出版社：Society for Microwave Technique, Technologies and Systems, Serbia and Montenegro IEEE MTT-S Chapter
摘要：A novel linearization technique for RF power amplifiers based on the modified baseband signal that modulates the fundamental carrier second harmonic is presented in this paper. Signals prepared for linearization are inserted at the input of the amplifier transistor (together with the fundamental useful signal) or injected simultaneously at the input and at the output of the amplifier transistor. In-phase and quadraturephase components of the modified baseband signal are formed as the products of the second order nonlinearity of a nonlinear system fed by the useful baseband signal. The effects of the proposed linearization method are considered on a single stage power amplifier for quadrature amplitude modulated signals at different input power levels going up to 1dB below saturation region, as well as for WCDMA digitally modulated signal.
