507 citations
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Showing 2007 · math.CAShow all
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math.CA2007★ 5 cited
Sparsity in time-frequency representations
Goetz E. Pfander, Holger Rauhut
We consider signals and operators in finite dimension which have sparse time-frequency representations. As main result we show that an -sparse Gabor representation in $\mathbb{C…
math.CA2007
On the invertibility of "rectangular" bi-infinite matrices and applications in time--frequency analysis
Goetz E. Pfander
Finite dimensional matrices having more columns than rows have no left inverses while those having more rows than columns have no right inverses. We give generalizations of these s…