Decomposition of piecewise-polynomial model of a predistorter for power amplifier

E. B. Solovyeva

doi:10.3103/S0735272715020065

Authors

E. B. Solovyeva Saint Petersburg Electrotechnical University "LETI", Russian Federation

DOI:

https://doi.org/10.3103/S0735272715020065

Keywords:

power amplifier, linearization, predistorter, nonlinear compensation, Volterra model, nonlinear operator

Abstract

Decomposition of piecewise-polynomial model of a predistorter has been performed taking into account the alteration dynamics of the complex envelope’s magnitude for the signal, which is converted by an amplifier. Decomposition model provides higher accuracy of nonlinear distortions compensation for signals in the amplifier compared with piecewise-polynomial model of a predistorter. Comparative analysis of predistorters’ models has been carried out for the linearization of the Wiener–Hammerstein model of the power amplifier.

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