Measuring volterra kernels (II)

Accurate measurement of Volterra kernels is an essential step in the modelling of weakly non‐linear physical systems via the block box approach, and in model validation. This paper is a sequel to an earlier paper,1 where practical methods for measuring Volterra kernels were presented along with a quick method for measuring the second‐order Volterra kernels. This paper extends that quick method for measuring higher‐order frequency‐domain Volterra kernels of weakly non‐linear systems. We further developed the quick method to measure directly the points of the Volterra kernels which are located along one or more axes in the frequency domain, thus making our method complete and more accurate than that presented in Reference 1. We illustrate our method by actually measuring a weakly non‐linear circuit whose Volterra kernels can be accurately calculated. the experimentally measured and the theoretically predicted results agree remarkably well.