Banach Gabor frames with Hermite functions: polyanalytic spaces from the Heisenberg group

Abstract

Gabor frames with Hermite functions are equivalent to sampling sequences in true Fock spaces of polyanalytic functions. In the L ²-case, such an equivalence follows from the unitarity of the polyanalytic Bargmann transform. We will introduce Banach spaces of polyanalytic functions and investigate the mapping properties of the polyanalytic Bargmann transform on modulation spaces. By applying the theory of coorbit spaces and localized frames to the Fock representation of the Heisenberg group, we derive explicit polyanalytic sampling theorems which can be seen as a polyanalytic version of the lattice sampling theorem discussed by J.M. Whittaker in Chapter 5 of his book Interpolatory Function Theory.

Keywords:

• Gabor frames
• Heisenberg group
• Hermite functions
• polyanalytic functions
• coorbit and localization theory
• Fock spaces

AMS Subject Classifications::

• 46E22
• 33C45
• 81S30
• 30H05
• 41A05
• 42C15

Acknowledgements

L.D. Abreu's research was partially supported by CMUC/FCT and FCT project PTDC/MAT/114394/2009, POCI 2010 and FSE. K. Gröchenig was supported in part by the National Research Network S106 SISE of the Austrian Science Foundation (FWF).