On Wilson Bases in L2(ℝd)
On Wilson Bases in L2(ℝd)
复制标题
关于 L2(ℝd) 中的威尔逊基
DOI:
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发表时间:
2017
影响因子:
2
通讯作者:
K. Okoudjou
中科院分区:
文献类型:
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作者:
Marcin Bownik;Mads S. Jakobsen;J. Lemvig;K. Okoudjou
A Wilson system is a collection of finite linear combinations of time frequency shifts of a square integrable function. It is well known that, starting from a tight Gabor frame for $L^{2}(mathbb{R})$ with redundancy 2, one can construct an orthonormal Wilson basis for $L^2(mathbb{R})$ whose generator is well localized in the time-frequency plane. In this paper we use the fact that a Wilson system is a shift-invariant system to explore its relationship with Gabor systems. Specifically, we show that one can construct $d$-dimensional orthonormal Wilson bases starting from tight Gabor frames of redundancy $2^k$, where $k=1, 2, hdots, d$. These results generalize most of the known results about the existence of orthonormal Wilson bases.