arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1409.2303cs.ITmath.IT
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基于贝叶斯框架的压缩感知性能分析

Compressed Sensing Performance Analysis via Replica Method using Bayesian framework

Solomon A. Tesfamicael, Bruhtesfa E. Godana, Faraz Barzideh

摘要:

压缩感知(Compressive Sensing,CS)是一种在信号稀疏或在某个域稀疏时以低于奈奎斯特采样率的速率捕获信号的新方法。本文利用统计力学中的工具,特别是复制方法,分析了CS估计器的性能。该方法已用于分析码分多址(CDMA)和多输入多输出(MIMO)等大规模通信系统。可拓分析是分析大型系统的一种有效工具,现已得到严格的证明。具体而言,我们分析了一些估计的性能,如LASSO(最小绝对收缩和选择算子)估计和零范数正则化估计作为一种特殊情况下的最大后验(MAP)估计,通过使用贝叶斯框架连接的CS估计和复制方法。我们使用副本对称(RS)和一步副本对称破缺(1RSB)两种方法,clamming后者是有效的,当问题不是凸的。这部作品在形式上更具分析性。将其推迟到下一步,以关注数值结果。

英文摘要:

Compressive sensing (CS) is a new methodology to capture signals at lower rate than the Nyquist sampling rate when the signals are sparse or sparse in some domain. The performance of CS estimators is analyzed in this paper using tools from statistical mechanics, especially called replica method. This method has been used to analyze communication systems like Code Division Multiple Access (CDMA) and multiple input multi- ple output (MIMO) systems with large size. Replica analysis, now days rigorously proved, is an efficient tool to analyze large systems in general. Specifically, we analyze the performance of some of the estimators used in CS like LASSO (the Least Absolute Shrinkage and Selection Operator) estimator and Zero-Norm regularizing estimator as a special case of maximum a posteriori (MAP) estimator by using Bayesian framework to connect the CS estimators and replica method. We use both replica symmetric (RS) ansatz and one-step replica symmetry breaking (1RSB) ansatz, clamming the latter is efficient when the problem is not convex. This work is more analytical in its form. It is deferred for next step to focus on the numerical results.

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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