Regularity of Dual Gabor Windows

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We present a construction of dual windows associated with Gabor frames with compactly supported windows. The size of the support of the dual windows is comparable to that of the given window. Under certain conditions, we prove that there exist dual windows with higher regularity than the canonical dual window. On the other hand, there are cases where no differentiable dual window exists, even in the overcomplete case. As a special case of our results, we show that there exists a common smooth dual window for an interesting class of Gabor frames. In particular, for any value of K is an element of N, there is a smooth function h which simultaneously is a dual window for all B-spline generated Gabor frames {EmbTnBN(x/2)}(m,n is an element of N) for B-splines B-N of order N = 1,..., 2K + 1 with a fixed and sufficiently small value of b.
Publisher
HINDAWI PUBLISHING CORPORATION
Issue Date
2013
Language
English
Article Type
Article
Keywords

FRAMES

Citation

ABSTRACT AND APPLIED ANALYSIS

ISSN
1085-3375
DOI
10.1155/2013/747268
URI
http://hdl.handle.net/10203/223390
Appears in Collection
MA-Journal Papers(저널논문)
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