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arXiv · 1308.5249

A Note on Sparsification by Frames

Christopher A. Baker
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Abstract

The purpose of this note is to establish a new generalized Dictionary-Restricted Isometry Property (D-RIP) sparsity bound constant for compressed sensing. For fulfilling D-RIP, the constant $\delta_k$ is used in the definition: $(1 -\delta_k)\|D v\|_2^2 \le \|\Phi D v\|_2^2 \le (1 + \delta_k)\|D v\|^2$. We prove that signals with $k$-sparse $D$-representation can be reconstructed if $\delta_{2k} < \frac{2}3$. The approach in this note can be extended to obtain other D-RIP bounds (i.e., $\delta_{tk}$).

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Christopher A. Baker. 2013-08-23. A Note on Sparsification by Frames. https://arxiv.org/abs/1308.5249

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