Shift-modulation invariant spaces on LCA groups
A (K;?) shift-modulation invariant space is a subspace of L 2(G) that is invariant under translations along elements in K and modulations by elements in ?. Here G is a locally compact abelian group, and K and ? are closed subgroups of G and the dual group ^ G, respectively. We provide a characteriza...
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| Autores principales: | , |
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| Formato: | JOUR |
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_00393223_v211_n1_p1_Cabrelli |
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| Sumario: | A (K;?) shift-modulation invariant space is a subspace of L 2(G) that is invariant under translations along elements in K and modulations by elements in ?. Here G is a locally compact abelian group, and K and ? are closed subgroups of G and the dual group ^ G, respectively. We provide a characterization of shift-modulation invariant spaces when K and ? are uniform lattices. This extends previous results known for L 2(R d). We develop berization techniques and suitable range functions adapted to LCA groups needed to provide the desired characterization. © Instytut Matematyczny PAN, 2012. |
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