• DocumentCode
    2133192
  • Title

    Linearization of Microwave Emitters using an Adaptive Digital Predistorter

  • Author

    Jeckeln, Ernesto G. ; Ghannouchi, Fadhel M. ; Sawan, Mohamad

  • Author_Institution
    Department of Electrical and Computer Engineering, Ecole Polytechnique de Montréal, C.P. 6079, Succ. Centre Ville, Montréal, Canada H3C 3A7
  • Volume
    1
  • fYear
    1997
  • fDate
    8-12 Sept. 1997
  • Firstpage
    336
  • Lastpage
    340
  • Abstract
    Adaptive digital predistortion for nonlinear power amplifier (PA) became one of the most robust linearization techniques that can be implemented in digital signal processors (DSP) environment. However, its precision compensation for AM-AM and AM-PM distortion is wasted when the quadrature modulator (QM) impairments are not to be considered. This paper presents a new digital predistorter for microwave emitters with real time modeling of both, PA and QM distortions, that can compensate for nonlinearity, gain imbalance, phase imbalance and DC offset. An improvement of 35 dB of out-of-band power is obtained in simulating with 105 complex input look-up table using 2D interpolation.
  • Keywords
    Digital signal processing; Digital signal processors; Interpolation; Linearization techniques; Nonlinear distortion; Phase distortion; Power amplifiers; Predistortion; Robustness; Table lookup;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Microwave Conference, 1997. 27th European
  • Conference_Location
    Jerusalem, Israel
  • Type

    conf

  • DOI
    10.1109/EUMA.1997.337821
  • Filename
    4138862
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=2133192