Describing Functions Can Better Model Hard Nonlinearities In The Frequency Domain Than The Volterra Theory
Jan Verspecht, Jan Verspecht bvba · 1999
In this text a new kind of model is proposed to describe nonlinear devices in the frequency domain. The approach is based upon the use of describing functions and allows the description of hard nonlinearities better than an approach based upon the Volterra theory. A.1 Introduction 2 A.1 Introduction Describing and measuring nonlinear behavior of electrical components is very important for many high-technological applications. Practical examples are digital systems, mixers, signal samplers, power amplifiers, frequency multipliers,... Sometimes the nonlinear behavior is needed for the device functionality (signal sampling, frequency translation, frequency multiplying,,...), for other devices the nonlinear behavior is a parasitic effect (the generation of parasitic intermodulation products,...). In many applications the input signals are very well approximated by a sum of sinewaves, such that a frequency domain approach is preferred. Typical applications are wireless communication sys...