with memory effects
  • Predistorter

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