Time-Frequency Analysis of Fourier Integral Operators

Details Time-Frequency Analysis of Fourier Integral Operators Time-Frequency Analysis of Fourier Integral Operators

2007-10-19

arxiv.org/abs/0710.3652v1

Mathematics

Analysis of PDEs

Scientific paper

We use time-frequency methods for the study of Fourier Integral operators (FIOs). In this paper we shall show that Gabor frames provide very efficient representations for a large class of FIOs. Indeed, similarly to the case of shearlets and curvelets frames, the matrix representation of a Fourier Integral Operator with respect to a Gabor frame is well-organized. This is used as a powerful tool to study the boundedness of FIOs on modulation spaces. As special cases, we recapture boundedness results on modulation spaces for pseudo-differential operators with symbols in $M^{\infty,1}$, for some unimodular Fourier multipliers and metaplectic operators.

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