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☆
DOI:
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发表时间:
2000
期刊:
影响因子:
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通讯作者:
R. Gundy
中科院分区:
文献类型:
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作者:
R. Gundy
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.