Search Results for author: Jorge Querol

Found 14 papers, 0 papers with code

Interference analysis of Positioning Reference Signals in 5G NTN

no code implementations17 Jan 2024 Alejandro Gonzalez-Garrido, Jorge Querol, Henk Wymeersch, Symeon Chatzinotas

Accurate asset localization holds paramount importance across various industries, ranging from transportation management to search and rescue operations.

Management

Performance Evaluation of Neuromorphic Hardware for Onboard Satellite Communication Applications

no code implementations12 Jan 2024 Eva Lagunas, Flor Ortiz, Geoffrey Eappen, Saed Daoud, Wallace Alves Martins, Jorge Querol, Symeon Chatzinotas, Nicolas Skatchkovsky, Bipin Rajendran, Osvaldo Simeone

Spiking neural networks (SNNs) implemented on neuromorphic processors (NPs) can enhance the energy efficiency of deployments of artificial intelligence (AI) for specific workloads.

Genetic Algorithm-based Beamforming in Subarray Architectures for GEO Satellites

no code implementations2 Nov 2023 Juan Andrés Vásquez-Peralvo, Jorge Querol, Eva Lagunas, Flor Ortiz, Luis Manuel Garcés-Socarrás, Jorge Luis González-Rios, Victor Monzon Baeza, Symeon Chatzinotas

The incorporation of subarrays in Direct Radiating Arrays for satellite missions is fundamental in reducing the number of Radio Frequency chains, which correspondingly diminishes cost, power consumption, space, and mass.

Supervised Learning Based Real-Time Adaptive Beamforming On-board Multibeam Satellites

no code implementations2 Nov 2023 Flor Ortiz, Juan A. Vasquez-Peralvo, Jorge Querol, Eva Lagunas, Jorge L. Gonzalez Rios, Marcele O. K. Mendonca, Luis Garces, Victor Monzon Baeza, Symeon Chatzinotas

Satellite communications (SatCom) are crucial for global connectivity, especially in the era of emerging technologies like 6G and narrowing the digital divide.

Management

Flexible Payload Configuration for Satellites using Machine Learning

no code implementations18 Oct 2023 Marcele O. K. Mendonca, Flor G. Ortiz-Gomez, Jorge Querol, Eva Lagunas, Juan A. Vásquez Peralvo, Victor Monzon Baeza, Symeon Chatzinotas, Bjorn Ottersten

Satellite communications, essential for modern connectivity, extend access to maritime, aeronautical, and remote areas where terrestrial networks are unfeasible.

Management

ML-based PBCH symbol detection and equalization for 5G Non-Terrestrial Networks

no code implementations26 Sep 2023 Inés Larráyoz-Arrigote, Marcele O. K. Mendonca, Alejandro Gonzalez-Garrido, Jevgenij Krivochiza, Sumit Kumar, Jorge Querol, Joel Grotz, Stefano Andrenacci, Symeon Chatzinotas

This paper delves into the application of Machine Learning (ML) techniques in the realm of 5G Non-Terrestrial Networks (5G-NTN), particularly focusing on symbol detection and equalization for the Physical Broadcast Channel (PBCH).

Harnessing Supervised Learning for Adaptive Beamforming in Multibeam Satellite Systems

no code implementations25 Sep 2023 Flor Ortiz, Juan A. Vasquez-Peralvo, Jorge Querol, Eva Lagunas, Jorge L. Gonzalez Rios, Luis Garces, Victor Monzon-Baeza, Symeon Chatzinotas

In today's ever-connected world, the demand for fast and widespread connectivity is insatiable, making multibeam satellite systems an indispensable pillar of modern telecommunications infrastructure.

Signal Processing Based Antenna Pattern Characterization for MIMO Systems

no code implementations18 Aug 2023 Chandan Kumar Sheemar, Jorge Querol, Symeon Chatzinotas

Furthermore, it grants a much wider research community the ability to independently perform APC for emerging complex 6G antenna systems, without relying on anechoic chambers.

IRS Assisted MIMO Full Duplex: Rate Analysis and Beamforming Under Imperfect CSI

no code implementations16 Aug 2023 Chandan Kumar Sheemar, Sourabh Solanki, Jorge Querol, Sumit Kumar, Symeon Chatzinotas

In this manuscript, we present a novel approach to jointly optimize active and passive beamforming in a multiple-input-multiple-output (MIMO) FD system assisted by an IRS for weighted sum rate (WSR) maximization.

Robust Beamforming for IRS Aided MIMO Full Duplex Systems

no code implementations15 Aug 2023 Chandan Kumar Sheemar, Jorge Querol, Sourabh Solanki, Sumit Kumar, Symeon Chatzinotas

We also analyze the achievable WSR of an IRS-assisted FD with imperfect CSI, for which the lower and the upper bounds are derived.

Robust Design

Energy-Efficient Precoding and Feeder-Link-Beam Matching Design for Bent-Pipe SATCOM Systems

no code implementations26 Apr 2023 Vu Nguyen Ha, Juan Carlos Merlano Duncan, Eva Lagunas, Jorge Querol, Symeon Chatzinotas

This paper proposes a joint optimization framework for energy-efficient linear precoding and feeder-link-beam matching design in a multi-gateway multi-beam bent-pipe satellite communication system.

Architectures and Synchronization Techniques for Distributed Satellite Systems: A Survey

no code implementations16 Mar 2022 Liz Martinez Marrero, Juan C. Merlano Duncan, Jorge Querol, Sumit Kumar, Jevgenij Krivochiza, Shree Krishna Sharma, Symeon Chatzinotas, Adriano Camps, Bjorn Otterstern

This article also provides an extensive list of applications and examples of synchronization techniques for DSS in addition to the most significant advances in other operations closely related to synchronization, such as inter-satellite ranging and relative position.

A Remote Carrier Synchronization Technique for Coherent Distributed Remote Sensing Systems

no code implementations20 Nov 2020 Juan Merlano Duncan, Liz Martinez-Marrero, Jorge Querol, Sumit Kumar, Adriano Camps, Symeon Chatzinotas, Bjorn Ottersten

Phase, frequency, and time synchronization are crucial requirements for many applications, such as multi-static remote sensing and communication systems.

System Modelling and Design Aspects of Next Generation High Throughput Satellites

no code implementations6 Sep 2020 Shree Krishna Sharma, Jorge Querol, Nicola Maturo, Symeon Chatzinotas, Bjorn Ottersten

Future generation wireless networks are targeting the convergence of fixed, mobile and broadcasting systems with the integration of satellite and terrestrial systems towards utilizing their mutual benefits.

Vocal Bursts Intensity Prediction

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