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Nonlinear Wigner-Ville Spectrum Estimation using Wavelet Soft Thresholding

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Title: Nonlinear Wigner-Ville Spectrum Estimation using Wavelet Soft Thresholding
Author: Baraniuk, Richard G.
Type: Conference Paper
Keywords: Wigner-Ville distribution; wavelet transform; wavelet soft-thresholding
Citation: R. G. Baraniuk,"Nonlinear Wigner-Ville Spectrum Estimation using Wavelet Soft Thresholding," in SPIE Technical Conference on Wavelet Applications for Dual-Use,
Abstract: The large variance of the Wigner-Ville distribution makes smoothing essential for producing readable estimates of the time-varying power spectrum of noise corrupted signals. Since linear smoothing trades reduced variance for increased bias of the signal components, we explore two nonlinear estimation techniques based on soft-thresholding in an orthonormal basis representation. Soft-thresholding provides considerable variance reduction without greatly impairing the time-frequency resolution of the estimated spectrum.
Date Published: 1995-04-01

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  • ECE Publications [1043 items]
    Publications by Rice University Electrical and Computer Engineering faculty and graduate students
  • DSP Publications [508 items]
    Publications by Rice Faculty and graduate students in digital signal processing.