27 citations · 138 across the 24 of their papers we have counts for
7 papers · 1 filter
ESPRIT for multidimensional general grids
Fredrik Andersson, Marcus Carlsson
We present a new method for complex frequency estimation in several variables, extending the classical (1d) ESPRIT-algorithm. We also consider how to work with data sampled on non-…
Fast hyperbolic Radon transform represented as convolutions in log-polar coordinates
Viktor V. Nikitin, Fredrik Andersson, Marcus Carlsson +1
The hyperbolic Radon transform is a commonly used tool in seismic processing, for instance in seismic velocity analysis, data interpolation and for multiple removal. A direct imple…
Fixed-point algorithms for frequency estimation and structured low rank approximation
Fredrik Andersson, Marcus Carlsson
We develop fixed-point algorithms for the approximation of structured matrices with rank penalties. In particular we use these fixed-point algorithms for making approximations by s…
Fast algorithms and efficient GPU implementations for the Radon transform and the back-projection operator represented as convolution operators
Fredrik Andersson, Marcus Carlsson, Viktor V. Nikitin
The Radon transform and its adjoint, the back-projection operator, can both be expressed as convolutions in log-polar coordinates. Hence, fast algorithms for the application of the…
Frequency estimation based on Hankel matrices and the alternating direction method of multipliers
Fredrik Andersson, Marcus Carlsson, Jean-Yves Tourneret +1
We develop a parametric high-resolution method for the estimation of the frequency nodes of linear combinations of complex exponentials with exponential damping. We use Kronecker's…
Alternating projections on non-tangential manifolds
Fredrik Andersson, Marcus Carlsson
We consider sequences of points obtained by projecting back and forth between two manifolds $\M_1$ and $\M_2$, and give conditions guaranteeing that the sequen…
A fast alternating projection method for complex frequency estimation
Fredrik Andersson, Marcus Carlsson, Per-Anders Ivert
The problem of approximating a sampled function using sums of a fixed number of complex exponentials is considered. We use alternating projections between fixed rank matrices and H…