Classes of smoothed Weyl symbols
Date of Original Version
We propose a new class of time frequency (TF) symbols covariant to time shifts and frequency shifts on a random process. The new TF symbols are useful for analyzing linear time-varying systems or nonstationary random processes, and they are defined as TF-smoothed versions of the narrowband Weyl symbol. We derive kernel constraints for the new TF symbols to satisfy the unitarity property and the quadratic form. We also propose a new class of TF symbols covariant to time shifts and scale changes on a random process. These new TF symbols can be interpreted as affine-smoothed versions of the narrowband Weyl symbol or of the wideband Po-Weyl symbol.
IEEE Signal Processing Letters
Iem, Byeong G., Antonia Papandreou-Suppappola, and G. F. Boudreaux-Bartels. "Classes of smoothed Weyl symbols." IEEE Signal Processing Letters 7, 7 (2000): 186-188. doi:10.1109/97.847364.