ILLUSTRATION OF THE EFFECTS OF SAMPLING ON HIGHER-ORDER SPECTRA

This paper illustrates some of the consequences of sampling on higher-order spectrum (HOS) analysis, and especially the important difference between deterministic and random stationary signals. In the case of deterministic signals, it provides the conditions enabling the construction of the sampled signal HOS by periodization of the analog signal HOS, in the same way as for random stationary signals. In this last case, it insists on the precautions to be taken in applying digital system identification techniques to actual analog signals. It also proposes a method for performing the simulation of stationary analog random signal sampling as a mean of checking the validity of identification algorithms.