Guaranteed Sparse Recovery under Linear Transformation     Guaranteed  Sparse Recovery  Linear Transformation       font style='font-size:12px;'> 2013/6/13

We consider the following signal recovery problem: given a measurement matrix $\Phi\in \mathbb{R}^{n\times p}$ and a noisy observation vector $c\in \mathbb{R}^{n}$ constructed from $c = \Phi\theta^* +...

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Sparse approximation and recovery by greedy algorithms in Banach spaces     Sparse approximation  recovery   greedy algorithms  Banach spaces       font style='font-size:12px;'> 2013/4/28

We study sparse approximation by greedy algorithms. We prove the Lebesgue-type inequalities for the Weak Chebyshev Greedy Algorithm (WCGA), a generalization of the Weak Orthogonal Matching Pursuit to ...

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