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arXiv 1002.2586cs.ITmath.IT
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盲压缩感知

Blind Compressed Sensing

Sivan Gleichman, Yonina C. Eldar

摘要:

压缩感知的基本原理是,一个信号,这是稀疏下的一些基本表示,可以从少量的线性测量恢复。然而,先验知识的稀疏基础是必不可少的恢复过程。本文引入了盲压缩感知的概念,避免了在采样和恢复过程中需要知道稀疏基的问题。我们提出了三种可能的限制稀疏的基础上,可以添加到问题,以使其解决方案的唯一性。对于每个约束,我们证明条件的唯一性,并提出了一个简单的方法来检索的解决方案。在唯一性条件下,只要信号足够稀疏,我们通过仿真证明,在不知道稀疏性基础的情况下,我们的方法可以实现类似于标准压缩感知的结果,这依赖于稀疏性基础的先验知识。这提供了一个通用的采样和重建系统,适合所有稀疏信号,无论稀疏的基础上,在这项工作中提出的条件和约束。

英文摘要:

The fundamental principle underlying compressed sensing is that a signal, which is sparse under some basis representation, can be recovered from a small number of linear measurements. However, prior knowledge of the sparsity basis is essential for the recovery process. This work introduces the concept of blind compressed sensing, which avoids the need to know the sparsity basis in both the sampling and the recovery process. We suggest three possible constraints on the sparsity basis that can be added to the problem in order to make its solution unique. For each constraint we prove conditions for uniqueness, and suggest a simple method to retrieve the solution. Under the uniqueness conditions, and as long as the signals are sparse enough, we demonstrate through simulations that without knowing the sparsity basis our methods can achieve results similar to those of standard compressed sensing, which relay on prior knowledge of the sparsity basis. This offers a general sampling and reconstruction system that fits all sparse signals, regardless of the sparsity basis, under the conditions and constraints presented in this work.

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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