Dynamically optimum lookup-table spacing for power amplifier predistortion linearization

Lin, Chih-Hung; Chen, Hsin-Hung; Wang, Yung-Yi; Chen, Jiunn-Tsair

doi:10.1109/tmtt.2006.872808

Cited by 33 publications

(1 citation statement)

References 19 publications

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“…In [23] a segmented approach is used with more LUT entries in the strongly nonlinear segments than in the linear ones. In [24] the LUT-spacing is dynamically optimized in function of online estimated PA characteristics and the input signal statistics using histograms to approximate the signal statistics. In [25] and in [26], the authors theoretically study respectively the optimal spacing of piecewise linear LUT DPD and of a quadratically interpolated LUT DPD.…”

Section: Piecewise Modeling In Quasi-memoryless Modelsmentioning

confidence: 99%

On Segmented Predistortion for Linearization of RF Power Amplifiers

Baudoin¹

2020

RADIOENGINEERING

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This paper presents a general survey of digital predistortion (DPD) techniques with segmentation. A comparison of global DPD with two segmented approaches namely Vector-Switched DPD and Decomposed Vector Rotation DPD is presented with the support of experimentation on a strongly non-linear 3 ways Doherty PA. It shows the interest of both segmented approaches in terms of linearization performance, complexity and ease of implementation compared to the global DPD. The paper starts with some mathematical generalities on interpolation and splines. It focuses on segmented models derived from Volterra series even if the presented principles can also be applied to neural networks.

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