CIRCUITS FOR LINEARIZING AN OUTPUT SIGNAL OF A NON-LINEAR COMPONENT AND RELATED DEVICES AND METHODS

WIPO Patent Application WO/2016/078732

A8

This disclosure provides a circuit for linearizing an output signal Sout produced by a non-linear component based on an input signal x(n). The circuit comprises a primary pre-distorter module configured to generate a pre-distorted signal y(n) based on the input signal x(n) and a primary pre-distortion function parameterized by a pre-distortion parameter λ and to feed the pre-distorted signal y(n) to the non-linear component. The circuit comprises an estimation module. The estimation module is configured to receive samples z(n) of the output signal Sout, and to determine the pre-distortion parameter λ. The estimation module comprises a secondary pre-distorter module configured to generate a secondary pre-distorter output signal r(n) based on a secondary pre-distortion function and the samples z(n) of the output signal Sout. The secondary pre-distorter module is configured to determine the pre-distortion parameter λ based on a previously determined pre-distortion parameter stored on a data storage, the secondary pre-distorter output signal r(n) and the pre-distorted signal y(n) provided by the primary pre-distorted module. The determining comprises correlating the input signal x(n) with an error signal between the pre-distorted signal y(n) and the secondary pre-distorter output signal r(n).

GAVERT BJÖRN (SE)
GUSTAFSSON TONY (SE)

PCT/EP2014/075345

July 14, 2016

November 22, 2014

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ERICSSON TELEFON AB L M (SE)

H03F1/32; H03F3/195; H03F3/24; H04L27/36

VEJGAARD, Christian (Patent Unit GLLindholmspiren 11, Göteborg, SE)

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