Adaptive baseband predistortion techniques for amplifier linearization

K. J. Muhonen, M. Kavehrad, R. Krishnamoorthy

Research output: Chapter in Book/Report/Conference proceedingConference contribution

11 Scopus citations

Abstract

Techniques are presented for performing digital predistortion with non-uniformly spaced look-up tables which compensate for amplifier nonlinearities. Performance measures include spectral re-growth analysis, which quantifies the out-of-band distortion, and constellation distortion, which quantifies the in-band distortion. This linearization technique is also analyzed with respect to its effect on amplifier efficiency. To further improve efficiency and performance, the look-up tables are normalized at the operating point instead of the linear gain point. Finally, adaptive algorithms are detailed. It is shown that with a changing signal or amplifier characteristic, adaptive indexing needs to be implemented. This is done efficiently with linked lists.

Original languageEnglish (US)
Title of host publicationConference Record of the 33rd Asilomar Conference on Signals, Systems, and Computers
EditorsMichael B. Matthews
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages888-892
Number of pages5
ISBN (Electronic)0780357000, 9780780357006
DOIs
StatePublished - Jan 1 1999
Event33rd Asilomar Conference on Signals, Systems, and Computers, ACSSC 1999 - Pacific Grove, United States
Duration: Oct 24 1999Oct 27 1999

Publication series

NameConference Record of the 33rd Asilomar Conference on Signals, Systems, and Computers
Volume2

Other

Other33rd Asilomar Conference on Signals, Systems, and Computers, ACSSC 1999
CountryUnited States
CityPacific Grove
Period10/24/9910/27/99

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Computer Networks and Communications

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    Muhonen, K. J., Kavehrad, M., & Krishnamoorthy, R. (1999). Adaptive baseband predistortion techniques for amplifier linearization. In M. B. Matthews (Ed.), Conference Record of the 33rd Asilomar Conference on Signals, Systems, and Computers (pp. 888-892). [831837] (Conference Record of the 33rd Asilomar Conference on Signals, Systems, and Computers; Vol. 2). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ACSSC.1999.831837