English

Recovering functions from the modulation spaces $\mathscr{F}W$

Classical Analysis and ODEs 2015-01-13 v1

Abstract

In this short note we show that functions in the modulation space FW={f:jZnf^(+2πj)L([π,π]n)<}\mathscr{F}W=\{ f: \sum_{j\in\mathbb{Z}^n}\| \hat{f}(\cdot+2\pi j)\|_{L_\infty([-\pi,\pi]^n)}<\infty \} enjoy similar recovery properties as band-limited functions. If {ϕα}\{\phi_\alpha\} is a regular family of cardinal interpolators, then one can build an approximand of ff using the fundamental functions corresponding to ϕα\phi_\alpha. Then taking the appropriate limit, one recovers ff both in norm and pointwise.

Keywords

Cite

@article{arxiv.1501.02312,
  title  = {Recovering functions from the modulation spaces $\mathscr{F}W$},
  author = {Jeff Ledford},
  journal= {arXiv preprint arXiv:1501.02312},
  year   = {2015}
}

Comments

About 6 pages

R2 v1 2026-06-22T07:57:02.346Z