LINEARIZATION METHOD FOR AMPLIFIER, AND AMPLIFIER ARRANGEMENT

摘要

The invention relates to a linearization method for an RF amplifier (104) and an arrangement implementing the method. A difference between an output signal of the amplifier (104) and an unpredistorted input signal supplied to the amplifier (104) is formed from baseband, quadrature components by means of a complex LMS algorithm in adaptation means (120). On the basis of the signal difference, the non-linearity of the amplifier (104) is adaptively corrected before a quadrature modulator (102) by changing the values of the complex quadrature components of the baseband signal by means of digital predistortion coefficients (F) retrieved from a memory (108).