Hermite interpolation theorems for band-limited functions of the linear canonical transforms with equidistant samples

Abstract

AbstractWe establish convergence analysis for Hermite-type interpolations for$$L^{2} ( \mathbb {R})$$L2(R)-entire functions of exponential type whose linear canonical transforms (LCT) are compactly supported. The results bridges the theoretical gap in implementing the derivative sampling theorems for band-limited signals in the LCT domain. Both complex analysis and real analysis techniques are established to derive the convergence analysis. The truncation error is also investigated and rigorous estimates for it are given. Nevertheless, the convergence rate is$$O(1/\sqrt{N})$$O(1/N), which is slow. Consequently the work on regularization techniques is required.