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• W4383646121 abstract "Nonstationary Gabor (NSG) frames for L 2 ( ℝ ) $$ {L}^2left(mathrm{mathbb{R}}right) $$ allow for flexible sampling and varying window functions and have found applications in adaptive signal analysis. Recently, the first author of this paper generalized the notion of NSG frames for L 2 ( ℝ ) $$ {L}^2left(mathrm{mathbb{R}}right) $$ to the space L 2 ( ℝ , ℂ K ) $$ {L}^2left(mathrm{mathbb{R}},{mathrm{mathbb{C}}}^Kright) $$ of vector-valued signals and investigated the existence of vector-valued NSG (VVNSG) frames. In this paper, we consider the reconstruction of any functions in L 2 ( ℝ , ℂ K ) $$ {L}^2left(mathrm{mathbb{R}},{mathrm{mathbb{C}}}^Kright) $$ from coefficients obtained from VVNSG frames. We provide different approximately dual frames of VVNSG frames and give the corresponding reconstruction error bounds. In particular, for a special class of VVNSG frames that are related to painless VVNSG frames, we show that the approximately dual frames carry the VVNSG structure, which is very important since there exist fast analysis and reconstruction algorithms for VVNSG frames. We also provide a method to construct the special class of VVNSG Bessel sequences. Finally, a constructive example is given to illustrate the theoretical results." @default.
• W4383646121 created "2023-07-09" @default.
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• W4383646121 date "2023-07-08" @default.
• W4383646121 modified "2023-10-15" @default.
• W4383646121 title "Approximately dual frames of vector‐valued nonstationary Gabor frames and reconstruction errors" @default.
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• W4383646121 doi "https://doi.org/10.1002/mma.9476" @default.
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