Modulation-based time-variant filter design using Wigner distribution
Journal
Signal Processing
Journal Issue
40
44595
Pages
335-340
Date Issued
1994
Date
1994
Author(s)
Yeh, Min-Hung
Abstract
The modulation-based time-variant filters are very useful for nonstationary signal processing. They can be constructed by three stages: pre-modulation, time-invariant low-pass filtering and post-modulation. Wigner distribution is a popular tool for showing the time-frequency distribution of nonstationary signals. The combination of these two techniques is presented in this paper. We introduce Wigner distribution as a tool to estimate the modulation function for modulation-based filter. The Wigner distributions of modulation-based filters are discussed and the Wigner distributions of output signals of modulation-based filters are also shown. © 1994.
Subjects
Time-variant filter; Wigner distribution
Other Subjects
Estimation; Function evaluation; Modulation; Signal processing; Time varying systems; Modulation based time variant filters; Nonstationary signals; Stationary signal processing; Wigner distribution; Low pass filters
Type
journal article
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