ADAPTIVE FEEDFORWARD LINEAR POWER AMPLIFIER USING ANALOG CONTROLLER AND METHOD FOR LINEARIZING THEREOF

摘要

The invention new adaptive feed-forward linearization scheme and relates to a power amplifier applied this end, the main signal cancellation loop, the same for the two main signal canceller input path signal by being controlled by each channel signal to maintain the amplitude and phase balance level and and so as to be offset call is given from the given canceller output port number can be obtained with opposite phase, the distortion signal cancellation loop at the same level and opposite phase with respect to the two-path distortion signal by being controlled by respective path signal to have a fixed gain and the reverse phase to make it possible to obtain a distorted signal can be canceled at the last port, in contrast with the conventional adaptive linearization scheme does not require any distortion or any pilot signal of the intentional signal excellent power efficiency and linearity with respect to the varying operating conditions, the adaptive blood using analog controller having It provides a de-forward linear power amplifier and a digital feedback linearizing method.