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arXiv 2008.08964math.FA
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$L^2(\mathbb R)$中的分数阶双正交小波

Fractional Biorthogonal wavelets in $L^2(\mathbb R)$

Owais Ahmad, Neyaz A. Sheikh, Firdous A. Shah

摘要:

分数阶傅里叶变换(FrFT)是傅里叶变换的推广,由于其在电学和光学等领域的应用,近年来成为众多研究论文的热点。本文在$\mathbb{R}$上引入分数阶双正交小波的概念,得到了单个函数的平移构成其闭线性跨度的分数阶Riesz基的充要条件.我们还提供了一个完整的分数双正交的分数尺度函数的两个分数MRA和相关的分数双正交小波族的平移的特征。此外,在对分数阶尺度函数和相应的分数阶小波的适当假设下,我们证明了分数阶小波可以生成$L^2(\mathbb R).$的Reisz基.

英文摘要:

The fractional Fourier transform (FrFT), which is a generalization of the Fourier transform, has become the focus of many research papers in recent years because of its applications in electrical engineering and optics. In this paper, we introduce the notion of fractional biorthogonal wavelets on $\mathbb{R}$ and obtain the necessary and sufficient conditions for the translates of a single function to form the fractional Riesz bases for their closed linear span. We also provide a complete characterization for the fractional biorthogonality of the translates of fractional scaling functions of two fractional MRAs and the associated fractional biorthogonal wavelet families. Moreover, under mild assumptions on the fractional scaling functions and the corresponding fractional wavelets, we show that the fractional wavelets can generate Reisz bases for $L^2(\mathbb R).$.

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。

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