Deep Neural Network Based Digital Predistorter of Power Amplifiers

Daylak F., Güneş E. O., Bayat O., Özoğuz İ. S.

13th International Conference on Electrical and Electronics Engineering, ELECO 2021, Virtual, Bursa, Turkey, 25 - 27 November 2021, pp.408-410 identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.23919/eleco54474.2021.9677871
  • City: Virtual, Bursa
  • Country: Turkey
  • Page Numbers: pp.408-410
  • Keywords: DNN, DPD, PA
  • Istanbul Technical University Affiliated: Yes


© 2021 Chamber of Turkish Electrical Engineers.We show how to address nonlinearities in power amplifiers (PAs), which limit the power efficiency of mobile devices, increase the error vector magnitude, using an deep neural-network (DNN) method. DPD is frequently performed using polynomial-based algorithms that employ an indirect-learning architecture (ILA), which can be computationally complex, particularly on mobile devices, and highly sensitive to noise. By first training a DNN to model the PA and then training a predistorter using PA data through the PA DNN model. The DNN DPD successfully learns the unique PA distortions that a polynomial-based model may struggle to fit, and therefore may provide a nice balance between computation cost and DPD efficiency. We use two different DNN models to show the performance of our DNN approach and examine the complexity tradeoffs.