DIGITAL PRE-DISTORTION (DPD) ESTIMATION WINDOW SEARCH

An apparatus for transmitting output signals includes a pre-distortion circuit configured to perform digital pre-distortion (DPD) on input signal samples using a plurality of DPD coefficients to generate a plurality of pre-distorted samples. The apparatus further includes an estimation window search...

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Bibliographic Details
Main Authors Pawliuk, Peter, Chance, Gregory, Jann, Benjamin
Format Patent
LanguageEnglish
Published 16.06.2022
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
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Summary:An apparatus for transmitting output signals includes a pre-distortion circuit configured to perform digital pre-distortion (DPD) on input signal samples using a plurality of DPD coefficients to generate a plurality of pre-distorted samples. The apparatus further includes an estimation window search circuit configured to determine a signal power characteristic for each pre-distorted sample of the plurality of pre-distorted samples, and select a subset of the plurality of pre-distorted samples based on the determined signal power characteristics. The subset of the plurality of pre-distorted samples is selected to fit within a predetermined estimation window size. The plurality of DPD coefficients is updated based on the subset of the plurality of pre-distorted samples.
Bibliography:Application Number: US202017122468