Bahri+Ashino: Some Properties of Windowed Linear Canonical Transform and its Logarithmic Uncertainty Principle


Mawardi Bahri and R. Ashino, Some Properties of Windowed Linear Canonical Transform and its Logarithmic Uncertainty Principle, International Journal of  Wavelets, Multiresolution, and Information Processing, 14(3) (2016), 21 pages. http://www.worldscientific.com/doi/abs/10.1142/S0219691316500156

Abstract: Based on the relationship between the Fourier transform (FT) and linear canonical transform (LCT), a logarithmic uncertainty principle and Hausdorff–Young inequality in the LCT domains are derived. In order to construct the windowed linear canonical transform (WLCT), Gabor filters associated with the LCT is introduced. Using the basic connection between the classical windowed Fourier transform (WFT) and the WLCT, a new proof of inversion formula for the WLCT is provided. This relation allows us to derive Lieb’s uncertainty principle associated with the WLCT. Some useful properties of the WLCT such as bounded, shift, modulation, switching, orthogonality relation, and characterization of range are also investigated in detail. By the Heisenberg uncertainty principle for the LCT and the orthogonality relation property for the WLCT, the Heisenberg uncertainty principle for the WLCT is established. This uncertainty principle gives information how a complex function and its WLCT relate. Lastly, the logarithmic uncertainty principle associated with the WLCT is obtained.

Keywords: Complex-valued function; windowed linear canonical transform; logarithmic uncertainty principle
AMSC: 11R52, 42C40, 30G35

Source: http://www.worldscientific.com/doi/abs/10.1142/S0219691316500156

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