Gabor frames for rational functions
Speaker:
Yurii Lyubarskii, Sankt Petersburg State University
Date and Time:
Thursday, September 16, 2021 - 11:00am to 11:50am
Location:
Online
Abstract:
We study the frame property of the Gabor system of time-frequency shifts
G(g;α,β):={e2πiββmxg(x−nα)}m,n∈Z
generated by rational windows g. In particular we prove that for Herhlotz functions g the system G(g;α,β) constitutes a frame in L2(R) for all lattices αZ×βZ of density at least 1, αβ≤1. In addition, we prove that for general rational windows g the Gabor system G(g;α,β) is a frame for all irrational densities αβ<1.