Abstract
In this paper, we study matrix-valued wave packet frames for the matrix-valued function space \(L^2({\mathbb {R}}^d, {\mathbb {C}}^{s\times r})\). An interplay between matrix-valued wave packet frames and its associated atomic wave packet frames is discussed. This is inspired by examples which show that frame properties cannot be carried from matrix-valued wave packet scaling functions to its associated atomic wave packet scaling functions and vice versa. Construction of matrix-valued wave packet frames for \(L^2({\mathbb {R}}^d, {\mathbb {C}}^{s\times r})\) from corresponding atomic wave packet frames for \(L^2({\mathbb {R}}^d)\) (and conversely) are given. Some special classes of matrix-valued scaling functions are given. A characterization of tight matrix-valued wave packet frames in terms of orthogonality of Bessel sequences has been obtained. Further, we provide a characterization of superframes which can generate matrix-valued frames. Finally, a Paley-Wiener type perturbation result with respect to matrix-valued wave packet scaling functions is given.
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The research of Jyoti is supported by the Council of Scientific & Industrial Research (CSIR), India, Grant No. 09/045(1374)/2015-EMR-I.
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Jyoti, Vashisht, L.K. On matrix-valued wave packet frames in \(L^2({\mathbb {R}}^d, {\mathbb {C}}^{s\times r})\). Anal.Math.Phys. 10, 66 (2020). https://doi.org/10.1007/s13324-020-00417-9
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DOI: https://doi.org/10.1007/s13324-020-00417-9