FIELD: electrical engineering.
SUBSTANCE: invention relates to circuits for linearizing an output signal. Circuit includes a primary predistortion unit configured to generate a predistorted signal y(n) based on the input signal x(n) and the primary predistortion function, parametrized by the parameter n of the pre-emphasis, and its supply to the non-linear component. Circuit estimating unit is configured to receive samples z(n) of the output signal Sout and determining the pre-emphasis parameter with the possibility of generating a second predistorted output signal r(n) based on the secondary predistortion function and the z(n) samples of the output signal Sout. Secondary predistortion module is configured to determine a predistortion parameter based on a predetermined pre-emphasis parameter, stored in the memory, a secondary pre-skipped output signal r(n) and a pre-skew signal y(n) provided by the primary predistortion unit. Definition includes the correlation of the input signal x(n) with the error signal between the predistorted signal y(n) and the secondary pre-skewed output signal r(n).
EFFECT: technical result consists in reducing distortions with improved convergence of the output signal of the nonlinear component.
22 cl, 5 dwg
