Untrained graph neural networks for denoising

S Rey, S Segarra, R Heckel… - IEEE Transactions on …, 2022‏ - ieeexplore.ieee.org
A fundamental problem in signal processing is to denoise a signal. While there are many
well-performing methods for denoising signals defined on regular domains, including …

Robust graph filter identification and graph denoising from signal observations

S Rey, VM Tenorio, AG Marqués - IEEE Transactions on Signal …, 2023‏ - ieeexplore.ieee.org
When facing graph signal processing tasks, it is typically assumed that the graph describing
the support of the signals is known. However, in many relevant applications the available …

Convolutional learning on directed acyclic graphs

S Rey, H Ajorlou, G Mateos - arxiv preprint arxiv:2405.03056, 2024‏ - arxiv.org
We develop a novel convolutional architecture tailored for learning from data defined over
directed acyclic graphs (DAGs). DAGs can be used to model causal relationships among …

Blind deconvolution of sparse graph signals in the presence of perturbations

VM Tenorio, S Rey, AG Marques - ICASSP 2024-2024 IEEE …, 2024‏ - ieeexplore.ieee.org
Blind deconvolution over graphs involves using (observed) output graph signals to obtain
both the inputs (sources) as well as the filter that drives (models) the graph diffusion process …

Redesigning graph filter-based GNNs to relax the homophily assumption

S Rey, M Navarro, VM Tenorio, S Segarra… - arxiv preprint arxiv …, 2024‏ - arxiv.org
Graph neural networks (GNNs) have become a workhorse approach for learning from data
defined over irregular domains, typically by implicitly assuming that the data structure is …

Exploiting the Structure of Two Graphs with Graph Neural Networks

VM Tenorio, AG Marques - arxiv preprint arxiv:2411.05119, 2024‏ - arxiv.org
Graph neural networks (GNNs) have emerged as a promising solution to deal with
unstructured data, outperforming traditional deep learning architectures. However, most of …

Robust Graph Neural Network Based on Graph Denoising

VM Tenorio, S Rey, AG Marques - 2023 57th Asilomar …, 2023‏ - ieeexplore.ieee.org
Graph Neural Networks (GNNs) have emerged as a notorious alternative to address
learning problems dealing with non-Euclidean datasets. However, although most works …

Neighborhood Graph Filters Based Graph Convolutional Neural Networks for Multi-Agent Deep Reinforcement Learning

AN Nama, LB Saad… - IECON 2023-49th …, 2023‏ - ieeexplore.ieee.org
Multi-agent deep reinforcement learning (MADRL), where a group of agents inside multi-
agent systems cooperate to achieve a common goal, has been shown useful in many …

Neighborhood Graph Neural Networks under Random Perturbations and Quantization Errors

LB Saad, AN Nama… - 2022 IEEE 23rd …, 2022‏ - ieeexplore.ieee.org
Graph convolutional neural networks (GCNNs) have emerged as a promising tool in the
deep learning community to learn complex hidden relationships of data generated from non …