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Non-Linear System Identification of a Broadband Subscriber Line Interface Circuit for ADSL-Lite Using the Volterra Approach

Koeppl, H. and Paoli, G.
The Institute of Mathematics and its Applications (IMA) (Corporate Creator) (2000):
Non-Linear System Identification of a Broadband Subscriber Line Interface Circuit for ADSL-Lite Using the Volterra Approach.
In: 5th IMA International Conference on Mathematics in Signal Processing, Warwick, United Kingdom, [Conference or Workshop Item]

Abstract

Making use of the Volterra approach, black box modeling is applied to a large scale analog circuitry for an ADSL (asymmetric digital subscriber line) central o#ce application. Reducing the number of free parameters through special assumptions on the Volterra kernels, one ends up with the Hammerstein model. Taking the first few taps of the Volterra kernels and approximating the last taps through Hammerstein kernels, the Volterra-Hammerstein model is obtained. The parametrization of these models is an inverse problem and leads to an ill-conditioned linear equations system, thus regularization techniques are used. Discrete multi tones (DMT) serve as excitation signals. Data acquisition is done by the analog network simulator SABER # . Emphasis was put on the accuracy of the inter-modulation products, described by a generalized signal to noise ratio. The Hammerstein and the Volterra-Hammerstein models are compared with each other and with meassurements from the laboratory.

Item Type: Conference or Workshop Item
Erschienen: 2000
Creators: Koeppl, H. and Paoli, G.
Title: Non-Linear System Identification of a Broadband Subscriber Line Interface Circuit for ADSL-Lite Using the Volterra Approach
Language: English
Abstract:

Making use of the Volterra approach, black box modeling is applied to a large scale analog circuitry for an ADSL (asymmetric digital subscriber line) central o#ce application. Reducing the number of free parameters through special assumptions on the Volterra kernels, one ends up with the Hammerstein model. Taking the first few taps of the Volterra kernels and approximating the last taps through Hammerstein kernels, the Volterra-Hammerstein model is obtained. The parametrization of these models is an inverse problem and leads to an ill-conditioned linear equations system, thus regularization techniques are used. Discrete multi tones (DMT) serve as excitation signals. Data acquisition is done by the analog network simulator SABER # . Emphasis was put on the accuracy of the inter-modulation products, described by a generalized signal to noise ratio. The Hammerstein and the Volterra-Hammerstein models are compared with each other and with meassurements from the laboratory.

Journal or Publication Title: Proceedings of 5th IMA Conference on Mathematics in Signal Processing
Uncontrolled Keywords: Volterra, ADSL, non-linear system, circuits, DMT
Divisions: 18 Department of Electrical Engineering and Information Technology
18 Department of Electrical Engineering and Information Technology > Institute for Telecommunications > Bioinspired Communication Systems
18 Department of Electrical Engineering and Information Technology > Institute for Telecommunications
Event Title: 5th IMA International Conference on Mathematics in Signal Processing
Event Location: Warwick, United Kingdom
Date Deposited: 04 Apr 2014 13:10
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