Abstract
A new class of alternative dual frames is introduced in the setting of finite frames for ℝd. These dual frames, called Sobolev duals, provide a high precision linear reconstruction procedure for Sigma-Delta (ΣΔ) quantization of finite frames. The main result is summarized as follows: reconstruction with Sobolev duals enables stable rth order Sigma-Delta schemes to achieve deterministic approximation error of order \(\mathcal{O}(N^{-r})\) for a wide class of finite frames of size N. This asymptotic order is generally not achievable with canonical dual frames. Moreover, Sobolev dual reconstruction leads to minimal mean squared error under the classical white noise assumption.
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Communicated by Peter Casazza.
M. Lammers was supported in part by a Cahill Grant from UNCW. A.M. Powell was supported in part by NSF Grant DMS-0811086. Ö. Yılmaz was supported in part by a Discovery Grant from NSERC Canada.
An erratum to this article can be found at http://dx.doi.org/10.1007/s00041-010-9120-y
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Blum, J., Lammers, M., Powell, A.M. et al. Sobolev Duals in Frame Theory and Sigma-Delta Quantization. J Fourier Anal Appl 16, 365–381 (2010). https://doi.org/10.1007/s00041-009-9105-x
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DOI: https://doi.org/10.1007/s00041-009-9105-x