Search Results for author: Sergio Barbarossa

Found 21 papers, 6 papers with code

Opportunistic Information-Bottleneck for Goal-oriented Feature Extraction and Communication

no code implementations14 Apr 2024 Francesco Binucci, Paolo Banelli, Paolo Di Lorenzo, Sergio Barbarossa

This approach is particularly useful every time a device needs to transmit data (or features) to a server that has to fulfil an inference task, as it provides a principled way to extract the most relevant features for the task to be executed, while looking for the best trade-off between the size of the feature vector to be transmitted, inference accuracy, and complexity.

Generative AI Meets Semantic Communication: Evolution and Revolution of Communication Tasks

no code implementations10 Jan 2024 Eleonora Grassucci, Jihong Park, Sergio Barbarossa, Seong-Lyun Kim, Jinho Choi, Danilo Comminiello

Disclosing generative models capabilities in semantic communication paves the way for a paradigm shift with respect to conventional communication systems, which has great potential to reduce the amount of data traffic and offers a revolutionary versatility to novel tasks and applications that were not even conceivable a few years ago.

Denoising

Stability of Graph Convolutional Neural Networks through the lens of small perturbation analysis

no code implementations20 Dec 2023 Lucia Testa, Claudio Battiloro, Stefania Sardellitti, Sergio Barbarossa

In this work, we study the problem of stability of Graph Convolutional Neural Networks (GCNs) under random small perturbations in the underlying graph topology, i. e. under a limited number of insertions or deletions of edges.

Learning Multi-Frequency Partial Correlation Graphs

1 code implementation27 Nov 2023 Gabriele D'Acunto, Paolo Di Lorenzo, Francesco Bonchi, Stefania Sardellitti, Sergio Barbarossa

Despite the large research effort devoted to learning dependencies between time series, the state of the art still faces a major limitation: existing methods learn partial correlations but fail to discriminate across distinct frequency bands.

Time Series

Goal-oriented Communications for the IoT: System Design and Adaptive Resource Optimization

no code implementations21 Oct 2023 Paolo Di Lorenzo, Mattia Merluzzi, Francesco Binucci, Claudio Battiloro, Paolo Banelli, Emilio Calvanese Strinati, Sergio Barbarossa

Internet of Things (IoT) applications combine sensing, wireless communication, intelligence, and actuation, enabling the interaction among heterogeneous devices that collect and process considerable amounts of data.

Federated Learning

Generalized Simplicial Attention Neural Networks

1 code implementation5 Sep 2023 Claudio Battiloro, Lucia Testa, Lorenzo Giusti, Stefania Sardellitti, Paolo Di Lorenzo, Sergio Barbarossa

The aim of this work is to introduce Generalized Simplicial Attention Neural Networks (GSANs), i. e., novel neural architectures designed to process data defined on simplicial complexes using masked self-attentional layers.

Graph Classification Imputation +1

Generative Semantic Communication: Diffusion Models Beyond Bit Recovery

1 code implementation7 Jun 2023 Eleonora Grassucci, Sergio Barbarossa, Danilo Comminiello

We prove, through an in-depth assessment of multiple scenarios, that our method outperforms existing solutions in generating high-quality images with preserved semantic information even in cases where the received content is significantly degraded.

Multi-user Goal-oriented Communications with Energy-efficient Edge Resource Management

no code implementations3 May 2023 Francesco Binucci, Paolo Banelli, Paolo Di Lorenzo, Sergio Barbarossa

A common challenge in running inference tasks from remote is to extract and transmit only the features that are most significant for the inference task.

Management

Topological Signal Processing over Weighted Simplicial Complexes

no code implementations16 Feb 2023 Claudio Battiloro, Stefania Sardellitti, Sergio Barbarossa, Paolo Di Lorenzo

Weighing the topological domain over which data can be represented and analysed is a key strategy in many signal processing and machine learning applications, enabling the extraction and exploitation of meaningful data features and their (higher order) relationships.

Topological Slepians: Maximally Localized Representations of Signals over Simplicial Complexes

1 code implementation26 Oct 2022 Claudio Battiloro, Paolo Di Lorenzo, Sergio Barbarossa

This paper introduces topological Slepians, i. e., a novel class of signals defined over topological spaces (e. g., simplicial complexes) that are maximally concentrated on the topological domain (e. g., over a set of nodes, edges, triangles, etc.)

Denoising

Cell Attention Networks

1 code implementation16 Sep 2022 Lorenzo Giusti, Claudio Battiloro, Lucia Testa, Paolo Di Lorenzo, Stefania Sardellitti, Sergio Barbarossa

In this paper, we introduce Cell Attention Networks (CANs), a neural architecture operating on data defined over the vertices of a graph, representing the graph as the 1-skeleton of a cell complex introduced to capture higher order interactions.

Graph Attention Graph Classification +1

Multiscale Causal Structure Learning

no code implementations16 Jul 2022 Gabriele D'Acunto, Paolo Di Lorenzo, Sergio Barbarossa

The inference of causal structures from observed data plays a key role in unveiling the underlying dynamics of the system.

Computational Efficiency Time Series +1

Goal-Oriented Communication for Edge Learning based on the Information Bottleneck

no code implementations25 Feb 2022 Francesco Pezone, Sergio Barbarossa, Paolo Di Lorenzo

The IB principle is used to design the encoder in order to find an optimal balance between representation complexity and relevance of the encoded data with respect to the goal.

Image Classification Stochastic Optimization

Topological Signal Processing over Generalized Cell Complexes

no code implementations22 Jan 2022 Stefania Sardellitti, Sergio Barbarossa

To overcome this limit, in this paper we extend TSP to deal with signals defined over cell complexes and we also generalize the concept of cell complexes to include hollow cells.

Image Segmentation Semantic Segmentation

Dynamic Edge Computing empowered by Reconfigurable Intelligent Surfaces

no code implementations21 Dec 2021 Paolo Di Lorenzo, Mattia Merluzzi, Emilio Calvanese Strinati, Sergio Barbarossa

In this paper, we propose a novel algorithm for energy-efficient, low-latency dynamic mobile edge computing (MEC), in the context of beyond 5G networks endowed with Reconfigurable Intelligent Surfaces (RISs).

Edge-computing Stochastic Optimization

Topological Signal Processing over Cell Complexes

no code implementations13 Dec 2021 Stefania Sardellitti, Sergio Barbarossa, Lucia Testa

The Topological Signal Processing (TSP) framework has been recently developed to analyze signals defined over simplicial complexes, i. e. topological spaces represented by finite sets of elements that are closed under inclusion of subsets [1].

6G Networks: Beyond Shannon Towards Semantic and Goal-Oriented Communications

no code implementations4 Nov 2020 Emilio Calvanese Strinati, Sergio Barbarossa

The idea is that, whenever communication occurs to convey meaning or to accomplish a goal, what really matters is the impact that the correct reception/interpretation of a packet is going to have on the goal accomplishment.

BIG-bench Machine Learning

Discontinuous Computation Offloading for Energy-Efficient Mobile Edge Computing

no code implementations8 Aug 2020 Mattia Merluzzi, Nicola di Pietro, Paolo Di Lorenzo, Emilio Calvanese Strinati, Sergio Barbarossa

We propose a novel strategy for energy-efficient dynamic computation offloading, in the context of edge-computing-aided beyond 5G networks.

Edge-computing Stochastic Optimization

Topological Signal Processing over Simplicial Complexes

1 code implementation26 Jul 2019 Sergio Barbarossa, Stefania Sardellitti

The goal of this paper is to establish the fundamental tools to analyze signals defined over a topological space, i. e. a set of points along with a set of neighborhood relations.

Adaptive Graph Signal Processing: Algorithms and Optimal Sampling Strategies

no code implementations12 Sep 2017 Paolo Di Lorenzo, Paolo Banelli, Elvin Isufi, Sergio Barbarossa, Geert Leus

Numerical simulations carried out over both synthetic and real data illustrate the good performance of the proposed sampling and reconstruction strategies for (possibly distributed) adaptive learning of signals defined over graphs.

Graph Sampling

Adaptive Least Mean Squares Estimation of Graph Signals

no code implementations18 Feb 2016 Paolo Di Lorenzo, Sergio Barbarossa, Paolo Banelli, Stefania Sardellitti

The aim of this paper is to propose a least mean squares (LMS) strategy for adaptive estimation of signals defined over graphs.

Graph Sampling

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