Look-up table techniques for adaptive digital predistortion: a development and comparison

Kathleen J. Muhonen, Mohsen Kavehrad, Rajeev Krishnamoorthy

Research output: Contribution to journalArticlepeer-review

156 Scopus citations

Abstract

Simple techniques are presented for performing digital predistortion by use of look-up tables. Performance is measured by the traditional spectral regrowth analysis which quantifies the out-of-band distortion. Also included in the performance evaluation is constellation distortion which quantifies the in-band distortion which is important for bit erro rate (BER) performance. As an added performance measure, predistortion is also analyzed with respect to its effect on amplifier efficiency. A nonuniform spacing technique is described which is simple to implement and has a performance very close to a cited optimum approach. In addition, scaling the gain of these tables provides further improvement in terms of correction and efficiency performance. Finally, adaptive indexing is introduced. These algorithms allow the various techniques to adapt to changing signal and power amplifier characteristics.

Original languageEnglish (US)
Pages (from-to)1995-2002
Number of pages8
JournalIEEE Transactions on Vehicular Technology
Volume49
Issue number5
DOIs
StatePublished - Sep 2000

All Science Journal Classification (ASJC) codes

  • Automotive Engineering
  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Applied Mathematics

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