A New Predistorter Design Technique For Nonlinear Digital Communication Channels

Abstract

This paper presents a nen- predistorter design technique for a nonlinear communication channel with QAhI modulation. The predistortion is accomplished by considering the compensation of the channel nonlinearities as a fixed point problem, and determining the &Ked point iteratively using contraction mapping theory. The main advantage of the proposed predistorter is its computational simplicity in the sense that all the processing units are equivalent.