DIGITAL PRE-DISTORTER OF PIPE-LINED ARCHITECTURE USING CORDIC ALGORITHM AND METHOD FOR DISTORTING SIGNAL THEREOF

摘要

PURPOSE: A digital pre distorter and this signal distortion method of the pipeline of using the cord algorithm reduce the use area of the digital pre distorter by constituting the core unit and polynomial part with the form of pipeline. CONSTITUTION: A core unit(230) comprises a plurality of core blocks outputting the amplitude and phase of the digital signal. Core blocks are composed of the form of pipeline. A distorter(240) distorts the phase outputted in the core unit. Distorter comprises the register Block(240a) storing the coefficient of the inverse function of the polynomial part(240b) distorted and the signal inputted to the core unit to the amplitude inputted to the core unit and the value coping with phase with the inverse function according to the amplitude.