Change search
ReferencesLink to record
Permanent link

Direct link
Peak-power controlling technique for enhancing digital pre-distortion of RF power amplifiers
KTH, School of Electrical Engineering (EES), Signal Processing. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.
KTH, School of Electrical Engineering (EES), Signal Processing. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.
Vrije Universiteit Brussel, ELEC department.
University of Gävle, Radio center for measurement technology.
Show others and affiliations
2012 (English)In: IEEE transactions on microwave theory and techniques, ISSN 0018-9480, E-ISSN 1557-9670, Vol. 60, no 11, 3571-3581 p.Article in journal (Refereed) Published
Abstract [en]

In this paper, we present a method to limit the generation of signal peak power at the output of a digital pre-distorter that is applied to a RF power amplifier (PA) operating in strong compression. The method can be considered as a joint crest-factor reduction and digital pre-distortion (DPD). A challenging characteristic of DPD when applied to a PA in strong compression is the generation of relatively high peaks due to the DPD expansion behavior. Such high peaks generation, which may be physically unrealistic, can easily damage the amplification system. Such a phenomenon, referred in this study as DPD-avalanche, is more noticed when the signal exciting the PA is compressed due to crest-factor reduction. The suggested method for controlling such DPD-avalanche is based on shaping the input signal to the DPD in such a way to keep the pre-distorted signal peak power below or near the maximum allowed peak power of the PA. The suggested method is tested experimentally on a Class-AB and a Doherty PA when excited with a wideband orthogonal frequency-division multiplexing (OFDM) signal. Scenarios for an OFDM signal with and without crest-factor reduction are evaluated. Measurement results when using the proposed DPD-avalanche controller show smooth deterioration of the in-band and out-of-band linearity compared to steep deterioration when no controller is used. In addition, the suggested controller offers a higher operating power range of the DPD while fulfilling out-of-band distortion requirements and preserving low in-band error.

Place, publisher, year, edition, pages
2012. Vol. 60, no 11, 3571-3581 p.
Keyword [en]
Controller, digital pre-distortion (DPD), orthogonal frequency-division multiplexing (OFDM) systems, peak-to-average power reduction, power amplifier (PA) linearization
National Category
Signal Processing
URN: urn:nbn:se:kth:diva-70006DOI: 10.1109/TMTT.2012.2213836ISI: 000310969100025ScopusID: 2-s2.0-84869380701OAI: diva2:485741
ICT - The Next Generation

QC 20121221

Available from: 2012-01-30 Created: 2012-01-30 Last updated: 2013-04-11Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Nader, CharlesLandin, Per NiklasBjörsell, NiclasHändel, Peter
By organisation
Signal ProcessingACCESS Linnaeus Centre
In the same journal
IEEE transactions on microwave theory and techniques
Signal Processing

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 60 hits
ReferencesLink to record
Permanent link

Direct link