Inversion of multitone-functions in almost linear systems

Identification of linear systems with multitone functions has received a great deal of attention. Identification errors will be caused by nonlinear distortions. If the object is simply to model the system for only small signal deviations from an operating point, then the nonlinear effects may be minimized and the system regarded as linear. So it is important for practical applications to find multitone functions with small peak values. The behavior of a certain class of multitone functions is investigated in this paper. The question of the inversion of multitone functions is analyzed. The results solve a problem proposed by Professor T. Massey.