Sparse Dual Frames and Dual Gabor Functions of Minimal Time and Frequency Supports |
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| Authors: | Shidong Li Yulong Liu Tiebin Mi |
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| Institution: | 1. Department of Mathematics, San Francisco State University, San Francisco, CA, 94132, USA
2. School of Information, Renmin University of China, Beijing, 100872, China
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| Abstract: | Exploitation of the optimality of (non-exact) frames from a sparse dual point of view is presented. Sparse dual frames and dual Gabor functions of the minimal time and/or frequency supports are studied and constructed through the notion of sparse representations. Conditions on the sparsest dual frames and the dual Gabor functions of the minimal time and/or frequency supports are discussed. Algorithms and examples are provided. |
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