1 code implementation • 28 Dec 2023 • Alberto Natali, Geert Leus
In this paper, we present a novel convolution theorem which encompasses the well known convolution theorem in (graph) signal processing as well as the one related to time-varying filters.
no code implementations • 27 Oct 2022 • Jelmer van der Hoeven, Alberto Natali, Geert Leus
Forecasting time series on graphs is a fundamental problem in graph signal processing.
no code implementations • 21 Oct 2022 • Alberto Natali, Geert Leus
Fitting a polynomial to observed data is an ubiquitous task in many signal processing and machine learning tasks, such as interpolation and prediction.
no code implementations • 21 Oct 2021 • Alberto Natali, Elvin Isufi, Mario Coutino, Geert Leus
This work proposes an algorithmic framework to learn time-varying graphs from online data.
no code implementations • 22 Oct 2020 • Alberto Natali, Mario Coutino, Elvin Isufi, Geert Leus
Signal processing and machine learning algorithms for data supported over graphs, require the knowledge of the graph topology.
no code implementations • 7 Jul 2020 • Alberto Natali, Mario Coutino, Geert Leus
Therefore, in this paper, we focus on the joint identification of coefficients and graph weights defining the graph filter that best models the observed input/output network data.
no code implementations • 17 Apr 2020 • Alberto Natali, Elvin Isufi, Geert Leus
The forecasting of multi-variate time processes through graph-based techniques has recently been addressed under the graph signal processing framework.