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Methods for Attenuation of the Cross-Modulation Effects in the Wigner–Ville Distribution

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Abstract

We consider the characteristics of typical nonlinear distortions in the dynamical spectra of signals, obtained using the Wigner–Ville method, and discuss the existing techniques for attenuating these distortions. Certain methods are proposed to “clean” Wigner–Ville distributions of products of the nonlinear interaction between the signal component under study and its more powerful harmonic or pulsed components. The proposed techniques are mainly based on a preliminary linear processing (e.g., using the fast Fourier transform) and/or frequency filtering of the signal. A software package for calculating the Wigner–Ville distribution on a PC is developed. Using this package, we approved successfully the proposed algorithms for test and actual signals.

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Authors and Affiliations

  1. N. I. Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod, Russia

    E. I. Shkelev, A. G. Kislyakov & S. Yu. Lupov

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  1. E. I. Shkelev
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  2. A. G. Kislyakov
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  3. S. Yu. Lupov
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Shkelev, E.I., Kislyakov, A.G. & Lupov, S.Y. Methods for Attenuation of the Cross-Modulation Effects in the Wigner–Ville Distribution. Radiophysics and Quantum Electronics 45, 396–404 (2002). https://doi.org/10.1023/A:1019715812206

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