Stability of the Recovery of Missing Samples in Derivative Oversampling

Details Stability of the Recovery of Missing Samples in Derivative Oversampling Stability of the Recovery of Missing Samples in Derivative Oversampling

2010-09-10

arxiv.org/abs/1009.2028v1

Mathematics

Functional Analysis

17 pages,8 figures

Scientific paper

This paper deals with the problem of reconstructing a band-limited signal when a finite subset of its samples and of its derivative are missing. The technique used, due to P.J.S.G. Ferreira, is based on the use of a particular frame for band-limited functions and the relative oversampling formulas. We study the eigenvalues of the matrices arising in the procedure of recovering the lost samples, finding estimates of their eigenvalues and their dependence on the oversampling parameter and on the number of missing samples. When the missing samples are consecutive, the problem may become very ill-conditioned. We present a numerical procedure to overcome this difficulty, also in presence of noisy data, by using Tikhonov regularization techniques.

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