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Universal Spatiotemporal Sampling Sets for Discrete Spatially Invariant Evolution Processes

机译:离散空间不变演化过程的通用时空采样集

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摘要

Let be a finite abelian group and be a circular convolution operator on . The problem under consideration is how to construct minimal and such that is a frame for , where is the canonical basis of . This problem is motivated by the spatiotemporal sampling problem in discrete spatially invariant evolution processes. We will show that the cardinality of should be at least equal to the largest geometric multiplicity of eigenvalues of , and consider the universal spatiotemporal sampling sets for convolution operators whose eigenvalues subject to the same largest geometric multiplicity. We will give an algebraic characterization for such sampling sets and show how this problem is linked with sparse signal processing theory and polynomial interpolation theory.
机译:令为一个有限阿贝尔群,并为上的圆卷积算子。考虑的问题是如何构造极小数,并以此为框架,是的规范基础。此问题是由离散的空间不变演化过程中的时空采样问题引起的。我们将证明的基数应至少等于特征值的最大几何多重性,并考虑其特征值服从相同最大几何多重性的卷积算子的通用时空采样集。我们将对此类采样集进行代数表征,并说明此问题如何与稀疏信号处理理论和多项式插值理论联系在一起。

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