Beyond coherence: Recovering structured time–frequency representations
نویسندگان
چکیده
منابع مشابه
Beyond Coherence : Recovering Structured Time - Frequency Representations
We consider the problem of recovering a structured sparse representation of a signal in an overcomplete time-frequency dictionary with a particular structure. For infinite dictionaries that are the union of a nice wavelet basis and a Wilson basis, sufficient conditions are given for the Basis Pursuit and (Orthogonal) Matching Pursuit algorithms to recover a structured representation of an admis...
متن کاملUniversitet Beyond coherence : Recovering structured time - frequency represenatations
We consider the problem of recovering a structured sparse representation of a signal in an overcomplete time-frequency dictionary with a particular structure. For infinite dictionaries that are the union of a nice wavelet basis and a Wilson basis, sufficient conditions are given for the Basis Pursuit and (Orthogonal) Matching Pursuit algorithms to recover a structured representation of an admis...
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We consider the problem of accurately recovering a matrix B of size M ×M , which represents a probability distribution over M2 outcomes, given access to an observed matrix of “counts” generated by taking independent samples from the distribution B. How can structural properties of the underlying matrix B be leveraged to yield computationally efficient and information theoretically optimal recon...
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We consider the problem of recovering l-adic representations from a knowledge of the character values at the Frobenius elements associated to l-adic representations constructed algebraically out of the original representations. These results generalize earlier results in [Ra] concerning refinements of strong multiplicity one for l-adic represntations, and a result of Ramakrishnan [DR] recoverin...
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Much has happened since the 1960s and 1970s when the idea of self-organization emerged and began to alter our conceptions of human nature, of social organization, and of a social science that had heretofore been wedded to linear causal explanations. The experience that systems could organize themselves has been revolutionary and constitutes a paradigm shift that is still ongoing. In the followi...
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ژورنال
عنوان ژورنال: Applied and Computational Harmonic Analysis
سال: 2008
ISSN: 1063-5203
DOI: 10.1016/j.acha.2007.09.002