Volume 5, 1998Fractional Differential Systems: Models, Methods and Applications
|Page(s)||119 - 130|
|Published online||15 August 2002|
Fractional noises: diffusive model for CCD imager band-pass acquisition chain
CIMI group, Electronic dept., ENSAE (Supaero), 31400 Toulouse Cedex, France
2 ABB corporate research, electronic systems dept., p.o. Box 90, N-1361 Billingstad, Norway
Charge-Coupled Devices often deliver non standard noises, with a power spectrum proportional to a real power of 1/f over several decades (depending on biasing and temperature). On the other hand, CCD signal acquisition systems are frequently non stationary in their structure: the Wiener-Kintchin theorem is not valid for evaluating noise power and signal to noise ratio. In this paper, the chain is seen as a continuous state-variable time-varying system with a fractional-noise input, modelled from a diffusive representation of fractional integrators.
© EDP Sciences, ESAIM, 1998
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