Signal aliasing in system identification

1 September 1975

journal article
research article
Published by Taylor & Francis in International Journal of Control

Vol. 22 (3) , 363-375
https://doi.org/10.1080/00207177508922089

Abstract

Signal aliasing in the digital identification of continuous systems is considered. Parametric identification methods are seen to be free of aliasing errors, provided that the poles of the continuous system are known to lie in specific s-plane regions. In the case of non-parametric identification, frequency response estimates based upon digital techniques are shown to be seriously distorted by signal aliasing. In particular, aliasing errors are shown to be phase sensitive and can therefore be controlled by suitable equalization of the relative phase of observed input-output signals.

Keywords

This publication has 3 references indexed in Scilit:

Coupled design of test signals, sampling intervals, and filters for system identification
IEEE Transactions on Automatic Control, 1974
On the choice of sampling rates in parametric identification of time series
Information Sciences, 1969
On the statistical estimation of frequency response function
Annals of the Institute of Statistical Mathematics, 1962