A Low-Complexity Digital Predistortion Technique for Digital I/Q Transmitters

Mohammadreza Beikmirza*, Leo C.N. De Vreede, Morteza S. Alavi

*Corresponding author for this work

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

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Abstract

This paper presents an advanced yet simple digital pre-distortion (DPD) technique for digital I/Q transmitters (DTXs). Exploiting the I/Q orthogonality, an effective 2×1-D DPD procedure is proposed to bypass the exhaustive 2-D search of the entire constellation diagram. Utilizing this technique, a four-way Doherty DTX is linearized. Measurement results demonstrate that for a non-contiguous six-carrier OFDM-QAM signal with aggregated bandwidth of 150MHz, the ACPR is better than -47.3dBc, and EVM is better than -41/-40dB for channel-1/-6, respectively.

Original languageEnglish
Title of host publication2023 IEEE/MTT-S International Microwave Symposium, IMS 2023
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages787-790
Number of pages4
ISBN (Electronic)9798350347647
DOIs
Publication statusPublished - 2023
Event2023 IEEE/MTT-S International Microwave Symposium, IMS 2023 - San Diego, United States
Duration: 11 Jun 202316 Jun 2023

Publication series

NameIEEE MTT-S International Microwave Symposium Digest
Volume2023-June
ISSN (Print)0149-645X

Conference

Conference2023 IEEE/MTT-S International Microwave Symposium, IMS 2023
Country/TerritoryUnited States
CitySan Diego
Period11/06/2316/06/23

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

  • constellation
  • Digital pre-distortion
  • digital transmitter
  • DPD
  • mapping
  • RF-DAC

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