Abstract
We propose a straightforward characterization of all quadratic time-frequency representations covariant to an important class of unitary signal transforms (namely, those having two continuous-valued parameters and an underlying group structure). Thanks to a fundamental theorem from the theory of Lie groups, we can describe these representations simply in terms of unitary transformations of the well-known Cohen's and affine classes.
Original language | English (US) |
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Pages (from-to) | 79-81 |
Number of pages | 3 |
Journal | IEEE Signal Processing Letters |
Volume | 3 |
Issue number | 3 |
DOIs | |
State | Published - Mar 1996 |
ASJC Scopus subject areas
- Signal Processing
- Electrical and Electronic Engineering
- Applied Mathematics