Patent ID: 6240278
Filing Date: 2001-05-29
Classification: H03F,H04B

Abstract:
A device for providing scalar measurement-based predistortion for linearization in a radio frequency RF power amplifier, comprising:A) a polynomial predistortion unit, coupled to receive an input baseband signal and polynomial coefficient weights, for predistorting the baseband signal to provide a predistorted baseband signal in accordance with the polynomial coefficient weights;B) an RF modulator, coupled to the polynomial predistortion unit and to an RF generator, for modulating the predistorted baseband signal to provide an RF signal;C) an RF power amplifier, coupled to the RF modulator and to a power supply, for amplifying the RF signal to provide an amplified RF signal;D) a scalar cost function generator, coupled to receive the amplified RF signal, for computing a scalar cost function; andE) a coefficient update unit, coupled to receive the scalar out-of-band-energy cost function, for tuning the polynomial coefficients in accordance with minimizing the scalar cost function to provide a linear amplified RF signal.