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arXiv 1206.2197cs.ITcs.NAmath.ITmath.NAstat.ML
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复正交匹配追踪及其精确恢复条件

Complex Orthogonal Matching Pursuit and Its Exact Recovery Conditions

UESTC(电子科技大学)

Rong Fan, Qun Wan, Yipeng Liu, Hui Chen, Xiao Zhang

AI总结:

本文针对复数情况(复测量向量、复字典和复加性高斯白噪声),提出正交匹配追踪(OMP)在无噪声和有界高斯噪声下精确恢复稀疏信号的条件,并推导了复数情况下的精确恢复条件(ERC)。

摘要:

在本文中,我们提出了关于使用正交匹配追踪(OMP)解决复数情况下(即复测量向量、复字典和复加性高斯白噪声(CAWGN))过完备字典上的稀疏逼近问题的新结果。在无噪声和有界高斯噪声设置下,我们提出了OMP在复数情况下能够恢复精确稀疏信号的最优表示的充分条件。类似于实数情况下的精确恢复条件(ERC)结果,我们将其扩展到复数情况,并在本文中推导了相应的ERC。该理论表明,对于一类复数字典,OMP能够成功恢复k-稀疏信号。此外,还给出了一个基于几何绕射理论(GTD)模型的复数应用实例。最后,仿真实验验证了理论分析的有效性。

英文摘要:

In this paper, we present new results on using orthogonal matching pursuit (OMP), to solve the sparse approximation problem over redundant dictionaries for complex cases (i.e., complex measurement vector, complex dictionary and complex additive white Gaussian noise (CAWGN)). A sufficient condition that OMP can recover the optimal representation of an exactly sparse signal in the complex cases is proposed both in noiseless and bound Gaussian noise settings. Similar to exact recovery condition (ERC) results in real cases, we extend them to complex case and derivate the corresponding ERC in the paper. It leverages this theory to show that OMP succeed for k-sparse signal from a class of complex dictionary. Besides, an application with geometrical theory of diffraction (GTD) model is presented for complex cases. Finally, simulation experiments illustrate the validity of the theoretical analysis.

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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