arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1302.0635cs.ITmath.IT
收藏

基于紧框架的统计压缩感知投影设计

Projection Design For Statistical Compressive Sensing: A Tight Frame Based Approach

Wei Chen, Miguel R. D. Rodrigues, Ian Wassell

摘要:

在本文中,我们开发了一个框架来设计传感矩阵的压缩感知应用,导致良好的均方误差(MSE)性能的传感成本约束。通过利用oracle估计器的MSE,其性能已被证明是标准稀疏恢复算法性能的基准,我们使用的事实是,一个Parseval紧框架是最接近的设计-在弗罗贝纽斯规范意义上-涉及优化问题的凸松弛的解决方案,该优化问题涉及相对于等价的感测矩阵,受到感测能量约束。基于这个结果,我们提出了两个具有两个关键性质的感知矩阵设计:i)设计是封闭形式而不是迭代的; ii)这些设计相对于文献中的其他设计表现出优异的性能,这是通过我们在各种场景中使用不同稀疏恢复算法(包括基追踪去噪(BPDN))的数值研究揭示的,Dantzig选择器和正交匹配追踪(OMP)。

英文摘要:

In this paper, we develop a framework to design sensing matrices for compressive sensing applications that lead to good mean squared error (MSE) performance subject to sensing cost constraints. By capitalizing on the MSE of the oracle estimator, whose performance has been shown to act as a benchmark to the performance of standard sparse recovery algorithms, we use the fact that a Parseval tight frame is the closest design - in the Frobenius norm sense - to the solution of a convex relaxation of the optimization problem that relates to the minimization of the MSE of the oracle estimator with respect to the equivalent sensing matrix, subject to sensing energy constraints. Based on this result, we then propose two sensing matrix designs that exhibit two key properties: i) the designs are closed form rather than iterative; ii) the designs exhibit superior performance in relation to other designs in the literature, which is revealed by our numerical investigation in various scenarios with different sparse recovery algorithms including basis pursuit de-noise (BPDN), the Dantzig selector and orthogonal matching pursuit (OMP).

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。

↑