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- W2118561655 abstract "The ambiguity function and the Wigner distribution are fundamental tools in the time-frequency analysis. In this paper, we present an analog of the ambiguity function and the Wigner distribution for signals on the sphere. First, we formulate the ambiguity function for signals on the sphere which represents the signals in joint spatio-spectral domain and derive an inversion operation to obtain the signal from its ambiguity function. Next, we formulate the Wigner distribution for azimuthally symmetric signals on the sphere as a two dimensional spherical harmonics transform of the ambiguity function. We provide the matrix formulation of the Wigner distribution and discuss some of its useful properties. Finally, we illustrate the use of Wigner distribution for spatial and/or spectral localization of a signal in joint spatio-spectral domain. The obtained results provide the first step in designing more sophisticated transforms on the sphere." @default.
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- W2118561655 date "2012-03-01" @default.
- W2118561655 modified "2023-09-27" @default.
- W2118561655 title "Ambiguity function and Wigner distribution on the sphere" @default.
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- W2118561655 doi "https://doi.org/10.1109/icassp.2012.6288647" @default.
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