Search results for "Visible light communication"

showing 5 items of 5 documents

Target 5G visible light positioning signal subcarrier extraction method using particle swarm optimization algorithm

2021

International audience; With the explosive growth of demand for Internet of Things (IoT) applications and the increasing dependence of users on wireless connections, indoor location based service(LBS) under 5G-Public-Private Partnership (5G-PPP) using cases have received more attention and get rapid development. Thanks to the safty, security and customization of 5G network pointed by 5G forum white paper, indoor positioning systems using unified 5G New Radio (NR) signals have become the focus of the next generation of visible light positioning (VLP) systems. In 5G New Radio(NR) frame, totally 192 subcarriers are used to carry positioning reference signal(PRS). In order to improve the positi…

[SPI.OPTI] Engineering Sciences [physics]/Optics / PhotonicComputer science[INFO.INFO-SE] Computer Science [cs]/Software Engineering [cs.SE]Visible Light Positioning(VLP)02 engineering and technology[INFO.INFO-SE]Computer Science [cs]/Software Engineering [cs.SE]SignalSubcarrier0203 mechanical engineering0202 electrical engineering electronic engineering information engineeringWireless[INFO.INFO-RB]Computer Science [cs]/Robotics [cs.RO][SPI.SIGNAL] Engineering Sciences [physics]/Signal and Image processingVisible Light Communication(VLC)business.industryparticle swarm optimization(PSO)[INFO.INFO-RB] Computer Science [cs]/Robotics [cs.RO]020208 electrical & electronic engineeringFrame (networking)Particle swarm optimization020302 automobile design & engineeringReceived Signal Strength Indication(RSSI)[SPI.TRON] Engineering Sciences [physics]/Electronics[SPI.TRON]Engineering Sciences [physics]/ElectronicsLocalizationLocation-based service[SPI.OPTI]Engineering Sciences [physics]/Optics / PhotonicFocus (optics)businessAlgorithm[SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing5G5G
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Optical wireless communication systems

2017

Abstract The emerging field of optical wireless communication (OWC) systems is seen as potential complementary technology to the radio frequency wireless communications in certain applications. It is deemed as a possible technology in the future 5th Generation communication networks to address the spectrum congestion and improve the system’s capacity. More research and developments in OWC is still needed in order for it to be adopted in current and future communication systems. This special issue brings together research papers on OWC covering free space optic, visible communications and ultraviolet communications.

Wi-Fi arrayComputer scienceEspectre ultraviolatVisible light communication02 engineering and technologyCommunications system01 natural sciences010309 optics0103 physical sciences0202 electrical engineering electronic engineering information engineeringWirelessElectrical and Electronic EngineeringWired communicationFixed wirelessComunicació i tecnologiaComputingMilieux_MISCELLANEOUSWireless networkbusiness.industry020206 networking & telecommunicationsWireless WANBase transceiver stationOptical performance monitoringTelecommunications networkAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic MaterialsKey distribution in wireless sensor networksOptical wireless[SPI.OPTI]Engineering Sciences [physics]/Optics / PhotonicbusinessTelecommunications[SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processingFree-space optical communication
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Investigation of data encryption impact on broadcasting visible light communications

2014

Este trabajo investiga el impacto de la encriptación y desencriptación de datos en un sistema de comunicaciones de luz visible (VLC) de difusión en interiores incrustado en la capa física. Se ha implementado el cifrado RSA para proporcionar una transmisión de datos segura en la capa física. El artículo muestra el rendimiento de la tasa de error de bits (BER) para los sistemas VLC seguros y no seguros (8 y 12 bits) para velocidades de datos de 2 y 12 Mbps. Para una BER de 10e-4 mostramos que hay penalizaciones de potencia de 2-4 dB con las VLC seguras. También se investiga el impacto de la longitud de la clave en la propagación del error y la penalización de potencia. EU Cost Action IC1101 T…

VLCUNESCO::CIENCIAS TECNOLÓGICAS::Tecnología de las telecomunicacionesBERbusiness.industryComputer sciencedecryptionPhysical layerVisible light communicationpower penaltyEncryptionUNESCO::MATEMÁTICAS::Ciencia de los ordenadores::Código y sistemas de codificación:CIENCIAS TECNOLÓGICAS::Tecnología de las telecomunicaciones [UNESCO]Broadcasting (networking)RSABroadcast communication networkBit error rate:MATEMÁTICAS::Ciencia de los ordenadores::Código y sistemas de codificación [UNESCO]businessComputer hardwareencryptionKey sizeComputer networkData transmission
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Experimental Demonstration of 50-Mb/s Visible Light Communications Using 4<inline-formula> <tex-math notation="TeX">$\,\times\,$ </tex…

2014

This letter reports the experimental demonstration of an indoor visible light nonimaging multiple-input multiple-output system with an aggregate error free bit rate of 50 Mb/s over a distance of 2 m. The system uses four independent white LED transmitters, each transmitting 12.5 Mb/s of data in the ON-OFF keying nonreturn zero format, and four independent nonimaging optical receivers. The performance of four detection methods ranging from the basic channel inversion to the more advanced space time techniques is compared experimentally. The results gathered demonstrate that the simplest technique is capable of the same bit error rate as the most complex scheme. The system also provides full …

Engineeringbusiness.industryMIMOOptical communicationVisible light communicationKeyingRangingAtomic and Molecular Physics and OpticsAmplitude-shift keyingElectronic Optical and Magnetic Materialslaw.inventionlawBit error rateElectronic engineeringElectrical and Electronic EngineeringbusinessLight-emitting diodeIEEE Photonics Technology Letters
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Hybrid VLC/WiFi Architectures with Priority Feedback Channels

2022

In this paper, we consider integrating Visible Light Communication (VLC) and WiFi technologies in an ultra-dense (massive) Internet of Things scenario, where WiFi links are used for complementing VLC links and vice-versa. Indeed, in case of mobility and/or bidirectional communications, limited coverage areas and self-generated interference can be an issue. We consider hybrid VLC/WiFi nodes where the VLC link is used for the majority of (data) traffic and the WiFi link is employed as a feedback channel (e.g. transmitting TCP ACKs). In presence of intense WiFi traffic, the WiFi network may be congested and thus, to fully exploit the VLC bandwidth, we discuss possible priority mechanisms to fu…

Visible Light CommunicationVLCEDCARadio FrequencyWiFiHybrid architecture2022 61st FITCE International Congress Future Telecommunications: Infrastructure and Sustainability (FITCE)
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