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Literatura académica sobre el tema "Implémentation 5G temps réel"
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Artículos de revistas sobre el tema "Implémentation 5G temps réel"
Mutegheki, Baraka Vingi. "Application mobile pour consulter les horaires des cours : Vers la numérisation des universités Congolaises". Revue Internationale Multidisciplinaire Etincelle 24, n.º 1 (15 de octubre de 2022): 1–7. http://dx.doi.org/10.61532/rime241112.
Texto completoTessonnier, T., B. Farman-Ara, O. Mundler y L. Tessonnier. "Implémentation en routine clinique d’une méthode simple de reconstruction en temps réel des synchronisations respiratoires par blocage". Médecine Nucléaire 36, n.º 4 (abril de 2012): 188. http://dx.doi.org/10.1016/j.mednuc.2012.02.107.
Texto completoZerhouni, Fatima Zohra, Mankour Zegrar y Amine Boudghène Stambouli. "Amélioration de l’adaptation d’un générateur photovoltaïque à une charge avec implémentation pratique". Journal of Renewable Energies 10, n.º 4 (31 de diciembre de 2007). http://dx.doi.org/10.54966/jreen.v10i4.758.
Texto completoTesis sobre el tema "Implémentation 5G temps réel"
Wang, Tsu-Han. "Real-time Software Architectures and Performance Evaluation Methods for 5G Radio Systems". Electronic Thesis or Diss., Sorbonne université, 2022. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2022SORUS362.pdf.
Texto completoThe thesis deals with 5G real-time Software Defined Radio architectures. In order to match 5G performance requirements, computational acceleration combined with real-time process scheduling methods are required. In 5G embedded systems acceleration amounts to a judicious combination additional hardware units for the most computationally costly functions with software for simpler arithmetic and complex control procedures. Fully software-based solutions are also appearing for certain applications, in particular in the so-called Open Radio-Access Network (openRAN) ecosystem. The contributions of this thesis lie in methods for purely software-based acceleration and real-time control of low-latency fronthaul interfaces. Since 5G has stringent latency requirements and support for very high-speed data traffic, methods for scheduling baseband processing need to be tailored to the specifics of the air-interface. Specifically, we propose a functional decomposition of the 5G air interface which is amenable to multi-core software implementations targeting high-end servers exploiting single-instruction multiple-data (SIMD) acceleration. Moreover, we provide some avenues for multi-threaded processing through pipelining and the use of thread pools. We highlight the methods and their performance evaluation that have been exploited during the development of the OpenAirInterface 5G implementation
Larouche, Jean-Benoit. "Implémentation d'une couche physique temps réel MIMO-OFDM sur FPGA". Thesis, Université Laval, 2014. http://www.theses.ulaval.ca/2014/30389/30389.pdf.
Texto completoThis report is focused on a detailed description of a physical layer implemented on an FPGA platform. The physical layer integrates many of the up to date technologies used in the latest generation telecommunication standards. First of all, an overview of the OFDM and MIMO technologies is presented since both technologies are very important in today’s telecommunications. Thereafter, there is a description of the hardware used to test the proper functioning of the physical layer. The major part of this report is aimed toward the description of the physical layer itself. A detailed block diagram of the latter is presented. The physical layer is divided in two main sections: the transmitter and the receiver. Regarding the transmitter, the structure of the generated packet is presented together with the acquisition and channel estimation symbols. On the receiver side, we will focus on the implemented algorithms to decode a packet. The automatic gain control algorithm, the carrier frequency offset estimator, the block boundary detector and the channel estimator are detailed. Finally, binary error rate curves in an additive white Gaussian noise channel will be presented and compared to theoretical curves. A discussion about the obtained results will follow as well as a list of the future improvements which could be made to take the physical layer further.
Moutault, Sébastien. "Définition et implémentation d'un modèle causal d'exécution temps-réel distribuée". Phd thesis, École Nationale Supérieure des Mines de Paris, 2011. http://pastel.archives-ouvertes.fr/pastel-00667238.
Texto completoMoutault, Sébastien. "Définition et implémentation d'un modèle causal d'exécution temps-réel distribuée". Phd thesis, Paris, ENMP, 2011. https://pastel.hal.science/pastel-00667238.
Texto completoThis work is part of the AROS project. Its goal is to define a fast prototyping tool for dynamic and distributed real-time applications, mostly for automotive industry and robotic. Two distinct methods are normally used to develop distributed real-time applications. The first one -the time triggered approach- is based on worst execution time analysis, whereby time sharing for the various tasks of an application is statically defined. This approach offers considerable safety but the time analysis is sometimes difficult to process. The second one -the priority scheduling approach- is based on ascribing a priority level to each task, which will then allow the system to define an execution order, based on the events is has received. This second approach is more flexible and easier to implement but is less safe and cannot ensure that the application behaves predictably. The structure of the AROS applications being dynamic, the time-triggered approach is irrelevant as it requires a static analysis that cannot be conducted. The priority scheduling approach is also irrelevant because of the non predictable behaviour. We propose an approach based on causal events scheduling inspired by distributed event simulators scheduling techniques. While comparatively easy to use for application designers, this new approach produces applications with a perfectly predictable behaviour. Two main obstacles must be overcome: the real time synchronisation of the execution engine and compliance with real-time constraints
Goma, Raphaël. "Sur la stabilisation des réseaux électriques : mise en oeuvre sur bancs d'essais de commandes non linéaires". Paris 11, 2004. http://www.theses.fr/2004PA112265.
Texto completoThis thesis develops and presents two new nonlinear controllers for power systems stabilization. The first controller is an adaptive nonlinear one using feedback linearisation technique where the system is driven to the new equilibrium point as the adaptation runs, and try to assure better than just asymptotical stability. The second is a robust nonlinear controller for the multi-input multi-output model. It consists of applying nonlinear linearizing and decoupling synchronous machines excitation and turbine gate input. A real-time implementation of these nonlinear controllers is investigated. The experimental setup of these powers systems includes synchronous machine connected to a large power system through a transmission line and a multimachine network. The controllers proposed here are assumed to achieve transient stabilization and voltage regulation when large and sudden faults occur on the transmission line, or to the multimachine network, so that the mechanical power may permanently take any value within its physical bounds. We propose to rebuilt the power angle and the transmission line through available measures. The efficiency of the proposed controllers has been verified via experimental results and compared to the performance of the standard linear controllers such as the Automatic Voltage Regulator (AVR) and Power System Stabilizer (PSS). Results of the experimental studies demonstrate the effectiveness of these nonlinear controllers. It is shown via the experimental results that the operating equilibrium region is enlarged and the inter-area oscillations are also well damped
Abdellatif, Tesnim. "Implémentation rigoureuse des systèmes temps-réels". Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00744508.
Texto completoBoussaid, Lotfi. "Etude et implémentation de descripteurs de contenu AV pour les applications multimedia temps réel". Dijon, 2006. http://www.theses.fr/2006DIJOS049.
Texto completoThe works presented in this thesis contribute to the design of embedded electronic systems which are dedicated for real time multimedia applications. They fall within the framework of design methodology of the new hardware and/or software architecture used for analysis and description of audiovisual content. In this thesis we are first interested in the validation and optimization of shot boundary detection algorithms and in the extraction of high level semantic information using low level audiovisual descriptors. After that, we present the solutions of hardware and/or software implementation related to cut and dissolve detectors at different abstraction levels (logic, RTL and high level based platform). In the last part of this thesis, we propose a generic architecture template for audiovisual content analysis and description. The transposition of this template on embedded systems became possible with the evolution of recently marketed FPGA and the new tools and methodology used on system on programmable chip (SOPC)
Guiard-Marigny, Thierry. "Modélisation tridimensionnelle des articulateurs de la parole : implémentation temps réel et mesures d'intelligibilité bimodale". Grenoble INPG, 1996. http://www.theses.fr/1996INPG0164.
Texto completoLaly, Pierre. "Sondeur de canal MIMO temps réel et applications". Thesis, Lille 1, 2016. http://www.theses.fr/2016LIL10168/document.
Texto completoTo be able to reach a bit rate higher than 100Mb/s with 4G systems and to multiply by 20 the energy efficiency of future 5G networks, all the propagation channel richness must be exploited. This innovative research area dealing with the physical layer optimization is based on the multidimensional channel characterization in "real time". This concept of “real time” means that space, time, frequency and polarimetric dimensions are explored simultaneously to ensure stationarity conditions of the channel during measurements. The channel sounder, subject of the thesis, must also be able to adapt to different scenarios of propagation, including a context of high mobility as, for example, in the case of a communication between high-speed trains. The system that has been developed, based on programmable digital components, allows measuring in a 80Mz bandwidth, 128 transfer functions associated with a (8,16) MIMO channel in less than a few tens of µs and without post-processing. The duration of the transmitted signal is 150 µs. Another originality of this sounder is its easy reconfigurability and its multi-function ability. For example, for studying cyber security of wireless communications, it would play the role of communication system, interference source and channel sounder. In the frame of localization of people in forest owing to their mobile phone, results of channel characterization conducted with the sounder placed either on the ground, or in an ULM, are also described and analyzed
Marin, Yoan. "Développement de nouvelles techniques de Super résolution de séquences vidéo : Vers une implémentation temps réel sur Smart Caméra". Thesis, Bourgogne Franche-Comté, 2020. http://www.theses.fr/2020UBFCK050.
Texto completoThese thesis works are part of an european project aiming to design a very hight resolution (8k) video camera. Within this project our team had the task of working on two technological aspects: (1) the design of a demonstrator carrying out a realtime deconvolution of a video stream coming from a very high resolution camera created by the consortium , (2) the design of a prototype allowing to increase the resolution and the level of detail of video streams from an input resolution of 4k to 8k using Super Resolution (SR) methods. This manuscript mainly presents the work related to the creation of the prototype realizing a Super Resolution method. In order to be able to assess the qualitative contribution of SR, a study on the relevance of the metrics is carried out in order to select the most suitable metrics for evaluating image quality improvement processes. Then, a new method of Spatial SR named LASSR for Local Adaptive Spatial Super Resolution was implemented to correct certain artefacts observed with a State of the Art SR method. Our method allows to locally adapt the processing according the texture, this adaptation is carried out automatically using a decision model generated during supervised learning. Following the validation of our method by a panel of experts during a psychovisual assesment, the IP module was developed to operate with very large volumes of data on FPGA targets and to operate in real time. A toolbox of components has been created in order to describe the module in a generic way. This allows the LASSR module to be adapted to different configurations (image size, pixel dynamics . . .). The major element of this toolbox is the generic 2-D convolution filter : its size and its coecients can be tuned (the FPGA chip limits this filter). Encouraging results have been obtained regarding the increase in resolution for a 4k grayscale output image, it is possible for a single LASSR module to achieve an output frequency of 17.03 fps. On the FPGA of the Xilinx VC707 development board, it is theoretically possible to reach a frequency of 136.2 fps by parallelizing 8 LASSR modules