Linear-quadratic system identification with completed frequency domain region of support

Author

Tseng, Yi-Chyun ; Linebarger, Darel A.

Author_Institution

DSC Commun. Corp., Plano, TX, USA

Volume

43

Issue

1

fYear

1995

fDate

1/1/1995 12:00:00 AM

Firstpage

254

Lastpage

261

Abstract

In general, aliasing exists in the output of discrete-time nonlinear systems due to the higher order harmonics and intermodulation among inputs. If the input is allowed to cover the full range from DC to half the sample rate, the aliased components in the output must be taken into account for accurate system identification. We have extended a known system identification method to account for these aliased terms by completing the region of support for the quadratic transfer function. We also present a method for preventing a form of time domain aliasing. Together, these approaches can lead to significantly improved system characterization with less data as compared to current techniques

Keywords

discrete time systems; frequency-domain analysis; identification; intermodulation; linear systems; signal sampling; transfer functions; aliased components; discrete-time nonlinear systems; frequency domain region; higher order harmonics; intermodulation; linear quadratic system identification; quadratic transfer function; sample rate; signal sampling; time domain aliasing; Bandwidth; Continuous time systems; Discrete time systems; Equations; Frequency domain analysis; Frequency estimation; Nonlinear systems; Stochastic processes; System identification; Transfer functions;

fLanguage

English

Journal_Title

Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1053-587X

Type

jour

DOI

10.1109/78.365305

Filename

365305