Uncertainty Relation of Functions for Kernel-based Transforms Obtained in Quantum Mechanics

In this paper, the generic uncertainty relation (UR) for kernel-based transformations (KT) of signals is derived. Instead of using the statistics approach as shown in the literature before, here we employ quantum mechanical operator approach for directly deriving the UR for KT's. We are able to do this because we have found the quantum operator realization of KT. Our new method is concise and applicable to any kinds of KT's with continuous and discrete parameters and variables. An explicit result of UR for a family of KT's including FrFT, generalized fractional transformation (GFrT) and linear canonical transformation (LCT) is provided as an application of our new method.