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Recovering signals from inner products involving prolate spheroidals in the presence of jitter
Authors:Dorota Dabrowska.
Affiliation:Faculty of Mathematics and Science, Cardinal Stefan Wyszynski University in Warsaw, ul. Dewajtis 5, 01-815 Warsaw, Poland
Abstract:The paper deals with recovering band- and energy-limited signals from a finite set of perturbed inner products involving the prolate spheroidal wavefunctions. The measurement noise (bounded by $delta$) and jitter meant as perturbation of the ends of the integration interval (bounded by $gamma$) are considered. The upper and lower bounds on the radius of information are established. We show how the error of the best algorithms depends on $gamma$ and $delta$. We prove that jitter causes error of order $Omega^{frac{3}{2}}gamma$, where $[-Omega,Omega]$ is a bandwidth, which is similar to the error caused by jitter in the case of recovering signals from samples.

Keywords:Problem complexity   signal theory   application of orthogonal functions in communication
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