Compensation of linear and nonlinear distortions in envelope tracking amplifier

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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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  • Cite this

    Kotelba, A., Hekkala, A., & Lasanen, M. (2008). Compensation of linear and nonlinear distortions in envelope tracking amplifier. In 19th International Symposium on Personal, Indoor and Mobile Radio Communications (pp. 5). IEEE Institute of Electrical and Electronic Engineers. https://doi.org/10.1109/PIMRC.2008.4699408