Covariant time-frequency representations through unitary equivalence

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


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 languageEnglish (US)
Pages (from-to)79-81
Number of pages3
JournalIEEE Signal Processing Letters
Issue number3
StatePublished - Mar 1996

ASJC Scopus subject areas

  • Signal Processing
  • Electrical and Electronic Engineering
  • Applied Mathematics


Dive into the research topics of 'Covariant time-frequency representations through unitary equivalence'. Together they form a unique fingerprint.

Cite this