Title :
Separation of transient signals
Author :
Weisburn, B.A. ; Parks, T.W. ; Shenoy, R.G.
Author_Institution :
Cornell Univ., Ithaca, NY, USA
Abstract :
Presents a method for recovering transient signal components which may not be separable either in time or in frequency, but which are linearly separable in the time-frequency plane. A linear operator is formed which selects components lying in a strip situated at an arbitrary angle in time-frequency. Whereas other methods approximate time-varying filters corresponding to different masks in time-frequency, the present method is restricted to strips, but there is no approximation involved. This strip filter is implemented in two ways, using Hermite functions and by chirp modulation, and is tested on a synthetic data signal
Keywords :
chirp modulation; filtering theory; frequency-domain analysis; signal reconstruction; time-domain analysis; time-frequency analysis; time-varying filters; transient analysis; Hermite functions; chirp modulation; linear operator; separation; strip filter; synthetic data signal; time-frequency plane; transient signals; Band pass filters; Chirp modulation; Eigenvalues and eigenfunctions; Filtering; Fourier transforms; Nonlinear filters; Shape; Strips; Testing; Time frequency analysis;
Conference_Titel :
Digital Signal Processing Workshop, 1994., 1994 Sixth IEEE
Conference_Location :
Yosemite National Park, CA
Print_ISBN :
0-7803-1948-6
DOI :
10.1109/DSP.1994.379841
