We provide a comprehensive overview of the theoretical framework surrounding modulation spaces and their characterizations, particularly focusing on the role of metaplectic operators and time-frequency representations. We highlight the metaplectic action which is hidden in their construction and guarantees equivalent (quasi-)norms for such spaces. In particular, this work provides new characterizations via the sub- manifold of shift-invertible symplectic matrices. Similar results hold for the Wiener amalgam spaces.
Excursus on modulation spaces via metaplectic operators and related time-frequency representations / Cordero, Elena, Giacchi, Gianluca. - In: SAMPLING THEORY, SIGNAL PROCESSING, AND DATA ANALYSIS. - ISSN 2730-5716. - STAMPA. - 22:(2024), pp. 9.1-9.18. [10.1007/s43670-024-00085-x]
Excursus on modulation spaces via metaplectic operators and related time-frequency representations
Giacchi Gianluca
2024
Abstract
We provide a comprehensive overview of the theoretical framework surrounding modulation spaces and their characterizations, particularly focusing on the role of metaplectic operators and time-frequency representations. We highlight the metaplectic action which is hidden in their construction and guarantees equivalent (quasi-)norms for such spaces. In particular, this work provides new characterizations via the sub- manifold of shift-invertible symplectic matrices. Similar results hold for the Wiener amalgam spaces.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.