Dissertations / Theses on the topic 'Génération de signaux de test'
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Mamgain, Ankush. "Génération sur puce de signaux sinusoïdaux à hautes fréquences en utilisant des techniques d'annulation d'harmoniques." Electronic Thesis or Diss., Université Grenoble Alpes, 2024. http://www.theses.fr/2024GRALT024.
Built-in self-test (BIST) techniques play an important role in Analog, Mixed-signal, and RF (AMS-RF) circuits so that the yield in advanced nanometric processes can be improved. These circuits replace highly sophisticated and expensive AMS-RF testers. The stimuli generator is one of the important blocks in AMS-RF BIST circuits. In particular, many analog-RF tests require a high-quality sinusoidal signal as test stimuli. The focus of this thesis is to understand the challenges of generating a sinusoidal signal in GHz range and mitigating these challenges using the harmonic cancellation principle. In harmonic cancellation principle, a set of time-shifted periodic signals are scaled and added. In this process, harmonics of the periodic signal are cancelled and the fundamental frequency is retained at the output. Particularly in this case, a signal generator that can cancel the harmonics below the 11th harmonic. Despite its efficiency, this technique is highly susceptible to performance degradation due to mismatch and process variations. These variations affect time-shift and the duty cycle (also called timing inaccuracies) of the signal, particularly in high-frequency applications where precise control becomes increasingly challenging. To address this, a novel calibration architecture employs a coarse-fine delay cell mechanism, which effectively mitigates the impact of timing inaccuracies. One of the proposed solutions was fabricated using ST 28-nm FDSOI technology and validated. The measurement results show an SFDR greater than 60dBc for frequencies greater than 1 GHz after optimization, illustrating the potential of our architecture in enhancing the reliability and effectiveness of on-chip sinusoidal signal generation for AMS-RF integrated circuits
Asokan, Anu. "Signal Integrity - Aware Pattern Generation for Delay Testing." Thesis, Montpellier, 2015. http://www.theses.fr/2015MONTS206/document.
Advancing nanometer technology scaling enables higher integration on a single chip with minimal feature size. As a consequence, the effects of signal and power integrity issues such as crosstalk noise between interconnects, power supply noise and ground bounce in the supply networks significantly increases. Also, reliability issues are eventually introduced by variations in the manufacturing process. These issues will negatively impact the timing characteristics in an integrated circuit (IC), as they give rise to delay defects. Delay-related parametric failures increase the defect escape rate, yield loss and diminish reliability rate. Hence, design-for-test techniques are employed to have a better controllability and observability on the internal nodes to easily detect and locate the faults. However, they are not always detected by the traditional fault models. In our work, we target these challenges and propose novel physical design-aware path delay test methods to deal with delay faults coming from manufacturing defects or physical design issues. They include the investigation of path delay variations in the presence of crosstalk noise, power supply noise, ground bounce and process variations. Based on this, we develop technology independent test methods for identifying the test patterns that may cause a worst-case delay on a target path. Then, we develop a dedicated test pattern generation method for path delay testing in the presence of crosstalk noise, power supply noise and ground noise. The proposed methods can be used to characterize the path speed and it helps to address the speed binning problem. Also, they can be employed in improving the classical ATPG approach of pattern generation. The application of these contributions can bring tremendous improvements to the IC test quality by ensuring better defect coverage and for an increased manufacturing yield during speed binning of IC chips
Kervella, Gaël. "Circuits intégrés photoniques sur InP pour la génération de signaux hyperfréquences." Thesis, Rennes 1, 2016. http://www.theses.fr/2016REN1S008/document.
This thesis deals with the microwave photonics context. We have implemented various opto- electronic solutions in order to realize a monolithically integrated microwave synthesizer which has a low noise and a wide tunability until millimeter-wave frequencies. The synthesizer is based on the integration of two InP DFB lasers, an optical coupler and a fast photodiode. In addition, an electro-optic modulator is also implemented on the chip in order to transmit data on the generated carrier. The performances obtained in terms of tunability and wireless data transmission proved consistent with the objectives. Thus, a tuning range of 0-110 GHz and a short distance wireless data transmission rate of 1 Gbit /s have been demonstrated, establishing our system to the state of the art for this type of fully integrated component. Phase noise and linewidth performances have however been disappointing. To solve this problem affecting the data rate we have investigated two ways of stabilizing the carrier frequency. The first, based on an electronic feedback loop (OPLL) has yet proved unsuccessful but allowed us to further explore the related issues. However, the second solution, based on a new system of optical cross injection and stabilization to an external electronic oscillator has filled our wishes. Indeed, the stabilization of the carrier frequency by this technique has demonstrated linewidth less than 30 Hz and a reduced phase noise to -90 dBc / Hz at 10 kHz for a given carrier at 90 GHz. Next to the first generation components, a second generation was developed to improve the intrinsic performances of the chip by remedying the limitations previously observed. Thus, a new cavity configuration was designed including longer lasers and high reflectivity integrated mirrors made by materials deep etching. Moreover, optimization of the photodiode structure was carried out to further improve the bandwidth. Such a source allows to consider the generation and modulation of low phase noise and widely tunable microwave signals on monolithically integrated components matching the compactness, reproducibility and high speed performances required by the telecom, defense and space industries
Decrouez, Geoffrey. "Génération de signaux multifractals possédant une structure de branchement sous-jacente." Phd thesis, Grenoble INPG, 2009. http://www.theses.fr/2009INPG0002.
Fractal geometry, pioneered by Mandelbrot in the 70s, has been recognized in many areas of science. The novelty of this thesis is the generation of fractal and multifractal processes with underlying construction tree. I study two models in particular. The first one is a generalisation of Iterated Function Systems (IFS), introduced by Hutchinson in the early 80s. IFS are an efficient tool to generate fractal sets and functions, by iterating a given set of operators. The idea here is to allow a random number of random operators at each iteration of the algorithm. We derive simple conditions under which the IFS possesses a fixed point. A few properties of the fixed point are also investigated. The second model, called Multifractal Embedded Branching Process (MEBP), is obtained via a multifractal time change of a discrete self-similar process, the Canonical EBP (CEBP). We give an efficient simulation online algorithm which generates X(n+1) from X(n) in O(log n) steps. We also derive an upper bound of the multifractal spectrum of the time change and we confirm the theoretical results with simulations. Subordinated Brownian motions are particular cases of MEBP processes, which suggests a potential application of MEBP in finance. Finally, we propose to imitate a fractional Brownian motion with an MEBP
Decrouez, Geoffrey. "Génération de signaux multifractals possédant une structure de branchement sous-jacente." Phd thesis, Grenoble INPG, 2009. http://tel.archives-ouvertes.fr/tel-00353827.
Le premier modèle est une généralisation des Systèmes de fonctions Itérés ou IFS, introduits par Hutchinson dans les années 80. Les IFS constituent un moyen simple et efficace pour produire des ensembles et des processus fractals en itérant un nombre fixed d'opérateurs. L'idée est d'autoriser un nombre aléatoire d'opérateurs aléatoires à chaque itération de l'algorithme. Nous donnons des conditions simples et faciles à vérifier sous lesquelles l'IFS admet un point fixe. Quelques propriétés du point fixe sont également étudiées. Le deuxième modèle, que nous appellons Multifractal Embedded Branching Process (MEBP), s'obtient à l'aide d'un changement de temps multifractal d'un processus à invariance d'échelle discrète, le processus EBP Canonique (CEBP). Nous donnons un algorithm efficace de simulation "on-line" de ces processus, permettant de générer X(n + 1) à partir de X(n) en O(log n) opérations. Nous obtenons également un borne supérieure pour le spectre multifractal du changement de temps et confirmons les résultats théoriques à l'aide de simulations. Les mouvements Browniens en temps multifractal sont des cas particuliers des processus MEBP, ce qui suggère une application potentielle des processus MEBP en finance. Enfin, nous proposons d'imiter un mouvement Brownien fractionnaire à l'aide d'un processus MEBP.
Lelièvre, Oriane. "Oscillateurs optoélectroniques pour la génération de signaux microondes à grande pureté spectrale." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS061.
High purity microwave signal generation is required in various applications (RADAR systems, wideband sampling). For high frequency operations, optics offer promising solutions to generate low noise oscillators. The objective of this thesis consists in studying various optoelectronic oscillator (OEO) configurations at 10 GHz. We first worked on a phase noise model and its experimental validation, further extended to multiple loop OEOs. This comprehensive model allowed the design of a state-of-the-art dual loop OEO with consideration to its compactness (first spur located at 187 kHz from the carrier with a phase noise level of 146 dBc/Hz).We then focused on all photonic gain OEOs to get rid of RF amplifiers whose bandwidth and noise contributions are a limit for high frequency operations. Finally, we studied coupled optoelectronic oscillators (COEOs) which may simply be described as a combination of a mode locked laser and an OEO. We worked on a phase noise model for active and harmonically mode locked laser taking into account for the first time the non-orthogonality of the cavity modes. This model is the basis to a COEO model we began to develop. After experimentally determining key parameters, we designed and optimized a low noise COEO exhibiting a close-to-carrier phase noise similar to the state-of-the-art
Abdi, Abyaneh Mohammad. "Génération des signaux agrégés en fréquences dans le contexte de LTE-A." Electronic Thesis or Diss., Paris, ENST, 2016. https://pastel.hal.science/tel-03689710.
In this dissertation, a signal generation structure is proposed using which a multitone Local Oscillator (LO) signal is created by a single I/Q modulator. These LOs can be used in the CA receivers to down-convert the transmitted component carriers simultaneously. The multi-tone LO signal structure is further developed to be used at the transmitter as a CA generation solution. Using the proposed structure n-component carriers can be generated in parallel. This structures requires lower sampling rates with respect to the case where RF signals are synthesized directly by digital-to- analog converters. Moreover, less circuitry is required, because one single I/Q modulator is used to generate n component carriers, instead of n I/Q modulators. This work follows on investigating the origin of impairments and mild nonlinearities in our I/Q modulator. To overcome these problems, we focus on the functionality of the overall system rather than each component of the I/Q modulator. This method is called behavioral modeling. Once the nonlinear model is obtained, if its inverse function is applied to the input, a linearized output is expected. The generation of the inverse function is called Digital Pre-Distortion (DPD). We propose a tri-band behavioral model for nonlinearities and impairments in tri-band CA using our I/Q modulator. Furthermore, the DPD of the model is evaluated in simulations and experiments
Voon, Lew Yan, and Lew Fock Chong. "Contribution au test intégré déterministe : structures de génération de vecteurs de test." Montpellier 2, 1992. http://www.theses.fr/1992MON20035.
Damri, Laila. "Génération de séquences de test pour l'accélération d'assertions." Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00838669.
Martiel, Jean-Louis. "Étude par un modèle de la génération périodique des signaux chimiotactiques chez dictyostelium discoideum." Habilitation à diriger des recherches, Université Paris Sud - Paris XI, 1988. http://tel.archives-ouvertes.fr/tel-00328959.
Khwaja, Shaharyar. "Génération rapide de signaux radar d'environnements complexes pour la simulation de systèmes imageurs SAR." Phd thesis, Université Rennes 1, 2008. http://tel.archives-ouvertes.fr/tel-00371992.
Goutain, Eric. "Etude et développement de diodes lasers sur InP pour la génération de signaux millimétriques." Lille 1, 1996. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/1996/50376-1996-266.pdf.
Frappé, Antoine. "Génération numérique de signaux RF pour les terminaux de communication mobile par modulation delta-sigma." Phd thesis, Université des Sciences et Technologie de Lille - Lille I, 2007. http://tel.archives-ouvertes.fr/tel-00280968.
Le standard UMTS a été choisi comme exemple d'application et un générateur de signaux RF 1 bit à 7,8Géch/s a été réalisé dans une technologie 90nm CMOS. Une arithmétique redondante comprenant des signaux complémentaires, une quantification de sortie non exacte et une évaluation anticipée de la sortie ont été implémentées pour parvenir à la cadence désirée. Une logique dynamique différentielle sur 3 phases d'horloge, générées par une DLL, a été utilisée au niveau circuit.
Le circuit intégré du transmetteur prototype démontre une fonctionnalité complète jusqu'à une fréquence d'horloge de 4GHz, permettant ainsi d'atteindre une bande passante de 50MHz autour d'une fréquence porteuse de 1GHz. Si la bande image est utilisée, la fréquence d'émission peut être déplacée jusqu'à 3GHz. Avec une fréquence d'horloge de 2,6GHz et un canal WCDMA de 5MHz modulé autour d'une fréquence porteuse à 650MHz, 53,6dB d'ACLR sont obtenus pour une puissance de canal en sortie de -3,9dBm. Pour la bande image (1,95GHz), l'ACPR est de 44,3dB pour une puissance maximale du canal en sortie de -15,8dBm, ce qui rentre dans les spécifications UMTS. L'aire active du circuit est de 0,15mm² et sa consommation de 69mW sous 1V à cette fréquence.
Campuzano, Gabriel. "Génération et télécontrôle de signaux radiofréquences par synchronisations optiques multiples de lasers à semi-conducteurs." Paris, ENST, 2003. http://www.theses.fr/2003ENST0046.
RF signal generation, based on the transmission and heterodyning of optical signals with different frequency and strongly correlated phases, is an attractive technique for provisioning radio over fiber networks. Optical synchronization of two slave lasers on the modulation sidebands of a directly modulated master laser achieves a strong phase correlation. The theoretical approach, on the on hand, consists in analyzing the optical link performance where the phase noise of the RF generated carrier is calculated. It was determined that errorless transmissions using a 60 GHz carrier modulated by a QPSK 155 Mbps data stream over distances around 15 km are possible as long as the fiber dispersion is compensated by a differential delay between slave lasers. On the other hand, a method based on the coupled-wave theory for describing the optically induced frequency and gain variations of distributed feedback lasers allowed to establish the locking bandwidth dependence on the Bragg grating characteristics of the cavity. In the experimental approach, optical low-coherence reflectometry is used for measuring these frequency and gain variations giving as a result an estimation of the Henry linewidth enhancement factor. An experimental procedure is developed for optimizing the RF carrier spectral characteristics in terms of the power spectral densities of the lasers and of the injection conditions. RF carriers up to 20 GHz were generated with a sub-hertz phase noise, a signal to noise ratio >45dB, and residual frequency rejection rate >23dB
Rarivomanana, Jens A. "Système CADOC : génération fonctionnelle de test pour les circuits complexes." Phd thesis, Grenoble INPG, 1985. http://tel.archives-ouvertes.fr/tel-00319028.
Tka, Mouna. "Génération automatique de test pour les contrôleurs logiques programmables synchrones." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAM020/document.
This thesis work done in the context of the FUI project Minalogic Bluesky, concerns the automated functional testing of a particular class of programmable logic controllers (em4) produced by InnoVista Sensors. These are synchronous systems that are programmed by means of an integrated development environment (IDE). People who use and program these controllers are not necessarily expert programmers. The development of software applications should be as result simple and intuitive. This should also be the case for testing. Although applications defined by these users need not be very critical, it is important to test them adequately and effectively. A simulator included in the IDE allows programmers to test their programs in a way that remains informal and interactive by manually entering test data.Based on previous research in the area of synchronous test programs, we propose a new test specification language, called SPTL (Synchronous Testing Programs Language) which makes possible to simply express test scenarios that can be executed on the fly to automatically generate test input sequences. It also allows describing the environment in which the system evolves to put conditions on inputs to arrive to realistic test data and limit unnecessary ones. SPTL facilitates this testing task by introducing concepts such as user profiles, groups and categories. We have designed and developed a prototype named "Testium", which translates a SPTL program to a set of constraints used by a Prolog solver that randomly selects the test inputs. So, generating test data is based on constraint logic programming techniques.To assess this, we experimented this method on realistic and typical examples of em4 applications. Although SPTL was evaluated on EM4, its use can be envisaged for the validation of other types of synchronous controllers or systems
Bianchi, Christophe. "Génération fonctionnelle du test de circuits a haute densité d’intégration." Lyon, INSA, 1990. http://www.theses.fr/1990ISAL0053.
This document describes an innovative approach in the field of test generation for high density integrated circuits. In the framework of a silicon compiler design tool, a functional methodology for test generation has been defined, developped and validated. The results obtained show the pertinenc:yof this methodology that gives efficient test patterns adapted to the functional verification of prototypes
Rodriguez, Béatrice. "Contribution au test des pannes temporelles : diagnostic et génération de vecteurs de test orientée diagnostic." Montpellier 2, 1996. http://www.theses.fr/1996MON20111.
Ghannem, Adnane. "Test des applications WEB : modélisation et génération de séquences de test basées sur le contrôle." Thèse, Université du Québec à Trois-Rivières, 2006. http://depot-e.uqtr.ca/1973/1/000135081.pdf.
Desmoulin, Alexandra. "Test d'interopérabilité de protocoles : de la formalisation des critères d'interopérabilité à la génération des test." Rennes 1, 2007. ftp://ftp.irisa.fr/techreports/theses/2007/desmoulin.pdf.
This thesis deals with the domain of protocol interoperability testing. The objective is to verify that different network components are able to communicate correctly while providing the service described in their respective specification. We propose a formal definition of the interoperability notion using interoperability criteria that precise conditions to be verified by components to be considered interoperable. We propose an automatic test generation method for the most used context of two components interoperability testing. This method avoids the state space explosion problem that interoperability test generation generally faces. A specific problem of the interoperability testing domain is the verification of the actual reception of a message that was sent to a component. We propose a solution based on causal dependencies between messages. For the interoperability of multiple components (more than two), we propose a classification of the possible testing architectures, definitions of interoperability criteria, a methodology for the choice of interconnection topologies to be used and some elements for the test derivation
Bouchand, Romain. "Génération photonique de signaux micro-ondes très bas bruit de phase par peignes de fréquences optiques." Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066507/document.
State-of-the-art microwave oscillators are typically bulky systems requiring tedious maintenance which is hindering their use in mobile applications or in demanding environments. The invention of the optical frequency combs, which was awarded a Nobel prize in 2005, was a game-changer as it enabled a high-fidelity transfer of the unrivalled properties of optical oscillators to the microwave domain. In the technique used at SYRTE, the optical frequency division, a microwave signal can be extracted from a near-infrared ultra-stable laser using photodetection. The transfer is accompanied by a reduction of phase noise equal to the microwave-to-optical frequency ratio squared, i.e. more than eight order of magnitudes. This benefit is however reduced by several processes producing excess noise during the transfer. The work described in this thesis is the generation of the lowest phase noise microwave signal ever reported. The different processes inducing excess noise are analyzed and, in part, overcome. Specifically, the conversion of the femtosecond laser intensity noise to the microwave phase noise is studied thoroughly and its effect significantly reduced. The results augur that the optical approaches in microwave generation are on the verge to disrupt the state-of-the-art. The noise levels demonstrated and the techniques developed can benefit a large range of applications such as mobile radars, time and frequency metrology or the next generation of ultrafast telecommunication networks
Ben, romdhane Manel. "Échantillonnage non uniforme appliqué à la numérisation des signaux radio multistandard." Phd thesis, Télécom ParisTech, 2009. http://pastel.archives-ouvertes.fr/pastel-00004780.
Karam, Margot. "Génération de test de circuits intégrés fondée sur des modèles fonctionnels." Phd thesis, Grenoble INPG, 1991. http://tel.archives-ouvertes.fr/tel-00339935.
Pravossoudovitch, Serge. "Contribution au test des circuits intégrés MOS : génération automatique de vecteurs de test au niveau transistors interrupteurs." Montpellier 2, 1987. http://www.theses.fr/1987MON20213.
Joly, Jean-Luc. "Contributions à la génération aléatoire pour des classes d'automates finis." Thesis, Besançon, 2016. http://www.theses.fr/2016BESA2012/document.
The concept of automata, central to language theory, is the natural and efficient tool to apprehendvarious practical problems.The intensive use of finite automata in an algorithmic framework is illustrated by numerous researchworks.The correctness and the evaluation of performance are the two fundamental issues of algorithmics.A classic method to evaluate an algorithm is based on the controlled random generation of inputs.The work described in this thesis lies within this context and more specifically in the field of theuniform random generation of finite automata.The following presentation first proposes to design a deterministic, real time, pushdown automatagenerator. This design builds on the symbolic method. Theoretical results and an experimental studyare given.This design builds on the symbolic method. Theoretical results and an experimental study are given.A random generator of non deterministic automata then illustrates the flexibility of the Markov ChainMonte Carlo methods (MCMC) as well as the implementation of the Metropolis-Hastings algorithm tosample up to isomorphism. A result about the mixing time in the general framework is given.The MCMC sampling methods raise the problem of the mixing time in the chain. By drawing on worksalready completed to design a random generator of partially ordered automata, this work shows howvarious statistical tools can form a basis to address this issue
Vassy, Jérôme. "Génération automatique de cas de test guidée par les propriétés de sûreté." Phd thesis, Université Joseph Fourier (Grenoble), 2004. http://tel.archives-ouvertes.fr/tel-00007373.
Virazel, Arnaud. "Test intégré des circuits digitaux : analyse et génération de séquences aléatoires adjacentes." Montpellier 2, 2001. http://www.theses.fr/2001MON20094.
Millo, Jacques. "Génération de signaux micro-ondes pour la métrologie à partir de références et de peignes de fréquences optiques." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2010. http://tel.archives-ouvertes.fr/tel-00637969.
Patin, Benjamin. "Matériaux et Dispositifs optoélectroniques pour la génération et la détection de signaux THz impulsionnels par photocommutation à 1,55µm." Phd thesis, Université de Grenoble, 2013. http://tel.archives-ouvertes.fr/tel-00954635.
Jankowski, Andrzej. "Circuits intégrés photoniques sur InP pour la génération de signaux de puissance dans la gamme des ondes millimétriques." Thesis, Université Grenoble Alpes (ComUE), 2019. http://www.theses.fr/2019GREAT126.
The analog or digital signal transmissions at millimeter wave frequencies play a key role in many industrial and research areas such as telecommunication, spectroscopy and IT. They also find several applications in radar observation systems. The optical signal generation provides efficient solutions to generate high frequency signals in a wide range. In this PhD thesis the heterodyne beat of two optical signals with a fast photodiode used as a photomixer is employed. We have focused our work on the development of optoelectronic integrated circuits that combine several photodiodes in order to overcome the single device limitations and increase the generated output power. The photomixers consist in Uni-Travelling-Carrier photodiodes (UTC-PD) that are integrated in an InP-based circuit also including passive optical waveguides, MMI couplers, electrical power supply and microwave devices.In this PhD thesis two approaches for high output power generation in the mm-wave frequency domain are studied. The first approach is based on the design and characterization of a new generation of the 2-way and 4-way Wilkinson power combiners with UTC photodiodes with coplanar waveguide output. This solution target the frequency range at ca. 70 GHz. The total bandwidth at which the Wilkinson power combiner achieves optimal performance is ca. 6 GHz and 3 GHz for the 2-way and 4-way topology, respectively. The second approach is based on the antenna-integrated UTC photodiodes structures. The folded-dipole and bow-tie antenna topologies are studied, designed and fabricated. The 3x folded-dipole antenna-integrated UTC PD design target the frequency range from 90 GHz to 110 GHz, but based on the HFSS simulation results, additional bands can be found up to 300 GHz. More broadband design is obtained with the bow-tie antenna structures. Obtained bandwidth varies from 46 GHz for the 3x bow-tie antenna-integrated UTC PD design, reaching 126 GHz in the case of 2x bow-tie antenna-integrated UTC PD. All devices have been fabricated on the same InP substrate using cleanroom processes and have been experimentally characterized
Do, Thi Phuong. "Oscillateurs optoélectroniques à base de résonateurs silicium pour applications à la génération de signaux hyperfréquences et aux capteurs." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLN024/document.
This work focuses on the insertion of silicon ring resonators into the loops of optoelectronic oscillators (OEO) for the generation of low phase noise microwave signals and is a contribution to the future full integration of OEO systems on single silicon chips. The application orientation that was explored was to evaluate the performance of these systems for bulk optical index detection. Two different configurations of silicon ring resonators based OEO have been proposed and demonstrated: OEO based on millimeter-long silicon ring resonators and tunable OEO based on more compact silicon ring resonators and a specific optical carrier reinjection scheme.In the first approach, the optical signal is used as an optical carrier, which is modulated by an intensity modulator that produces a set of sidebands in the optical domain, while the ring resonator generates an optical comb that acts as an optical filter, translating its Free Spectral Range (FSR) into the microwave domain. By the beating of two adjacent optical comb lines in a photodetector, the optical spectral lines are then translated into the RF domain. The contribution of our work has been to demonstrate that the realization of millimeter resonators (about 6mm) in silicon photonics was a viable and interesting approach for the direct realization of OEO. In the investigated configurations, SOI ring resonators were optimized to satisfy the required target of a FSR of around 15GHz and an optical quality factor above 10^5. The demonstrated experimental results showed the viability and the stability of the proposed approach, while phase noise level of -100dBc/Hz at an offset of 100 kHz from carrier was obtained and sensing capability of the studied system was quantified to around 3.72 GHz/RIU for a refractive index variation in the range of 1.572 to 1.688, in good agreement with simulation results.In a complementary direction to this first step, we addressed the very important issue of the tunability of the frequency of the microwave signal generated. To this end, we proposed, designed, and then developed and tested an original OEO configuration based on the use of a single modulation band and a mechanism for reinjection of the optical carrier from the loop laser. In this scheme, the oscillation signal is created under the beating between the laser light beam and a single modulation signal sideband selected by an add-drop ring resonator working as an effective optical bandpass filter. In the implementation we have carried out, a SOI photonic resonator with a FSR of 77 GHz and an optical quality factor at 8.1×10^4 was used. By changing the laser frequency while keeping a fixed resonator resonance wavelength, a tunability from 5.8GHz to 18.2GHz was demonstrated, being only limited by the working operation of the RF amplifier used in the carried out experiments. Meanwhile, a phase noise level of -115 dBc/Hz at 1MHz offset frequency was obtained for all generated signals, showing the possibility of creating high oscillation frequencies with the same phase noise level. We then applied this approach for bulk refractive index sensing application and demonstrated a sensing sensitivity of 94350GHz/RIU and an index limit of detection of 10^-8 RIU by considering a signal resolution of 1MHz. Beyond these experimental results, the contribution of this second approach provides a simple and flexible solution to the problem of generating microwave signals with variable frequencies on demand, and opens up very rich application perspectives.All the results of the thesis contribute to the question of the integration of OEOs on silicon chips and make it possible to anticipate various applications in the field of communications and sensors
Leroux, (zinovieva) Elena. "Méthodes symboliques pour la génération de tests desystèmes réactifs comportant des données." Phd thesis, Université Rennes 1, 2004. http://tel.archives-ouvertes.fr/tel-00142441.
de transitions ne permet pas de le faire. Ceci oblige à énumérer les valeurs des données avant de construire le modèle de système de transitions d'un système, ce qui peut provoquer le problème de l'explosion de l'espace d'états. Cette énumération a également pour effet d'obtenir des cas de test où toutes les données sont instanciées. Or, cela contredit la pratique industrielle où les cas de test sont de vrais programmes avec des variables et des paramètres. La génération de tels
cas de test exige de nouveaux modèles et techniques. Dans cette thèse, nous atteignons deux objectifs. D'une part, nous introduisons un modèle appelé système symbolique de transitions à entrée/sortie qui inclut explicitement toutes les données d'un système réactif. D'autre part, nous proposons et implémentons une nouvelle technique de génération de test qui traite symboliquement les données d'un système en combinant l'approche de génération de test proposée auparavant par notre groupe de recherche avec des techniques d'interprétation abstraite. Les cas de test générés automatiquement par notre technique satisfont des propriétés de correction: ils émettent toujours un verdict correct.
Bontron, Pierre. "Les schémas de test : une abstraction pour la génération de tests de conformité et pour la mesure de couverture." Phd thesis, Université Joseph Fourier (Grenoble), 2005. http://tel.archives-ouvertes.fr/tel-00010058.
Al, Mahrous Mazen. "Génération de test fonctionnel de circuits digitaux décrits avec un langage déclaratif : Lustre." Phd thesis, Grenoble INPG, 1990. http://tel.archives-ouvertes.fr/tel-00337894.
Bannino, Joseph. "Approche connexionniste pour la génération automatique de séquences de test de circuits digitaux." Chambéry, 1997. http://www.theses.fr/1997CHAMS007.
Pous, Nicolas. "Analyse de signaux analogiques/radiofréquences à l'aide de ressources digitales en vue du test." Phd thesis, Université Montpellier II - Sciences et Techniques du Languedoc, 2011. http://tel.archives-ouvertes.fr/tel-00667202.
Siegert, Raimund Ulrich. "Bruit engendré par les rotors d'hélicoptères. Etude des mécanismes de génération de bruit et contribution à l'analyse de signaux expérimentaux." Toulouse 3, 1995. http://www.theses.fr/1995TOU30290.
Schnebelin, Côme. "Analyse et génération de signaux dans les boucles optiques à décalage de fréquence : analogie spatiale et nouveaux concepts d'auto-imagerie." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAY028.
Signal generation and processing techniques suffer from intrinsic limitations of electronic systems: limited bandwidth, sensitivity to electromagnetic interference, bulk and cost. On the contrary, optical systems naturally overcome these constraints and are potentially very attractive for the generation and processing of signals. During this thesis, we studied an original optical system used for microwave photonics: frequency shifting loops.The temporal properties of these loops have a strong link with some properties of the Talbot effect in spatial optics. This duality has been successful during this work, because it led us to demonstrate many properties both in time optics in the frequency shifting loops, and in spatial optics with simple diffraction setup.We have thus demonstrated the possibility of analogically calculating the Fourier transform and the fractional Fourier transform of an arbitrary signal, with a very good spectral resolution. This allowed us to measure the "chirp" rate of a linearly frequency modulated signal, or to improve the signal-to-noise ratio of some signals. We have also shown the possibility to generate pulse trains with an adjustable repetition rate, and to make spectral shaping of high resolution, in amplitude and phase. This result has been used to generate arbitrary optical or radiofrequency signals with bandwidths of several tens of GHz and durations of up to several tens of ns.The properties of the duality between spatial optics and frequency shifting loops led us to reinterpret a number of properties of the Talbot effect (image formation, self-healing of Talbot images) and to propose new concepts, such as control of Talbot images (period and size) or image amplification
Afonso, George. "Vers une nouvelle génération de systèmes de test et de simulation avionique dynamiquement reconfigurables." Phd thesis, Université des Sciences et Technologie de Lille - Lille I, 2013. http://tel.archives-ouvertes.fr/tel-00921874.
Duffaut, Olivier. "Problématique multi-modèle pour la génération d'arbres de test : application au domaine de l'automobile." Toulouse, ENSAE, 1994. http://www.theses.fr/1994ESAE0005.
Kebichi, Omar. "Techniques et outils de CAO pour la génération automatique de test intégré pour RAMs." Grenoble INPG, 1994. http://www.theses.fr/1994INPG0062.
Hamdi, Belgacem. "Outils CAO pour la génération automatique de parties opératives auto-controlables." Grenoble INPG, 1994. http://www.theses.fr/1994INPG0041.
Ye, Wei-Ming. "Étude de la pertinence de modélisation paramétrique de signaux pour le test aléatoire des microprocesseurs." Toulouse, INPT, 1987. http://www.theses.fr/1987INPT004H.
Gouraud, Sandrine-Dominique. "Utilisation des Structures Combinatoires pour le Test Statistique." Phd thesis, Université Paris Sud - Paris XI, 2004. http://tel.archives-ouvertes.fr/tel-00011191.
logiciel à partir d'une description graphique des comportements du
système à tester (graphe de contrôle, statecharts). Son originalité
repose sur la combinaison de résultats et d'outils de combinatoire
(génération aléatoire de structures combinatoires) et d'un solveur de
contraintes, pour obtenir une méthode de test complètement automatisée.
Contrairement aux approches classiques qui tirent des entrées, la
génération aléatoire uniforme est utilisée pour tirer des chemins parmi
un ensemble de chemins d'exécution ou de traces du système à tester.
Puis, une étape de résolution de contraintes est utilisée pour
déterminer les entrées qui permettront d'exécuter ces chemins.
De plus, nous montrons comment les techniques de programmation
linéaire peuvent améliorer la qualité d'un ensemble de tests.
Une première application a été effectuée pour le test statistique
structurel défini par Thévenod-Fosse et Waeselynck (LAAS) et un
prototype a été développé.
Des expériences (plus de 10000 réalisées sur quatre fonctions issues
d'un logiciel industriel) ont été effectuées pour évaluer notre approche
et sa stabilité.
Ces expériences montrent que notre approche est comparable à celle
du LAAS, est stable et a l'avantage d'être complètement automatisée.
Ces premières expériences nous permettent également d'envisager un
passage à l'échelle de notre approche. Plus généralement, ces travaux
pourraient servir de base pour une nouvelle classe d'outils dans le
domaine du test de logiciel, combinant génération aléatoire de
structures combinatoires, techniques de programmation linéaire et
résolution de contraintes.
Florès, Laurent. "Branddelphi : une nouvelle méthode de génération d'idées pour la mise à jour des "signaux faibles" dans le développement des nouveaux produits." Grenoble 2, 2005. http://www.theses.fr/2005GRE21031.
Having illustrated the importance of idea generation in the new product development process and certain weaknesses of existing methods to detect "weak signals" ideas to drive successful product innovation, the author offers the development of a new ideation method : Branddelphi. Inspired from certains principles of brainstorming (Osborn, 1953), information theory (Shannon, 1948), Delphi method (Dalkey, 1969), evolutionary and adaptive algorithms (Seck, 1996, Goldberg, 2000). The method is developed, tested and validadted in terms of reliability, internal and external validities in two product categories (involving, not involving) and show superior performance in comparison to brainstorming and Delphi method. Future research directions are highlighted with specific interest in idea stating rather than content only, the control and sequential involvement of different consumers (Roger, 1983), as well as different alternatives for algorithm optimization and consumers optimal creative simulation (Zaltman, 2003)
Molina, Villegas Alejandro. "Compression automatique de phrases : une étude vers la génération de résumés." Phd thesis, Université d'Avignon, 2013. http://tel.archives-ouvertes.fr/tel-00998924.
Dargelas, Alain. "Approche multi-stratégique pour la génération déterministe de vecteurs de test de circuits séquentiels synchrones." Montpellier 2, 1997. http://www.theses.fr/1997MON20033.
Griche, Karim-Cyril. "Génération automatique de bouchons pour le test structurel basée sur l'analyse du flot de contrôle." Université Joseph Fourier (Grenoble), 2005. http://www.theses.fr/2005GRE10098.
While developing a software, many different tests are processed. Ln this thesis, we are focusing mainly on unitary test and integration test. During the unitary test phase, the software's entities are tested individually. Afterwards, they are integrated within an aggregate on which the integration test is lrocessed. During this phase, interactions between entities are tested. We are working on structural unitary test. During this test phase, when the entites under test contains calls to other entites, the called entities are replaced by stubbs designed to simplify test data generation for the calling function. Ln general, such stubbs do not represent correctly the behaviour of the entity they stand for. Therefore, the resulting covering rate does not represent the use of the calling function. In this thesis, we propose a new test phase, the unitary aggregate test phase, where ail necessary stubbs are automatically generated from the called function's code. The production of such a stubb is based on the slice of the called function's control flow into approximations. Tatic analysis is used to deterrnine the specifie environment of each cali. This environment con tains information on the calling conditions for a function and also on the impact ofthis cali on the calling function's control flow. The stubb for a specifie cali can be created by filtering the called function's approximations, using the calling context. Then, a single filtered approximation is kept for each generation objective within the calling function. A prototype of this method was implemented within the Inka test tool
Naha, Marius. "Génération de séquences de test à partir des diagrammes de collaboration UML : implémentation et évaluation." Thèse, Université du Québec à Trois-Rivières, 2004. http://depot-e.uqtr.ca/1489/1/000122261.pdf.
Ye, Wei-Ming. "Etude de la pertinence de la modélisation paramétrique de signaux pour le test aléatoire des microprocesseurs." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37610802g.