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Evolutionary Multiobjective Optimization for Digital Predistortion Architectures

  • Lin Li
  • Amanullah Ghazi
  • Jani Boutellier
  • Lauri Anttila
  • Mikko Valkama
  • Shuvra S. Bhattacharyya
Conference paper
Part of the Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering book series (LNICST, volume 172)

Abstract

In wireless communication systems, high-power transmitters suffer from nonlinearities due to power amplifier (PA) characteristics, I/Q imbalance, and local oscillator (LO) leakage. Digital Predistortion (DPD) is an effective technique to counteract these impairments. To help maximize agility in cognitive radio systems, it is important to investigate dynamically reconfigurable DPD systems that are adaptive to changes in the employed modulation schemes and operational constraints. To help maximize effectiveness, such reconfiguration should be performed based on multidimensional operational criteria. With this motivation, we develop in this paper a novel evolutionary algorithm framework for multiobjective optimization of DPD systems. We demonstrate our framework by applying it to develop an adaptive DPD architecture, called the adaptive, dataflow-based DPD architecture (ADDA), where Pareto-optimized DPD parameters are derived subject to multidimensional constraints to support efficient predistortion across time-varying operational requirements and modulation schemes. Through extensive simulation results, we demonstrate the effectiveness of our proposed multiobjective optimization framework in deriving efficient DPD configurations for run-time adaptation.

Keywords

Digital predistortion Multiobjective optimization Evolutionary algorithms 

Notes

Acknowledgements

This research was supported in part by Tekes, the Finnish Funding Agency for Innovation; and the U.S. National Science Foundation.

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Copyright information

© ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2016

Authors and Affiliations

  • Lin Li
    • 1
  • Amanullah Ghazi
    • 2
  • Jani Boutellier
    • 2
  • Lauri Anttila
    • 3
  • Mikko Valkama
    • 3
  • Shuvra S. Bhattacharyya
    • 1
    • 3
  1. 1.ECE DepartmentUniversity of MarylandCollege ParkUSA
  2. 2.Department of Computer Science and EngineeringUniversity of OuluOuluFinland
  3. 3.Department of Electronics and Communications EngineeringTampere University of TechnologyTampereFinland

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