We study a class of quadratic time-frequency representations that, roughly speaking, are obtained by linear perturbations of the Wigner transform. They satisfy Moyal’s formula by default and share many other properties with the Wigner transform, but in general they do not belong to Cohen’s class. We provide a characterization of the intersection of the two classes. To any such time-frequency representation, we associate a pseudodifferential calculus. We investigate the related quantization procedure, study the properties of the pseudodifferential operators, and compare the formalism with that of the Weyl calculus.

Linear Perturbations of the Wigner Transform and the Weyl Quantization

Cordero E.;Trapasso S. I.
2020-01-01

Abstract

We study a class of quadratic time-frequency representations that, roughly speaking, are obtained by linear perturbations of the Wigner transform. They satisfy Moyal’s formula by default and share many other properties with the Wigner transform, but in general they do not belong to Cohen’s class. We provide a characterization of the intersection of the two classes. To any such time-frequency representation, we associate a pseudodifferential calculus. We investigate the related quantization procedure, study the properties of the pseudodifferential operators, and compare the formalism with that of the Weyl calculus.
2020
Advances in Microlocal and Time-Frequency Analysis
Birkhauser
79
120
978-3-030-36137-2
978-3-030-36138-9
Cohen’s class; Modulation space; Pseudodifferential operator; Quantization; Time-frequency analysis; Wigner distribution
Bayer D.; Cordero E.; Grochenig K.; Trapasso S.I.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1734840
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