Papers › On the frame set of the second-order B-spline
On the frame set of the second-order B-spline
A. Ganiou D. Atindehou, Christina Frederick, Yébéni B. Kouagou, Kasso A. Okoudjou
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The frame set of a function g∈L²(ℝ) is the set of all parameters (a, b)∈ℝ²_+ for which the collection of time-frequency shifts of g along aℤ×bℤ form a Gabor frame for L²(ℝ). Finding the frame set of a given function remains a challenging open problem in time-frequency analysis. In this paper, we establish new regions of the frame set of the second order $B-$spline. Our method relies on the compact support of this function to partition a subset of the putative frame set and find an explicit dual window function in each of the partition regions. Numerical evidence indicates the existence of further points belonging to the frame set.
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