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arXiv 1004.4044cs.ITmath.IT
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Bernoulli-Gaussian信号模型中的稀疏模式恢复

Sparsity Pattern Recovery in Bernoulli-Gaussian Signal Model

Subhojit Som, Lee C Potter

摘要:

在压缩感知中,稀疏信号从欠定噪声线性观测中恢复。最近一段时间吸引了大量关注的有趣问题之一是支持恢复或稀疏模式恢复问题。其目的是识别原始稀疏信号中的非零元素。在这篇文章中,我们考虑稀疏模式恢复问题下的概率信号模型,稀疏支持遵循伯努利分布和信号限制到这个支持遵循高斯分布。我们表明,在原始信号中的能量限制到错过支持的MAP估计是有界的,这个界是能量的顺序在投影的噪声信号的子空间跨越的活性系数。我们还得到了充分的条件,没有误判,没有假警报,支持恢复。

英文摘要:

In compressive sensing, sparse signals are recovered from underdetermined noisy linear observations. One of the interesting problems which attracted a lot of attention in recent times is the support recovery or sparsity pattern recovery problem. The aim is to identify the non-zero elements in the original sparse signal. In this article we consider the sparsity pattern recovery problem under a probabilistic signal model where the sparse support follows a Bernoulli distribution and the signal restricted to this support follows a Gaussian distribution. We show that the energy in the original signal restricted to the missed support of the MAP estimate is bounded above and this bound is of the order of energy in the projection of the noise signal to the subspace spanned by the active coefficients. We also derive sufficient conditions for no misdetection and no false alarm in support recovery.

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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