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arXiv · 2606.31355

Gabor Orthonormal Bases with Maximal Localization and Gabor Frame Operator on Local Fields

Kumar Abhinav·Qaiser Jahan
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Abstract

We provide an explicit construction of a Gabor orthonormal bases for a local field $K$ that provides maximal localization in both time and frequency. Such a localization is not true in case of $\mathbb{R}$ due to the uncertainty principle. In particular, we construct examples of functions $f \in L^2(K)$ such that the support of the ambiguity function of $f$ is of minimum measure. Moreover, we establish a quantitative uncertainty principle for local fields, which follows as a consequence of Lieb's inequalities for general locally compact abelian group. In addition, we develop fundamental operator representations for Gabor systems defined over local fields.

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Kumar Abhinav, Qaiser Jahan. 2026-06-30. Gabor Orthonormal Bases with Maximal Localization and Gabor Frame Operator on Local Fields. https://arxiv.org/abs/2606.31355

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