Search Results for author: Elisabeth de Carvalho

Found 17 papers, 4 papers with code

Electromagnetic Based Communication Model for Dynamic Metasurface Antennas

1 code implementation22 Dec 2022 Robin Jess Williams, Pablo Ramirez-Espinosa, Jide Yuan, Elisabeth de Carvalho

Dynamic metasurface antennas (DMAs) arise as a promising technology in the field of massive multiple-input multiple-output (mMIMO) systems, offering the possibility of integrating a large number of antennas in a limited -- and potentially large -- aperture while keeping the required number of radio-frequency (RF) chains under control.

Performance Evaluation of Dynamic Metasurface Antennas: Impact of Insertion Losses and Coupling

no code implementations27 Jun 2022 Pablo Ramírez-Espinosa, Robin Jess Williams, Jide Yuan, Elisabeth de Carvalho

This paper evaluates the performance of multi-user massive multiple-input multiple-output (MIMO) systems in which the base station is equipped with a dynamic metasurface antenna (DMA).

valid

Floor Map Reconstruction Through Radio Sensing and Learning By a Large Intelligent Surface

no code implementations21 Jun 2022 Cristian J. Vaca-Rubio, Roberto Pereira, Xavier Mestre, David Gregoratti, Zheng-Hua Tan, Elisabeth de Carvalho, Petar Popovski

Environmental scene reconstruction is of great interest for autonomous robotic applications, since an accurate representation of the environment is necessary to ensure safe interaction with robots.

User Clustering for Rate Splitting using Machine Learning

no code implementations23 May 2022 Roberto Pereira, Anay Ajit Deshpande, Cristian J. Vaca-Rubio, Xavier Mestre, Andrea Zanella, David Gregoratti, Elisabeth de Carvalho, Petar Popovski

Hierarchical Rate Splitting (HRS) schemes proposed in recent years have shown to provide significant improvements in exploiting spatial diversity in wireless networks and provide high throughput for all users while minimising interference among them.

BIG-bench Machine Learning Clustering

User Localization using RF Sensing: A Performance comparison between LIS and mmWave Radars

no code implementations17 May 2022 Cristian J. Vaca-Rubio, Dariush Salami, Petar Popovski, Elisabeth de Carvalho, Zheng-Hua Tan, Stephan Sigg

Since electromagnetic signals are omnipresent, Radio Frequency (RF)-sensing has the potential to become a universal sensing mechanism with applications in localization, smart-home, retail, gesture recognition, intrusion detection, etc.

Gesture Recognition Intrusion Detection

Location- and Orientation-aware Millimeter Wave Beam Selection for Multi-Panel Antenna Devices

no code implementations22 Mar 2022 Sajad Rezaie, João Morais, Elisabeth de Carvalho, Ahmed Alkhateeb, Carles Navarro Manchón

While initial beam alignment (BA) in millimeter-wave networks has been thoroughly investigated, most research assumes a simplified terminal model based on uniform linear/planar arrays with isotropic antennas.

Radio Sensing with Large Intelligent Surface for 6G

no code implementations4 Nov 2021 Cristian J. Vaca-Rubio, Pablo Ramirez-Espinosa, Kimmo Kansanen, Zheng-Hua Tan, Elisabeth de Carvalho

This paper leverages the potential of Large Intelligent Surface (LIS) for radio sensing in 6G wireless networks.

Template Matching

A Deep Learning Approach to Location- and Orientation-aided 3D Beam Selection for mmWave Communications

no code implementations13 Oct 2021 Sajad Rezaie, Elisabeth de Carvalho, Carles Navarro Manchón

This paper proposes a location- and orientation-based beam selection method to enable context information (CI)-based beam alignment in applications where the UT can take arbitrary orientation at each location.

Position

Energy-Efficient Design for RIS-assisted UAVcommunications in beyond-5G Networks

no code implementations24 Sep 2021 Anay Ajit Deshpande, Cristian J. Vaca-Rubio, Salman Mohebi, Dariush Salami, Elisabeth de Carvalho, Petar Popovski, Stephan Sigg, Michele Zorzi, Andrea Zanella

The usage of Reconfigurable Intelligent Surfaces (RIS) in conjunction with Unmanned Ariel Vehicles (UAVs) is being investigated as a way to provide energy-efficient communication to ground users in dense urban areas.

Uncoordinated and Decentralized Processing in Extra-Large MIMO Arrays

no code implementations11 Mar 2021 Abolfazl Amiri, Carles Navarro Manch'on, Elisabeth de Carvalho

We propose a decentralized receiver for extra-large multiple-input multiple-output (XL-MIMO) arrays.

Reconfigurable Intelligent Surfaces: A Signal Processing Perspective With Wireless Applications

2 code implementations1 Feb 2021 Emil Björnson, Henk Wymeersch, Bho Matthiesen, Petar Popovski, Luca Sanguinetti, Elisabeth de Carvalho

We will provide the formulas and derivations that are required to understand and analyze RIS-aided systems using signal processing, and exemplify how they can be utilized for improved communication, localization, and sensing.

Assessing Wireless Sensing Potential with Large Intelligent Surfaces

no code implementations16 Nov 2020 Cristian J. Vaca-Rubio, Pablo Ramirez-Espinosa, Kimmo Kansanen, Zheng-Hua Tan, Elisabeth de Carvalho, Petar Popovski

By treating an LIS as a radio image of the environment relying on the received signal power, we develop techniques to sense the environment, by leveraging the tools of image processing and machine learning.

BIG-bench Machine Learning Denoising +1

Antenna Selection for Improving Energy Efficiency in XL-MIMO Systems

no code implementations5 Sep 2020 José Carlos Marinello, Taufik Abrão, Abolfazl Amiri, Elisabeth de Carvalho, Petar Popovski

We consider the recently proposed extra-large scale massive multiple-input multiple-output (XL-MIMO) systems, with some hundreds of antennas serving a smaller number of users.

Total Energy

Distributed Receivers for Extra-Large Scale MIMO Arrays: A Message Passing Approach

no code implementations14 Jul 2020 Abolfazl Amiri, Sajad Rezaie, Carles Navarro Manchon, Elisabeth de Carvalho

In this paper, we propose a distributed receiver for such an XL-MIMO system that can address both challenges.

Low-Complexity Distributed XL-MIMO for Multiuser Detection

1 code implementation31 Jan 2020 Victor Croisfelt Rodrigues, Abolfazl Amiri, Taufik Abrão, Elisabeth de Carvalho, Petar Popovski

In this paper, the zero-forcing and regularized zero-forcing schemes operating in crowded extra-large MIMO (XL-MIMO) scenarios with a fixed number of subarrays have been emulated using the randomized Kaczmarz algorithm (rKA).

A Random Access Protocol for Pilot Allocation in Crowded Massive MIMO Systems

1 code implementation14 Apr 2016 Emil Björnson, Elisabeth de Carvalho, Jesper H. Sørensen, Erik G. Larsson, Petar Popovski

The Massive MIMO (multiple-input multiple-output) technology has great potential to manage the rapid growth of wireless data traffic.

Information Theory Networking and Internet Architecture Information Theory

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