Comparison of discrete-time approximations for continuous-time nonlinear systems
| Autor: | Heinz Koeppl, D. Schwingshackl |
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| Předmět: |
Signal processing
Volterra series Physical system Volterra integral equation Causality (physics) symbols.namesake Nonlinear system Nonlinear Sciences::Exactly Solvable and Integrable Systems Discrete time and continuous time Control theory symbols Quantitative Biology::Populations and Evolution Applied mathematics Representation (mathematics) Mathematics |
| Zdroj: | ICASSP (2) Scopus-Elsevier |
| Popis: | This work addresses the problem of approximating the sampled input-output (i/o) behavior of continuous-time nonlinear systems using discrete-time Volterra models. For an exactly band-limited nonlinear system for which a Volterra representation exists, the discrete-time Volterra model exactly corresponds to the sampled continuous-time Volterra kernels. Physical systems, as they are causal, are never exactly band-limited. Thus, a modeling error is introduced. By relaxing the causality condition and allowing a small processing delay, it is shown through simulation that more accurate discrete-time Volterra models, compared to sampled continuous-time Volterra models, can be generated. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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