کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4605034 | 1337540 | 2015 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
On Gabor frames generated by sign-changing windows and B-splines
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موضوعات مرتبط
مهندسی و علوم پایه
ریاضیات
آنالیز ریاضی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
For a class of compactly supported windows we characterize the frame property for a Gabor system {EmbTnag}m,n∈Z{EmbTnag}m,n∈Z, for translation parameters a belonging to a certain range depending on the support size. We show that the obstructions to the frame property are located on a countable number of “curves.” For functions that are positive on the interior of the support these obstructions do not appear, and the considered region in the (a,b)(a,b) plane is fully contained in the frame set. In particular this confirms a recent conjecture about B-splines by Gröchenig in that particular region. We prove that the full conjecture is true if it can be proved in a certain “hyperbolic strip.”
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied and Computational Harmonic Analysis - Volume 39, Issue 3, November 2015, Pages 534–544
Journal: Applied and Computational Harmonic Analysis - Volume 39, Issue 3, November 2015, Pages 534–544
نویسندگان
Ole Christensen, Hong Oh Kim, Rae Young Kim,