Evolutionary multiobjective optimization for digital predistortion architectures

Lin Li, Amanullah Ghazi, Jani Boutellier, Lauri Anttila, Mikko Valkama, Shuvra S. Bhattacharyya

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

    3 Citations (Scopus)

    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.

    Original languageEnglish
    Title of host publicationCognitive Radio Oriented Wireless Networks
    Subtitle of host publication11th International Conference, CROWNCOM 2016, Grenoble, France, May 30 - June 1, 2016, Proceedings
    PublisherSpringer Verlag
    Pages498-510
    Number of pages13
    ISBN (Print)9783319403519
    DOIs
    Publication statusPublished - 2016
    Publication typeA4 Article in conference proceedings
    EventInternational Conference on Cognitive Radio Oriented Wireless Networks -
    Duration: 1 Jan 1900 → …

    Publication series

    NameLecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering
    Volume172
    ISSN (Print)1867-8211

    Conference

    ConferenceInternational Conference on Cognitive Radio Oriented Wireless Networks
    Period1/01/00 → …

    Keywords

    • Digital predistortion
    • Evolutionary algorithms
    • Multiobjective optimization

    Publication forum classification

    • Publication forum level 1

    ASJC Scopus subject areas

    • Computer Networks and Communications

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