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

Conference paper (2023)

Authors

M.R. Beikmirza Electronics - EEMCS
L.C.N. de Vreede Electronics - EEMCS
S.M. Alavi Electronics - EEMCS
Research Group
Electronics (EEMCS) (TU Delft)
Copyright: © 2023 M.R. Beikmirza, L.C.N. de Vreede, S.M. Alavi
DOI: https://doi.org/10.1109/IMS37964.2023.10187914
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Published Date

2023

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Electronics

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.

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