6 papers
Quantization Analysis and Robust Design for Distributed Graph Filters
Leila Ben Saad, Baltasar Beferull-Lozano, Elvin Isufi
Distributed graph filters have found applications in wireless sensor networks (WSNs) to solve distributed tasks such as consensus, signal denoising, and reconstruction. However, wh…
Online Hyperparameter Search Interleaved with Proximal Parameter Updates
Luis Miguel Lopez-Ramos, Baltasar Beferull-Lozano
There is a clear need for efficient algorithms to tune hyperparameters for statistical learning schemes, since the commonly applied search methods (such as grid search with N-fold…
Accurate Graph Filtering in Wireless Sensor Networks
Leila Ben Saad, Baltasar Beferull-Lozano
Wireless sensor networks (WSNs) are considered as a major technology enabling the Internet of Things (IoT) paradigm. The recent emerging Graph Signal Processing field can also cont…
Dynamic Regret Analysis for Online Tracking of Time-varying Structural Equation Model Topologies
Bakht Zaman, Luis Miguel Lopez Ramos, Baltasar Beferull-Lozano
Identifying dependencies among variables in a complex system is an important problem in network science. Structural equation models (SEM) have been used widely in many fields for t…
Fast Decentralized Linear Functions via Successive Graph Shift Operators
Siavash Mollaebrahim, Daniel Romero, Baltasar Beferull-Lozano
We study decentralized designing of the graph shift operators to implement linear transformations between graph signals. Since this operator captures the local structure of the gra…
Location-free Spectrum Cartography
Yves Teganya, Daniel Romero, Luis Miguel Lopez Ramos +1
Spectrum cartography constructs maps of metrics such as channel gain or received signal power across a geographic area of interest using spatially distributed sensor measurements.…