Abstract
The theory of regular wavelet/Gabor frames has been extensively
investigated, including the sufficient and necessary conditions for
regular wavelet/Gabor systems to be frames and the perturbation theorem.
This paper addresses the irregular wavelet/Gabor systems in Sobolev
space Hs(R). The sufficient and necessary conditions for irregular
wavelet/Gabor systems to be frames are presented. As corollaries, under
certain restrictions on the support, we also give the characterization
of irregular wavelet/Gabor systems to be frames. Finally, we discuss the
perturbation theorem of irregular wavelet/Gabor frames.