Search results for "Multiplexer"

showing 10 items of 30 documents

Multi-application Based Network-on-Chip Design for Mesh-of-Tree Topology Using Global Mapping and Reconfigurable Architecture

2019

This paper outlines a multi-application mapping for Mesh-of-Tree (MoT) topology based Network-on-Chip (NoC) design using reconfigurable architecture. A two phase Particle Swarm Optimization (PSO) has been proposed for reconfigurable architecture to minimize the communication cost. In first phase global mapping is done by combining multiple applications and in second phase, reconfiguration is achieved by switching the cores to near by routers using multiplexers. Experimentations have been carried out for several application benchmarks and synthetic applications generated using TGFF tool. The results show significant improvement in terms of communication cost after reconfiguration.

020203 distributed computingComputer scienceControl reconfigurationParticle swarm optimizationTopology (electrical circuits)02 engineering and technologyNetwork topologyMultiplexingMultiplexer020202 computer hardware & architectureNetwork on a chipComputer architecture0202 electrical engineering electronic engineering information engineeringArchitecture2019 32nd International Conference on VLSI Design and 2019 18th International Conference on Embedded Systems (VLSID)
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The TileCal Optical Multiplexer Board 9U

2011

Abstract TileCal is the hadronic calorimeter of the ATLAS experiment at LHC/CERN. The system contains roughly 10,000 channels of read-out electronics, whose signals are gathered and digitized in the front-end electronics and then transmitted to the counting room through two redundant optical links. Then, the data is received in the back-end system by the Optical Multiplexer Board (OMB) 9U which performs a CRC check to the redundant data to avoid Single Event Upsets errors. A real-time decision is taken on the event-to-event basis to transmit single data to the Read-Out Drivers (RODs) for processing. Due to the low dose level expected during the first years of operations in ATLAS it was deci…

CalorimeterLarge Hadron Colliderbusiness.industryComputer scienceDetectorATLAS experimentPhysics and Astronomy(all)ATLASMultiplexerCRCData acquisitionSoftwareCyclic redundancy checkLHCElectronicsDetectors and Experimental TechniquesbusinessSingle Event UpsetsFPGAComputer hardwarePhysics Procedia
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Wireless ECG and cardiac monitoring systems: State of the art, available commercial devices and useful electronic components

2021

Abstract Wireless ElectroCardioGram (ECG) systems are employed in manifold application fields: tele-monitoring, sport applications, support to ageing people at home, fetal ECG, wearable devices and ambulatory monitoring. The presence of cables often hinders user’s free movements, alongside clinicians’ routine operations. Therefore, wireless ECG systems are desirable. This paper aims at reviewing the solutions described in the literature, besides commercially available devices and electronic components useful to setup laboratory prototypes. Several systems have been developed, different in terms of the adopted technology; when approaching the development of a wireless ECG system, some import…

Computer scienceElectrodemedicine.medical_treatmentWireless communication02 engineering and technology01 natural sciencesMultiplexerlaw.inventionBluetoothElectrocardiographyData acquisitionlawSettore ING-IND/12 - Misure Meccaniche E Termiche0202 electrical engineering electronic engineering information engineeringmedicineMiniaturizationWirelessElectrical and Electronic EngineeringInstrumentationWearable technologyECGbusiness.industryApplied Mathematics020208 electrical & electronic engineering010401 analytical chemistryCondensed Matter Physics0104 chemical sciencesvisual_artElectronic componentvisual_art.visual_art_mediumWireless ECGCardiac monitoringbusinessBiomedical engineeringComputer hardwareMeasurement
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Robustness of 40 Gb/s ASK modulation formats in the practical system infrastructure.

2006

In this work, we analyzed by means of numerical and laboratory experiments the resilience of 40 Gb/s amplitude shift keying modulation formats to transmission impairments in standard single-mode fiber lines as well as to optical filtering introduced by the optical add/drop multiplexer cascade. Our study is a pre-requisite to assess the implementation of cost-effective 40 Gb/s modulation technology in next generation high bit-rate robust optical transport networks. © 2006 Optical Society of America.

Computer scienceOptical communication02 engineering and technologyOptical modulation amplitude01 natural sciencesMultiplexerMultiplexing010309 optics020210 optoelectronics & photonicsOpticsOptical Transport Network0103 physical sciences0202 electrical engineering electronic engineering information engineeringcost effectiveness; frequency shift keying; multiplexingFiberOptical add-drop multiplexerbusiness.industryOptical cross-connectNonlinear opticsOptical performance monitoringAtomic and Molecular Physics and OpticsAmplitude-shift keyingRaman amplifiersModulationPolarization mode dispersionBit error ratebusinessOptics express
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<title>Evolution of optical links toward full-optical transparency</title>

2003

In this paper we review issues of evolution of optical networks towards their full optical transparency and present sequence of eliminating non-transparent elements out of optical links (networks). Architectures of optical commutators with electrical and optical cores have been presented, as well as a structure of OMO (optical-millimeter wave-optical) switching fabric. An example of pure al-optical switch, made by Luxcore, utilizing dispersion compensating elements, wavelength converters and and variable optical attenuators (VOA) operating entirely in optical domain without optical-electrical-optical (OEO) conversions, was quoted. We brought up an issue of all-optical 3R signal regeneration…

EngineeringOptical Transport Networkbusiness.industryOptical cross-connectOptical transistorElectronic engineeringPhysics::OpticsOptical performance monitoringbusinessOptical switchOptical add-drop multiplexerSignal regenerationOptical communications repeaterSPIE Proceedings
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Development of an optical link card for the upgrade phase II of TileCal experiment

2010

This work presents the design of an optical link card developed in the frame of the R&D activities for the phase 2 upgrade of the TileCal experiment as part of the evaluation of different technologies for the final choice in the next two years. The board is designed as a mezzanine which can work independently or plugged in the Optical Multiplexer Board of the TileCal backend electronics. It includes two SNAP 12 optical connectors able to transmit and receive up to 75 Gbps and one SFP optical connector for lower speeds and compatibility with existing hardware as the Read Out Driver. All processing is done in a Stratix II GX FPGA. Details are given on the hardware design including signal and …

Engineeringbusiness.industryFirmwareOptical linkPower integritycomputer.software_genreMultiplexerUpgradeEmbedded systemStratixTransceiverbusinessField-programmable gate arraycomputerComputer hardware2010 17th IEEE-NPSS Real Time Conference
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A readout unit for high rate applications

2002

The LHCb readout unit (RU) is a custom entry stage to the readout network of a data-acquisition or trigger system. It performs subevent building from multiple link inputs toward a readout network via a PCI network interface or alternatively toward a high-speed link, via an S-link interface. Incoming event fragments are derandomized, buffered and assembled into single subevents. This process is based on a low-overhead framing convention and matching of equal event numbers. Programmable logic is used both in the input and output stages of the RU module, which may be configured either as a data-link multiplexer or as entry stage to a readout or trigger network. All FPGAs are interconnected via…

Hardware architectureNuclear and High Energy Physicsbusiness.industryComputer scienceInitializationNetwork interfaceMultiplexingMultiplexerlaw.inventionProgrammable logic deviceMicroprocessorNuclear Energy and EngineeringlawElectronic engineeringElectrical and Electronic EngineeringbusinessField-programmable gate arrayComputer hardwareIEEE Transactions on Nuclear Science
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The Optical Multiplexer Board for the ATLAS Hadronic Tile Calorimeter

2007

This paper presents the architecture and the status of the optical multiplexer board (OMB) for the ATLAS/LHC tile hadronic calorimeter (TileCal). This board will analyze the front-end data CRC to prevent bit and burst errors produced by radiation. Besides, due to its position within the data acquisition chain it will be used to emulate front-end data for tests. The first two prototypes of the final OMB 9U version have been produced at CERN. Detailed design issues and manufacturing features of these prototypes are described. These prototypes are being validated while firmware developments are being implemented in the programmable devices of the board.

Large Hadron ColliderCalorimeter (particle physics)Physics::Instrumentation and Detectorsbusiness.industryFirmwareComputer scienceElectrical engineeringcomputer.software_genreMultiplexerData acquisitionmedicine.anatomical_structureAtlas (anatomy)visual_artNuclear electronicsvisual_art.visual_art_mediummedicineTilebusinesscomputerComputer hardware2007 IEEE Nuclear Science Symposium Conference Record
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Optical flip-flop memory and routing operation based on polarization bistability in optical fiber

2014

A polarization bistability and hysteresis cycle phenomenon is demonstrated in optical fibers thanks to a counter-propagating four-wave mixing interaction. Based on this process, we successfully report the proof-of-principle of an optical flip-flop memory and a 10-Gbit/s routing operation.

Materials scienceBistabilitybusiness.industryOptical cross-connectSingle-mode optical fiberPhysics::OpticsPolarization-maintaining optical fiberOptical performance monitoringOptical switchOpticsOptical transistorFiber optic splitterOptoelectronicsbusinessOptical add-drop multiplexerPhotonic-crystal fiber2014 The European Conference on Optical Communication (ECOC)
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Acoustically driven arrayed waveguide grating.

2015

We demonstrate compact tunable phased-array wavelength-division multiplexers driven by surface acoustic waves (SAWs) in the low GHz range. The devices comprise two couplers, which respectively split and combine the optical signal, linked by an array of single-mode waveguides (WGs). Two different layouts are presented, in which multi-mode interference couplers or free propagating regions were separately employed as couplers. The multiplexers operate on five equally distributed wavelength channels, with a spectral separation of 2 nm. A standing SAW modulates the refractive index of the arrayed WGs. Each wavelength component periodically switches paths between the output channel previously asi…

Materials sciencebusiness.industryPhysics::OpticsAcoustic waveSound powerMultiplexerSignalAtomic and Molecular Physics and OpticsArrayed waveguide gratinglaw.inventionWavelengthOpticsInterference (communication)lawTEORIA DE LA SEÑAL Y COMUNICACIONESbusinessRefractive indexOptics express
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