71 citations · 360 across the 31 of their papers we have counts for
4 papers · 1 filter
Quasi-Linear Compressed Sensing
Martin Ehler, Massimo Fornasier, Juliane Sigl
Inspired by significant real-life applications, in particular, sparse phase retrieval and sparse pulsation frequency detection in Asteroseismology, we investigate a general framewo…
Metric entropy, n-widths, and sampling of functions on manifolds
Martin Ehler, Frank Filbir
We first investigate on the asymptotics of the Kolmogorov metric entropy and nonlinear n-widths of approximation spaces on some function classes on manifolds and quasi-metric measu…
Tight and random nonorthogonal fusion frames
Jameson Cahill, Peter G. Casazza, Martin Ehler +1
First we show that tight nonorthogonal fusion frames a relatively easy to com by. In order to do this we need to establish a classification of how to to wire a self adjoint operato…
Preconditioning filter bank decompositions using structured normalized tight frames
Martin Ehler
We turn a given filter bank into a filtering scheme that provides perfect reconstruction, synthesis is the adjoint of the analysis part (so-called unitary filter banks), all filter…