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摘要:
In digital signal and image processing one can only process discrete signals of finite length, and the space C-L is the preferred setting. Recently, Kutyniok and Strohmer constructed orthonormal Wilson bases for C-L with general lattices of volume L/2 ( L even). In this paper, we extend this construction to Wilson frames for C-L with general lattices of volume L/2K, where K is an element of N and L is an element of 2KN. We obtain a necessary and sufficient condition for two sequences having Wilson structure to be dual frames for C-L. When the window function satisfies some symmetry property, we obtain a characterization of a Wilson system to be a tight frame for C-L, show that a Wilson frame for C-L can be derived from the underlying Gabor frame, and that the dual frame having Wilson structure can also be derived from the canonical Gabor dual of the underlying Gabor frame.
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来源 :
INTERNATIONAL JOURNAL OF WAVELETS MULTIRESOLUTION AND INFORMATION PROCESSING
ISSN: 0219-6913
年份: 2016
期: 6
卷: 14
1 . 4 0 0
JCR@2022
ESI学科: COMPUTER SCIENCE;
ESI高被引阀值:167
中科院分区:4
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