Title :
A comparative study of linear and nonlinear time-frequency filters
Author :
Kozek, Werner ; Hlawatsch, Franz
Author_Institution :
INTHFT, Tech. Univ. Wien, Austria
Abstract :
Various methods for time-varying filtering with prescribed time-frequency (TF) pass region are compared analytically and numerically. The Weyl correspondence permits a unified TF analysis of apparently unrelated concepts of linear TF filtering, including STFT-based filters, Weyl filters, and TF projection filters. The linear TF filters are compared to nonlinear TF analysis/masking/synthesis methods based on the Wigner distribution (WD) or the smoothed WD. The study of TF (signal separation problems permits the objective evaluation of TF filter methods. Linear methods yield improved performance and had reduced cost as compared to nonlinear methods
Keywords :
filtering and prediction theory; time-frequency analysis; STFT-based filters; Weyl correspondence; Weyl filters; Wigner distribution; comparative study; cost; masking; nonlinear time-frequency filters; performance; projection filters; short time Fourier transform; signal separation; synthesis; time frequency pass region; time-varying filtering; unified TF analysis; Band pass filters; Costs; Filtering; Nonlinear filters; Signal analysis; Signal processing; Signal synthesis; Source separation; Time frequency analysis; Transfer functions;
Conference_Titel :
Time-Frequency and Time-Scale Analysis, 1992., Proceedings of the IEEE-SP International Symposium
Conference_Location :
Victoria, BC
Print_ISBN :
0-7803-0805-0
DOI :
10.1109/TFTSA.1992.274211
