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Academic literature on the topic 'Technologie Ultra Large Bande (ULB)'
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Journal articles on the topic "Technologie Ultra Large Bande (ULB)"
-Faussurier, E. "Applications Ultra Large Bande (ULB) : cadre et problématique réglementaire." Revue de l'Electricité et de l'Electronique -, no. 04 (2004): 70. http://dx.doi.org/10.3845/ree.2004.040.
Full textElbahar, Fouzia, Atika Rivenq, Marc Hedebaut, Jean-Pierre Ghys, and Jean-Michel Rouvaen. "Communication entre véhicules de transport guidé fondée sur la technologie radio ultra large bande." Recherche - Transports - Sécurité 24, no. 95 (2007): 115–28. http://dx.doi.org/10.3166/rts.95.115-128.
Full textDissertations / Theses on the topic "Technologie Ultra Large Bande (ULB)"
Vauché, Rémy. "Conception de générateurs d'impulsions ultra-large bande en technologie CMOS." Thesis, Aix-Marseille 1, 2011. http://www.theses.fr/2011AIX10098.
Full textThe information theory developed by Claude Shannon (1916 - 2001) highlights the fact that in order to increase the capacity of a transmission channel, it is preferable to extend the bandwidth used rather than the transmission power. This finding is the starting point of many papers on Ultra-Wideband (UWB) which led to the creation in the United States of UWB band since 2002 where no modulation is privileged. Two years later, many works on Impulsionnal Radio UWB (IR-UWB) communications began at IM2NP including the design of low noise amplifier, power detector, but also pulse generators which is the key element of IR-UWB emitters. These form basis of works presented in the manuscript that took place from 2008 to 2011. The discontinuous nature of communications impulse was first implied the introduction of new figures of merit for measuring performances of pulse generators. Then it deals with design techniques for sizing structures operating at frequencies involved, but also to reduce consumption and especially static leakage to reduce enough power consumption for embedded systems. Finally three architectures of pulse generators are developed, each one responding to different constraints in terms of frequency, consumption and range
Devulder, Marie. "Étude et faisabilité d'un système ultra large bande (ULB) en gamme millimétrique en technologie silicium avancée." Thesis, Lille 1, 2008. http://www.theses.fr/2008LIL10149/document.
Full textOver the past few years, consumer wireless communication systems have been implemented using silicon technology (BiCMOS, CMOS). Thanks to the higher operating frequency range of its active components (MOSFET, Heterojunction Bipolar Transistors), silicon technologies have replaced Ill-V technology in wireless communication circuits. Ultra Wideband technologies, used for high power military radars, were recently extended to consumer applications and normalized over the frequency range from 3 to 10 GHz in the United States of America. Within this range, receiver and transmitter architectures are complex. Transposition of a baseband UWB signal at 60 GHz, more precisely the 59-62 GHz band, offers many advantages, such as a simpler system architecture and a reduced die area. SiGe BiCMOS 0.13 µm silicon transistors exhibit a cut-off frequency and a maximum oscillation frequency of 160 GHz. We have designed and measured all the different millimeter circuits of the transceiver such as the oscillator, switch, pulse generator, medium power amplifier, low noise amplifier and detector. The results obtained on these blocks are in agreement with the system specifications we had established. A fully integrated transmitter and a fully integrated receiver circuits were designed and realized. The results demonstrate the capability of silicon technologies for the implementation of new communication systems in the millimeter wave range
Fourquin, Olivier. "Conception et intégration en technologie "System in Package" d'émetteurs récepteurs ultra large bande pour communications ULB impulsionnelles dans la bande de fréquence 3.1 - 10.6 GHz." Thesis, Aix-Marseille 1, 2011. http://www.theses.fr/2011AIX10133/document.
Full textDue to the nature of their signals and their architectures, Impulse Radio Ultra Wide Band (IR-UWB) systems show interesting features to compete with existing technologies (Zigbee, Bluetooth and RFID UHF) for low cost and low power applications. In this context, this thesis evaluates the potential of UWB systems for the realization of miniature communication devices.The thesis presents UWB communicating devices realized with a System in Package (SiP) technology. Devices incorporate one or several CMOS chips and an antenna directly printed on the board (PCB). Transitions between the PCB and the chips are made with standard wire bonds. The thesis especially focuses on packaging of UWB dice and on the design of UWB front end radio frequency.Due to important parasitic elements limiting its bandwidth, wire bonds transition is problematic for UWB applications (3-10 GHz). This thesis proposes several methodologies to interface integrated circuit and PCB to obtain a broadband transition without increasing cost production. The integration in standard CMOS technology of main components comprising the UWB radio frequency front end (LNA, pulse detector and pulse generator) is studied. The interest of a co-design between silicon and PCB to design these elements is pointed up. Integration and miniaturization of the final system in a SIP technology are also presented
Marchaland, David. "Architectures et Circuits dédiés aux Émetteurs Ultra Large Bande Bas Débit." Phd thesis, Université de Marne la Vallée, 2007. http://tel.archives-ouvertes.fr/tel-00260482.
Full textAssociée à ce contexte applicatif, cette thèse propose dans un premier temps une présentation des fondamentaux de la technologie Ultra Large Bande (ULB) suivie par un statut sur la réglementation mondiale et le standard IEEE 802.15.4a ; un cahier des charges d'un émetteur impulsionnel est ainsi établi. Confronté à un état de l'art des générateurs d'impulsions, il met en lumière la nécessité de développer de nouveaux émetteurs, ce que nous proposons à travers une architecture basée autour d'un DAC RF différentiel fonctionnant à 4GHz. Un principe novateur de génération de bursts compatibles avec le standard IEEE 802.15.4a est ensuite développé ; il permet de réduire la complexité globale de l'émetteur. Dans un second temps, l'architecture proposée est dimensionnée au niveau de ses blocs numériques et RFs puis son implémentation est effectuée dans la technologie ST CMOS 65nm. Le principe fonctionnel de l'architecture du générateur est validé par la mesure du circuit qui affiche une efficacité de 38pJ par impulsion pour une fréquence de répétition de 500MHz et une puissance moyenne de sortie de 0dBm.
Zemmour, Hamadache. "Réseaux de capteurs sans fil enfouis ultra large bande : antenne et liens radios." Thesis, Paris Est, 2016. http://www.theses.fr/2016PESC1076/document.
Full textWireless underground sensor networks (WUSN) consist of sensors which are buried in a medium with their antennas, in particular in soil. They attract a huge interest in different fields, like environment monitoring, precise agriculture, navigation and security. The existing narrowband systems operate at frequencies below 1 GHz. These systems imply the use of cumbersome antennas, which complicates the deployment and increases its cost. Furthermore, the use of narrow bandwidths limits the possible communication data rates and the potential resolution in localization applications. Finally, current systems are very energy consuming, which limits the lifetime of the underground elements.To overcome these drawbacks for certain applications of WUSN, we propose in this thesis the use of ultra wideband technology (UWB), in the normalized band 3.1 - 10.6 GHz, in WUSN. This technique allows the use of compact antennas, simplifying deployment, improving the localization accuracy and increasing communication data rates and the lifetime of the underground sensors.In order to assess the feasibility study of UWB WUSN, we have designed and realized three compact UWB antennas and analyzed the effect of soil on the performances of these underground UWB antennas and on the underground UWB communication links. Compared with operating in free space, burying the antenna shifts the antenna bandwidth towards low frequencies. This shift increases with soil water content. The attenuation introduced by the buried UWB channel, increases with the operating frequency, the burial depth and the soil moisture. However, we have shown that reliable communications are possible for distances of propagation in soil smaller than 30 cm and soil water contents below 20%
Hamon, Jérémie. "Oscillateurs et architectures asynchrones pour le traitement des signaux radio impulsionnelle UWB." Grenoble INPG, 2009. http://www.theses.fr/2009INPG0077.
Full textThis PhD thesis studies the advantages and opportunities provided by the asynchronous design style to implement the digital part of an UWB Impulse radio receiver, in the context of wireless sensors networks. Ln one hand, asynchronous digital oscillators have been studied to implement the required time base of an impulse radio receiver. On the other hand, asynchronous algorithms and architectures have been proposed and studied. These different studies demonstrate the efficiency and relevance of the asynchronous design approach to implement this kind of processing, especially on the low power criteria. These studies open the way to fully asynchronous wireless sensor networks
Alhakim, Rshdee. "Optimisation des performances de réseaux de capteurs dynamiques par le contrôle de synchronisation dans les systèmes ultra large bande." Thesis, Grenoble, 2013. http://www.theses.fr/2013GRENT101/document.
Full textThe basic concept of Impulse-Radio UWB (IR-UWB) technology is to transmit and receive baseband impulse waveform streams of very low power density and ultra-short duration pulses (typically at nanosecond scale). These properties of UWB give rise to fine time-domain resolution, rich multipath diversity, low power and low cost on-chip implementation facility, high secure and safety, enhanced penetration capability, high user capacity, and potential spectrum compatibility with existing narrowband systems. Due to all these features, UWB technology has been considered as a feasible technology for WSN applications. While UWB has many reasons to make it a useful and exciting technology for wireless sensor networks and many other applications, it also has some challenges which must be overcome for it to become a popular approach, such as interference from other UWB users, accurate modelling of the UWB channel in various environments, wideband RF component (antennas, low noise amplifiers) designs, accurate synchronization, high sampling rate for digital implementations, and so on. In this thesis, we will focus only on one of the most critical issues in ultra wideband systems: Timing Synchronization
Duroc, Yvan. "Contribution au développement de modèles orientés système pour les antennes des communications Ultra Large Bande." Phd thesis, Grenoble INPG, 2007. http://tel.archives-ouvertes.fr/tel-00157803.
Full textDuroc, Yvan. "Contribution au développement de modèles orientés système pour les antennes des communications ultra large bande." Phd thesis, Grenoble INPG, 2007. http://www.theses.fr/2007INPG0037.
Full textUltra-Wideband is a promising technology for future short-range wireless communications with high data rates as well as radar and localisation. In this thesis, we are interested to UWB antennas and especially to their characterization and modelization. The characteristics of the UWB antennas are emphasized compared to antennas of the narrow band systems. We show that a relevant representation is to model the UWB antennas as linear and time invariant systems. We propose new definitions for the transfer functions and associated impulse responses. The “system” characterization is completed adding parametric modelization to reduce the number of required data and also to integrate the models of the antennas in various simulation systems. The proposed modelings are issued to electromagnetic simulations and measurement in the frequency domain. Moreover, several UWB antennas are considered
Haloua, Abderrahmane. "Étude d’un protocole de communication asynchrone faible consommation à lien radio impulsionnel ultra-large bande : implémentation sur silicium des fonctions RF critiques." Thesis, Aix-Marseille, 2018. http://www.theses.fr/2018AIXM0255.
Full textIn recent years, research has been devoted to the study and development of Wireless Sensor Network (WSN). These research are a response to the increase of the connected objet number in the world with development of smartphones and Internet of things (IoT). Energy consumption in sensor networks is one of the most studied areas. In fact, the optimization of the consumption of the elements making up the sensor networks allows a reduction in the costs associated with their installation, operation and maintenance. Communications in sensor networks represent an important part of their power consumption. In order to reduce the consumption of communications in sensor networks, different levels of optimization are possible. In this context, various IM2NP research projects aimed at reducing transceiver consumption through innovative design were carried out. Much of this work has been devoted to Impulsionnal Radio Ultra-Wide Band (IR-UWB). Moreover, MAC protocols used to manage the communication channel access in wireless sensor networks are also important in optimizing their consumption. The research work proposed in this manuscript, based on the work on impulse radios UWB carried out within the IM2NP, propose an optimization of the consumption of sensor networks on two levels. Firstly, an asynchronous MAC protocol based on radio wake-up radio suitable for UWB communications is proposed as well as its energy study. Following the study of the proposed asynchronous protocol, the design of a low power semi-passive wake-up receiver (WuRx) and a UWB sub-GHz impulse generator is presented and their performance in terms of energy efficiency discussed