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A Sampling Theorem for Symmetric Polygons

机译:对称多边形的采样定理

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摘要

We present a simple construction of a set of uniqueness for the Paley-Wiener space of functions bandlimited to a symmetric 2N-sided polygonal region in the plane which consists of a union of at most N - 1 shifted lattices in the plane. The idea of the proof involves an application of a technique set forth in [2] that is based on decomposing such a bandlimited function into a combination of functions bandlimited to smaller sets. We also give a sufficient condition under which the set in question is a set of sampling and interpolation for the Paley-Wiener space and hence corresponds to a Riesz basis. This result differs from previous work on this topic, notably in [7], in that the technique is quite different and fewer shifted lattices are required.
机译:我们向Paley-Wiener空间呈现了一组唯一性的简单结构,该函数的Paley-Wiener空间带入到平面中的对称的2N面多边形区域,该区域由平面中最多N-1移位格子的联合组成。证据的想法涉及[2]中阐述的技术,该技术基于将这种带状函数分解成带有较小集合的功能的组合。我们还提供了一种充分的条件,其中所讨论的设定是Paley-Wiener空间的一组采样和插值,因此对应于RIESZ基础。此结果与先前的工作不同,特别是在[7]中,在[7]中,该技术是完全不同的,需要更少的偏移格子。

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