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- W2059929068 abstract "The well known density theorem in time-frequency analysis establishes the connection between the existence of a Gabor frame G(g,A,B)={e2πi〈Bm,x〉g(x−An):m,n∈Zd} for L2(Rd) and the density of the time-frequency lattice AZd×BZd. This is also tightly related to lattice tiling and packing. In this paper we investigate the density theorem for Gabor systems in L2(S) with S being an AZd-periodic subset of Rd. We characterize the existence of a Gabor frame for L2(S) in terms of a condition that involves the Haar measure of the group generated by AZd and (Bt)−1Zd. This new characterization is used to recover the density theorem and several related known results in the literature. Additionally we apply this approach to obtain the density theorems for multi-windowed and super Gabor frames for L2(S)." @default.
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- W2059929068 date "2013-10-01" @default.
- W2059929068 modified "2023-10-18" @default.
- W2059929068 title "Lattice tiling and density conditions for subspace Gabor frames" @default.
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- W2059929068 doi "https://doi.org/10.1016/j.jfa.2013.05.032" @default.
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