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• W1855265535 abstract "The classical assumption in sampling and spline theories is that the input signal is square-integrable, which prevents us from applying such techniques to signals that do not decay or even grow at infinity. In this paper, we develop a sampling theory for multidimensional non-decaying signals living in weighted Lp spaces. The sampling and reconstruction of an analog signal can be done by a projection onto a shift-invariant subspace generated by an interpolating kernel. We show that, if this kernel and its biorthogonal counterpart are elements of appropriate hybrid-norm spaces, then both the sampling and the reconstruction are stable. This is an extension of earlier results by Aldroubi and Gröchenig. The extension is required because it allows us to develop the theory for the ideal sampling of non-decaying signals in weighted Sobolev spaces. When the d-dimensional signal and its d/p+ε derivatives, for arbitrarily small ε>0, grow no faster than a polynomial in the Lp sense, the sampling operator is shown to be bounded even without a sampling kernel. As a consequence, the signal can also be interpolated from its samples with a nicely behaved interpolating kernel." @default.
• W1855265535 created "2016-06-24" @default.
• W1855265535 creator A5027830035 @default.
• W1855265535 creator A5060770511 @default.
• W1855265535 date "2017-07-01" @default.
• W1855265535 modified "2023-10-12" @default.
• W1855265535 title "A sampling theory for non-decaying signals" @default.
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• W1855265535 doi "https://doi.org/10.1016/j.acha.2015.10.006" @default.
• W1855265535 hasPublicationYear "2017" @default.
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