Compensation of linear and nonlinear distortions in envelope tracking amplifier

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

    5 Citations (Scopus)

    Abstract

    This paper considers a problem of time-misalignment between envelope and RF signals in envelope-tracking amplifiers. We propose two novel time-misalignment compensation methods which are based on the concepts of self-tuning control and model reference control from adaptive control theory. The performance of proposed methods, which we measure by the achievable adjacent-channel power ratio, is compared to the performance of the state-of-the-art method. Simulation results suggest that the time-misalignment compensation which is based on self-tuning structure offers a comparable performance as the state-of-the-art method. On the other hand, the time-misalignment compensation which is based on model reference structure outperforms the state-of-the-art method by 20 dB on the average. Furthermore, compensation with model reference structure appears to be very robust to changes in system parameters. (10 refs.)
    Original languageEnglish
    Title of host publication19th International Symposium on Personal, Indoor and Mobile Radio Communications
    Place of PublicationPiscataway, NJ, USA
    PublisherIEEE Institute of Electrical and Electronic Engineers
    Pages5
    ISBN (Print)978-1-4244-2643-0
    DOIs
    Publication statusPublished - 2008
    MoE publication typeA4 Article in a conference publication
    Event19th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2008 - Cannes, France
    Duration: 15 Sep 200818 Sep 2008

    Conference

    Conference19th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2008
    CountryFrance
    CityCannes
    Period15/09/0818/09/08

    Keywords

    • adaptive predistortion
    • nonlinear effects
    • Wiener systems

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