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arXiv 1306.1356cs.ITmath.IT
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分析$\ell_1$ -使用帧和高斯测量进行恢复

Analysis $\ell_1$-recovery with frames and Gaussian measurements

Holger Rauhut, Maryia Kabanava

摘要:

本文提供了新的结果恢复信号的欠采样测量的基础上分析$\ell_1$ -最小化,当分析算子是由一个框架。我们都提供了所谓的均匀和非均匀恢复保证cosparse(分析稀疏)信号使用高斯随机测量矩阵。非均匀结果依赖于通过切锥的恢复条件,并且均匀恢复保证基于零空间属性的分析版本。检查高斯随机矩阵的这些条件导致成功恢复所需的测量数量的精确界限。在标准稀疏的特殊情况下,我们的结果提高了一个界限,由于Rudelson和Vershynin关于精确重建稀疏信号从高斯测量相对于常数,并将其扩展到稳定性下通过近似稀疏信号和噪声下的测量的鲁棒性。

英文摘要:

This paper provides novel results for the recovery of signals from undersampled measurements based on analysis $\ell_1$-minimization, when the analysis operator is given by a frame. We both provide so-called uniform and nonuniform recovery guarantees for cosparse (analysis-sparse) signals using Gaussian random measurement matrices. The nonuniform result relies on a recovery condition via tangent cones and the uniform recovery guarantee is based on an analysis version of the null space property. Examining these conditions for Gaussian random matrices leads to precise bounds on the number of measurements required for successful recovery. In the special case of standard sparsity, our result improves a bound due to Rudelson and Vershynin concerning the exact reconstruction of sparse signals from Gaussian measurements with respect to the constant and extends it to stability under passing to approximately sparse signals and to robustness under noise on the measurements.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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