Title :
Time-frequency localization via the Weyl correspondence
Author :
Ramanathan, Jayakumar ; Topiwala, Pankaj
Author_Institution :
MITRE Corp., Bedford, MA, USA
Abstract :
A technique for producing signals whose energy is concentrated in a given region of the time-frequency plane is examined. The degree to which a particular signal is concentrated is measured by integrating its time-frequency distribution over the given region. This technique, using the Wigner distribution, has recently been used as a framework for time-varying filtering. The associated subspace projection operator is studied. Estimates for the eigenvalue decay and the smoothness and decay of the eigenfunctions are presented
Keywords :
eigenvalues and eigenfunctions; filtering and prediction theory; frequency-domain analysis; signal processing; time-domain analysis; Weyl correspondence; Wigner distribution; eigenfunction decay; eigenvalue decay; signal energy concentration; subspace projection operator; time-frequency plane; time-varying filtering; Books; Eigenvalues and eigenfunctions; Energy measurement; Filtering; Particle measurements; Time frequency analysis; Uncertainty;
Conference_Titel :
Signals, Systems and Computers, 1991. 1991 Conference Record of the Twenty-Fifth Asilomar Conference on
Conference_Location :
Pacific Grove, CA
Print_ISBN :
0-8186-2470-1
DOI :
10.1109/ACSSC.1991.186472
