Low-Pass Filters, Martingales, and Multiresolution Analyses☆

Low-Pass Filters, Martingales, and Multiresolution Analyses☆
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低通滤波器、鞅和多分辨率分析☆

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发表时间:
2000
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通讯作者:
R. Gundy
R. Gundy
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作者:
R. Gundy

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由A.Cohen(Ann)给出了三角多项式是低通滤波器的充要条件。安装H.庞加莱肛门。7(1990),439-459)和W.Lawton(J.Math.物理31(1990),1898-1901)。我们遵循Lawton的方法,给出了任意周期函数是低通滤波器的充要条件。这项技术也适用于产生Riesz基的函数。
Abstract Necessary and sufficient conditions for a trigonometric polynomial to be a low-pass filter have been given by A. Cohen (Ann. Inst. H. Poincare Anal. Nonlineaire7 (1990), 439–459) and W. Lawton (J. Math. Phys.31 (1990), 1898–1901). We give necessary and sufficient conditions for an arbitrary periodic function to be a low-pass filter, following the approach of Lawton. The technique also applies to functions that give rise to a Riesz basis.