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Mostrando ítems 121-130 de 222
Intelligent Reflective Surfaces for Wireless Networks: An Overview of Applications, Approached Issues, and Open Problems
(MDPI, 2021)
[Abstract] An intelligent reflective surface (IRS) is a novel and revolutionizing communication technology destined to enable the control of the radio environment. An IRS is a real-time controllable reflectarray with a ...
Coded Aperture Hyperspectral Image Reconstruction
(MDPI, 2021)
[Abstract] In this work, we study and analyze the reconstruction of hyperspectral images that are sampled with a CASSI device. The sensing procedure was modeled with the help of the CS theory, which enabled efficient ...
COVID-19 Digital Vaccination Passport Based on Blockchain with Its Own Cryptocurrency as a Reward and Mobile App for Its Use
(MDPI, 2021)
[Abstract] Due to the recent outbreak of the COVID-19 pandemic, everybody’s lives have changed dramatically and society went through new stages accompanied by new needs. This article details a solution for one of these ...
E-Voting System Using Hyperledger Fabric Blockchain and Smart Contracts †
(MDPI, 2021)
[Abstract] The emergence of the current pandemic has led to a new reality in which bureaucratic formalities have been affected in terms of health security, procedures, resource management, among others. Specifically, in ...
JSCC-Cast: A Joint Source Channel Coding Video Encoding and Transmission System with Limited Digital Metadata
(MDPI, 2021)
[Abstract] This work considers the design and practical implementation of JSCC-Cast, a comprehensive analog video encoding and transmission system requiring a reduced amount of digital metadata. Suitable applications for ...
Alternatives for Locating People Using Cameras and Embedded AI Accelerators: A Practical Approach
(MDPI, 2021)
[Abstract] Indoor positioning systems usually rely on RF-based devices that should be carried by the targets, which is non-viable in certain use cases. Recent advances in AI have increased the reliability of person detection ...
PreLectO: An App for Cognitive Stimulation through Games in Early Childhood
(MDPI, 2021)
[Abstract] The goal of this work was to develop a mobile application for Android devices, with the objective of stimulating the cognitive skills of children from 0 to 6 years old who are suffering from learning disabilities, ...
A Deep Learning-Based Strategy to Predict Self-Interference in SFN DTT
(MDPI, 2021)
[Abstract] A deep learning-based strategy for the analysis of the self-interference in single frequency networks (SFNs) for digital terrestrial television (DTT) broadcasting is considered. Several laboratory measurements ...
Wideband Hybrid Precoding Using Time Modulated Arrays
(Institute of Electrical and Electronics Engineers, 2020-08-05)
[Abstract]
Hybrid digital-analog precoding is a cost effective solution for transmitting over the large bandwidths and huge antenna arrays available in the millimeter wave frequency bands. In this work we focus on the ...
User Grouping for the Uplink of Multiuser Hybrid mmWave MIMO
(Institute of Electrical and Electronics Engineers, 2020-03-16)
[Abstract] Hybrid analog/digital schemes for precoding/combining have proved to be a low-complexity and/or low-power strategy to obtain reasonable beamforming gains in multiuser millimeter-wave (mmWave) multiple-input ...