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- W2138659128 abstract "The uncertainty principle is an important and powerful tool, with many applications in signal processing. This paper presents two concentration uncertainty principles for signals on the sphere which relate the localization of the concentration of a signal in spatial and spectral domains, as an analogue of the general Donoho and Stark uncertainty principles in time-frequency analysis. Using the spherical and spectral truncation operators, we derive the L <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>1</sub> -norm and L <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sub> -norm uncertainty principles which respectively relate the signal concentration in spatial and spectral domains as absolute value and the energy of a signal. We also analyze the sharpness of the bound imposed by the derived L <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sub> -norm uncertainty principle. The proposed uncertainty measures can be applied to signal processing problems on the sphere." @default.
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- W2138659128 date "2012-03-01" @default.
- W2138659128 modified "2023-09-24" @default.
- W2138659128 title "Concentration uncertainty principles for signals on the unit sphere" @default.
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- W2138659128 doi "https://doi.org/10.1109/icassp.2012.6288724" @default.
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