Alberto Tarable
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Information Retrieval in the Age of Generative AI: The RGB Model Open
The advent of Large Language Models (LLMs) and generative AI is fundamentally transforming information retrieval and processing on the Internet, bringing both great potential and significant concerns regarding content authenticity and reli…
Generalized Quantum-Assisted Digital Signature Open
This article introduces generalized quantum-assisted digital signature (GQaDS), an improved version of a recently proposed scheme whose information-theoretic security is inherited by adopting quantum key distribution keys for digital signa…
Generalized quantum-assisted digital signature service in an SDN-controlled quantum-integrated optical network Open
Digital signature (DS) is an essential application of cryptography, used to certify the provenance of a message and its authenticity, guaranteeing the non-repudiation, unforgeability, and transferability of messages. However, the forthcomi…
Generalized Quantum-assisted Digital Signature Open
This paper introduces Generalized Quantum-assisted Digital Signature (GQaDS), an improved version of a recently proposed scheme whose information theoretic security is inherited by adopting QKD keys for digital signature purposes. Its secu…
Uplink soft handover for LEO constellations: how strong the inter-satellite link should be Open
We consider a constellation of low-earth-orbit (LEO) satellites connected to a handheld device on the ground. Due to the very large orbital speed, an effective handover strategy becomes of paramount importance. In particular, we study the …
IRS Configuration Techniques for Ultra Wideband Signals and THz Communications Open
Motivated by the challenges of future 6G communications where terahertz (THz) frequencies, intelligent reflective surfaces (IRSs) and ultra-wideband (UWB) signals coexist, we analyse and propose a set of efficient techniques for configurin…
Rateless Protograph LDPC Codes for Quantum Key Distribution Open
Information reconciliation (IR) is a key step in quantum key distribution (QKD). In recent years, blind reconciliation based on low-density parity-check (LDPC) codes has replaced Cascade as a standard de facto since it guarantees efficient…
Ranking a Set of Objects using Heterogeneous Workers: QUITE an Easy Problem Open
We focus on the problem of ranking $N$ objects starting from a set of noisy pairwise comparisons provided by a crowd of unequal workers, each worker being characterized by a specific degree of reliability, which reflects her ability to ran…
EM-Based Estimation and Compensation of Phase Noise in Massive-MIMO Uplink Communications Open
Phase noise (PN) is a major disturbance in MIMO systems, where the contribution of different oscillators at the transmitter and the receiver side may degrade the overall performance and offset the gains offered by MIMO techniques. This is …
EM-Based Estimation and Compensation of Phase Noise in Massive-MIMO Uplink Communications Open
Phase noise (PN) is a major disturbance in MIMO systems, where the contribution of different oscillators at the transmitter and the receiver side may degrade the overall performance and offset the gains offered by MIMO techniques. This is …
DuctiLoc: Energy-Efficient Location Sampling With Configurable Accuracy Open
Mobile device tracking technologies based on various positioning systems have made location data collection ubiquitous. The frequency at which location samples are recorded varies across applications, yet it is usually pre-defined and fixe…
Compensation of Phase Noise in Massive-MIMO Uplink Communications Based on Expectation-Maximization Algorithm Open
Phase noise (PN) is a major disturbance in MIMO systems, where the contribution of different oscillators at the transmitter and the receiver side may degrade the overall performance and offset the gains offered by MIMO techniques. This is …
View article: Optimization of IRS-aided Sub-THz Communications under practical design constraints
Optimization of IRS-aided Sub-THz Communications under practical design constraints Open
We consider the optimization of a smart radio environment where meta-surfaces are employed to improve the performance of multiuser wireless networks working at sub-THz frequencies. Motivated by the extreme sparsity of the THz channel we pr…
View article: When Meta-Surfaces Meet Users: Optimization of Smart Radio Environments in 6G Sub-THz Communications.
When Meta-Surfaces Meet Users: Optimization of Smart Radio Environments in 6G Sub-THz Communications. Open
We consider a smart radio environment where meta-surfaces are employed to improve the performance of wireless networks working at sub-THz frequencies. To this end, we propose a comprehensive mathematical channel model, taking into account …
Two is Better than One: Reducing the Loss of the Window Decoder for SC-LDPC Codes Open
In this paper, we consider spatially coupled LDPC codes derived from protographs. In particular, we analyze the performance of the window decoder (WD), which allows reducing the complexity, the memory requirements, and the latency of the f…
Asynchronous semi-anonymous dynamics over large-scale networks Open
We analyze a class of stochastic processes, referred to as asynchronous and semi-anonymous dynamics (ASD), over directed labeled random networks. These processes are a natural tool to describe general best-response and noisy best-response …
Ranking a Set of Objects: A Graph Based Least-Square Approach Open
We consider the problem of ranking $N$ objects starting from a set of noisy pairwise comparisons provided by a crowd of equal workers. We assume that objects are endowed with intrinsic qualities and that the probability with which an objec…
Opinion Dynamics on Correlated Subjects in Social Networks Open
Understanding the evolution of collective beliefs is of critical importance to get insights on the political trends as well as on social tastes and opinions. In particular, it is pivotal to develop analytical models that can predict the be…
Chaos-Based Anytime-Reliable Coded Communications Open
Anytime reliable communication systems are needed in contexts where the\nproperty of vanishing error probability with time is critical. This is the case\nof unstable real time systems that are to be controlled through the\ntransmission and…
Link-Layer Coding for GNSS Navigation Messages Open
In this paper, we face the problem of ensuring reliability of Global Navigation Satellite Systems (GNSSs) in harsh channel conditions, where obstacles and scatter cause long outage events that cannot be counteracted with channel coding onl…
Selecting the Top-Quality Item Through Crowd Scoring Open
We investigate crowdsourcing algorithms for finding the top-quality item within a large collection of objects with unknown intrinsic quality values. This is an important problem with many relevant applications, such as in networked recomme…
On the Sampling Frequency of Human Mobility Open
Recent studies have leveraged tracking techniques based on positioning technologiesto discover new knowledge about human mobility. These investigations have revealed, amongothers, a high spatiotemporal regularity of individual movement pat…
$k^{τ,ε}$-anonymity: Towards Privacy-Preserving Publishing of Spatiotemporal Trajectory Data Open
Mobile network operators can track subscribers via passive or active monitoring of device locations. The recorded trajectories offer an unprecedented outlook on the activities of large user populations, which enables developing new network…
The Importance of Worker Reputation Information in Microtask-Based Crowd Work Systems Open
This paper presents the first systematic investigation of the potential performance gains for crowd work systems, deriving from available information at the requester about individual worker reputation. In particular, we first formalize th…