Title :
Artifact reduction in the Wigner distribution
Author :
Rao, Preeti ; Taylor, Fred J.
Author_Institution :
Dept. of Electr. Eng., Florida Univ., Gainesville, FL, USA
Abstract :
The Wigner distribution (WD) of multicomponent signals and signals contaminated by additive noise is degraded severely by cross-terms or artifacts that arise due to the bilinear nature of the WD. An artifact reduction method is presented. It is shown through simulation results which compare the standard discrete-WD with the modified discrete-WD that it is usually possible to achieve significant noise reduction using the proposed simple and robust technique, while still maintaining high time-frequency resolution characteristic of the WD
Keywords :
random noise; signal processing; time-varying systems; Wigner distribution; additive noise; artifact reduction method; artifacts; bilinear nature; cross-terms; modified discrete-WD; multicomponent signals; noise reduction; standard discrete-WD; time-frequency resolution characteristic; time-varying systems; Additive noise; Degradation; Frequency estimation; Noise reduction; Signal analysis; Signal processing; Signal resolution; Spectrogram; Speech analysis; Time frequency analysis;
Conference_Titel :
Circuits and Systems, 1989., Proceedings of the 32nd Midwest Symposium on
Conference_Location :
Champaign, IL
DOI :
10.1109/MWSCAS.1989.101988
