Process for compensating nonlinearities in an amplifier circuit

Details Process for compensating nonlinearities in an amplifier circuit Process for compensating nonlinearities in an amplifier circuit

H - Electricity

03

F

H03F 1/32 (2006.01)

Patent

CA 2046457

90/059 ABSTRACT OF THE DISCLOSURE The invention relates to a process for compensating nonlinearities in an amplifier circuit. An input signal s(t) is amplified to form an output signal y(t) using an amplifier circuit (2) (power amplifier) subject to nonlinearities. In accordance with the invention, a predistortion filter (1) is connected upstream of the amplifier circuit (2). An aggregate signal Image is formed in said filter from the input signal s(t) and a predistorted signal x(t) fed back from the output of the predistortion filter, and integrated with respect to time. The predistorted signal x(t) is fed to the amplifier circuit subject to nonlinearities. In this case, the prescribed number n+l of coefficients k0, ..., kn is determined in accordance with the model Image so that for a given input signal x(t) of the amplifier circuit the output signal determined in accordance with the model is essentially identical with the output signal y(t) of the amplifier circuit. (Figure 1)

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