Design of an adaptive predistorter for the compensation for the loudspeaker nonlinearity

摘要

PURPOSE: An adaptive predistorter design of a nonlinear loudspeaker using Volterra series is provided, which is used in developing a high quality audio system. CONSTITUTION: According to the adaptive predistorter design of a nonlinear loudspeaker using Volterra series, a predistortion filter distorts an input signal in advance so that an output of the loudspeaker has only a linear component as to the input signal in order to make an output signal without distortion. A learning system can achieve a complete learning by converging a signal passing through a predistorter and a signal passing through the learning system by adjusting a coefficient of the learning system using an error obtained from a difference between the signal passing through the predistorter and the signal passing through the learning system.