Dissertations / Theses on the topic 'Radio-logicielle'
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Haghighitalab, Delaram. "Récepteur radio-logicielle hautement numérisé." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066443.
Full textNowadays there is an increase in the number of standards being integrated in mobile devices. The main issues are battery life and the size of the device. The idea of a Software Defined Radio is to push the digitization process as close as possible to the antenna. Having most of the circuit in the digital domain allows it to be reconfigurable thus requiring less area and power consumption. In this thesis, we present the first implementation of a complete SDR receiver based on RF bandpass Sigma-Delta including a Variable-Gain LNA (VGLNA), an RF subsampled Sigma-Delta ADC, an RF digital down-conversion mixer and a polyphase multi-stage multi-rate decimation filter. VGLNA enlarges the dynamic range of the multi-standard receiver to achieve the requirements of the three targeted wireless standards. Also a mixed architecture, using both Source-Coupled Logic (SCL) and CMOS circuits, is proposed to optimize the power consumption of the RF digital circuits. Moreover, we propose a multi-stage comb filter architecture with polyphase decomposition to reduce the power consumption. The receiver is measured for three different standards in the 2.4 GHz ISM-band. Measurement results show that the receiver achieves 79 dB, 73 dB and 63 dB of dynamic range for the Bluetooth, ZigBee and WiFi standards respectively. The complete receiver, implemented in 130 nm CMOS process, has a 300 MHz tunable central frequency and consumes 63 mW under 1.2 V supply. Compared to other SDR receivers, the proposed circuit consumes 30% less power, the DR is 21 dB higher, IIP3 is 6 dB higher and the overall Figure of Merit is 24 dB higher
Haghighitalab, Delaram. "Récepteur radio-logicielle hautement numérisé." Electronic Thesis or Diss., Paris 6, 2015. http://www.theses.fr/2015PA066443.
Full textNowadays there is an increase in the number of standards being integrated in mobile devices. The main issues are battery life and the size of the device. The idea of a Software Defined Radio is to push the digitization process as close as possible to the antenna. Having most of the circuit in the digital domain allows it to be reconfigurable thus requiring less area and power consumption. In this thesis, we present the first implementation of a complete SDR receiver based on RF bandpass Sigma-Delta including a Variable-Gain LNA (VGLNA), an RF subsampled Sigma-Delta ADC, an RF digital down-conversion mixer and a polyphase multi-stage multi-rate decimation filter. VGLNA enlarges the dynamic range of the multi-standard receiver to achieve the requirements of the three targeted wireless standards. Also a mixed architecture, using both Source-Coupled Logic (SCL) and CMOS circuits, is proposed to optimize the power consumption of the RF digital circuits. Moreover, we propose a multi-stage comb filter architecture with polyphase decomposition to reduce the power consumption. The receiver is measured for three different standards in the 2.4 GHz ISM-band. Measurement results show that the receiver achieves 79 dB, 73 dB and 63 dB of dynamic range for the Bluetooth, ZigBee and WiFi standards respectively. The complete receiver, implemented in 130 nm CMOS process, has a 300 MHz tunable central frequency and consumes 63 mW under 1.2 V supply. Compared to other SDR receivers, the proposed circuit consumes 30% less power, the DR is 21 dB higher, IIP3 is 6 dB higher and the overall Figure of Merit is 24 dB higher
Ben, Abdallah Riadh. "Machine virtuelle pour la radio logicielle." Lyon, INSA, 2010. http://theses.insa-lyon.fr/publication/2010ISAL0086/these.pdf.
Full textThe hardware architectures dedicated to software radio are complex to handle. Automatic transition from modeling to implementation has many benefits and represents important economic perspectives. However the proposed approaches for software radios modeling, found in the state of the art, are specific to particular execution platforms. Indeed, moving to implementation is generally done through compilation and code generation techniques. In all cases, the generated executable program is definitively targeted for a specific platform. In this thesis, we propose a virtual machine based programming model which can express different physical layer protocols independently of the target platform. To this model we defined an associated language compilable into a high level byte-code to be executed by the radio virtual machine (which itself is executed by either a classic native processor or dedicated hardware) for configuration and control of radio platforms. The radio virtual machine was first tested functionally on a software platform (PC). Then, it has been experimented on a realistic platform with real-time constraints consideration: the CEA-Leti MAGALI chip. To validate the concept, several transmit and receive services of existing physical layer standards have been implemented. The additional costs of the virtual machine and the programming model were studied. Quantitative experimental evaluations of these additional costs have been realized and optimization techniques have been proposed
Moy, Christophe. "Evolution de la conception radio : de la radio logicielle à la radio intelligente." Habilitation à diriger des recherches, Université Rennes 1, 2008. http://tel.archives-ouvertes.fr/tel-00354493.
Full textBadran, Tamer. "Balayage de spectre utilisant les récepteurs radio logicielle." Electronic Thesis or Diss., Sorbonne université, 2020. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2020SORUS264.pdf.
Full textSpectrum sensing applications cover wide variety, such as efficient utilization of frequency spectrum, and in medical applications. The conventional architecture used by all the previous publications for spectrum sensing receiver is based on baseband ADC, hence it has high power consumption, higher complexity, and suffers from circuit mismatches and nonlinearity. In this work, we propose using an RF receiver based on bandpass delta-sigma ADC. It is much more convenient to have a tunable BP ΔΣ ADC to simplify the spectrum sweeping task. The previously reported tunable BP ΔΣ ADC’s are implementing tunability in a complex manner. We present an efficient implementation of tunable BP ΔΣ ADC with fixed ratio between the sampling frequency and center frequency. That fixed ratio further simplifies the implementation of the down conversion mixer and decimation filter which serve as the digital backend of the receiver. A spectrum sensing receiver, based on the power-efficient RF front end architecture proposed in this thesis, is also proposed. The proposed complete receiver does not suffer from I/Q imbalance that highly affect the spectrum sensing performance. Simulation results to show the circuit nonlinearity impact on the performance are presented. A circuit implementation of a digital backend of the proposed system is presented. This implementation comprises an efficient down conversion mixer, decimation filter, custom FFT block, and energy detection module. The implementation was validated on Altera FPGA using the on-chip logic analyzer via the SignalTab tool.Studies to show the impact of I/Q imbalance on spectrum sensing performance were previously published. Nevertheless, those publications presented only either analytical or simulation results. In this work, we present the first hardware measurement of the I/Q imbalance on spectrum sensing performance using a commercial SDR transceiver platform.In the medical field, we also present for the first time a study of the effect of RF-EMF exposure on neonates by performing a simultaneous acquisition of RF signals along with recording the physiological parameters of neonates. Using R-Studio, the stationarity of the signals to be correlated was checked, a transformation was performed on the non-stationary signals. Finally, cross correlation between the acquired RF signal (average of the whole spectrum or in a specific band) and each of the recorded physiological parameters did not show an observable impact of RF-EMF exposure on neonates
Tchidjo, Moyo Noël. "Architecture logicielle et méthodologie de conception embarquée sous contraintes temps réel pour la radio logicielle." Phd thesis, Université Rennes 1, 2011. http://tel.archives-ouvertes.fr/tel-00603708.
Full textTchidjo, Moyo Noël Bertrand. "Architecture logicielle et méthodologie de conception embarquée sous contraintes temps réel pour la radio logicielle." Rennes 1, 2011. https://tel.archives-ouvertes.fr/tel-00603708.
Full textThis study addresses the problem of real-time scheduling of software components executing in a digital signal processor in a software radio context. It aims at providing new tooling for software radio design. Real-time scheduling analysis of flexible signal processing applications executing in a processor is currently done manually, using ad hoc methods, and taking significant margins. Given the foreseen increase of software components of the physical layer executing simultaneously on a processor in future software radios, these methods for scheduling analysis will be error-prone, time consuming and will often fail to find a feasible schedule even when one exists. For that purpose, this thesis defines a new task model which represents more precisely the behaviour of the tasks in certain software radio context: the non-cylic GMF (Generalized Multi-Frame) model. For this model, we present a formula to compute response time of tasks, as well as a new sufficient feasibility test for tasks executing in a processor according to the “Earliest Deadline First” scheduling policy. We also provide for this task model an efficient algorithm, for exact feasibility determination. We present in this thesis a new MDE (Model Driven Engineering) design methodology, to specify the parameters which make possible a real-time scheduling analysis of software components executing in a processor. This thesis proposes methods to compute real-time constraints in a software radio. It presents the elements of the MARTE standard to be used, to note the constraints in the model as well as model transformation rules to obtain a suitable model for real-time scheduling analysis. This thesis presents an approach, implemented as a simulation tool, to realize real-time scheduling analysis of tasks implementing flexible signal processing algorithms in a processor and scheduled according to a hybrid scheduling policy. This tool is integrated into the proposed MDE design methodology
Cassagne, Adrien. "Méthodes d’optimisation et de parallélisation pour la radio logicielle." Thesis, Bordeaux, 2020. http://www.theses.fr/2020BORD0231.
Full textA software-defined radio is a radio communication system where components traditionally implemented in hardware are instead implemented by means of software. With the growing number of complex digital communication standards and the general purpose processors increasing power, it becomes interesting to trade the energy efficiency of the dedicated architectures for the flexibility and the reduced time to market on general purpose processors.Even if the resulting implementation of a signal processing is made on an application-specific integrated circuit, the software version of this processing is necessary to evaluate and verify the correct properties of the functionality. This is generally the role of the simulation. Simulations are often expensive in terms of computational time. To evaluate the global performance of a communication system can require from few days to few weeks.In this context, this thesis proposes to study the most time consuming algorithms in today's digital communication chains. These algorithms often are the channel decoders located on the receivers. The role of the channel coding is to improve the error resilience of the system. Indeed, errors can occur at the channel level during the transmission between the transmitter and the receiver. Three main channel coding families are then presented: the LDPC codes, the polar codes and the turbo codes. These three code families are used in most of the current digital communication standards like the Wi-Fi, the Ethernet, the 3G, 4G and 5G mobile networks, the digital television, etc. The resulting decoders offer the best compromise between error resistance and decoding speed known to date. Each of these families comes with specific decoding algorithms. One of the main challenge of this thesis is to propose optimized software implementations for each of them. Specific efficient implementations are proposed as well as more general optimization strategies. The idea is to extract the generic optimization strategies from a representative subset of decoders.The last part of the thesis focuses on the implementation of a complete digital communication system in software. Thanks to the efficient decoding implementations proposed before, a full transceiver, compatible with the DVB-S2 standard, is implemented. This standard is typically used for broadcasting multimedia contents via satellite. To this purpose, an embedded domain specific language targeting the software-defined radio is introduced. The main objective of this language is to take advantage of the parallel architecture of the current general purpose processors. The results show that the system achieves sufficient throughputs to be deployed in real-world conditions.These contributions have been made in a dynamic of openness, sharing and reusability, it results in an open source library named AFF3CT for A Fast Forward Error Correction Toolbox. Thus, all the results proposed in this thesis can easily be reproduced and extended. This philosophy is detailed in a specific chapter of the thesis manuscript
Delahaye, Jean-Philippe. "Plate-forme hétérogène reconfigurable : application à la radio logicielle." Rennes 1, 2007. http://www.theses.fr/2007REN1S181.
Full textThe Software Defined Radio (SDR) techniques aim at offering an access to a broad choice of radio communications standards on a flexible hardware (HW) architecture which is necessary in order to answer the diversity of the processing to carry out. The digital communications techniques involve heterogeneous resources needs. The reconfigurability of a heterogeneous HW platform is thus a key features to a successful appearance of SDR systems. The reconfigurability of a SDR system must meet the needs for adaptation of the processing functions to answer the requirements of the contexts switching. Our work is based on the analysis of the baseband processing in the transmitting chains of the 3 standards UMTS, GSM and 802. 11g. We propose an analysis of factorization of the multistandard baseband processing in order to reduce the number of contexts to be managed and we determine the needs for flexibility of SDR applications. In this context, the configuration management of HW platforms clearly appears as the key feature of a SDR system. We propose a Hierarchical and Distributed Configuration Management (“HDCM”) approach in order to meet the needs of managing various types of flexibility of dataflow oriented applications mapped on heterogeneous HW. The implementation of applications on reconfigurable heterogeneous platforms and in particular on configurable logic devices, requires the uses of new design methodologies in order to extract the potential reconfigurability of these reconfigurables devices. We bring in this work various design methodologies that aim at designing partially and dynamically reconfigurable systems on chip and on FPGA
Muller, Jonathan. "Emetteur à 60 GHz avec des possibilités radio logicielle." Thesis, Lille 1, 2011. http://www.theses.fr/2011LIL10100/document.
Full textRecent deep sub-micron CMOS technologies have allowed the development of digital baseband circuits for wireless communications. 60 GHz radio has emerged as one of the most promising candidates for high-data-rate (10 Gb/sec), short-distance (1 to 10 m), wireless telecommunication systems. State-of-the-art 60 GHz radio use exclusively analog transceivers. Recent deep sub-micron CMOS technologies have allowed the development of highly digital transceivers for wireless communications in the lower GHz range. In this work, a digital transmitter architecture targeted at 60GHz c communications has been studied. It is based on the combination of an interpolator and a DRFC (digital-to-RF converter), structure which combines a DAC and mixer in order to realize a direct conversion of the digital data stream to the RF frequency. The 60 GHz wireless standard IEEE 802.15.3c has been taken as a reference to study the proposed transmitter. The digital data stream at the baseband output (sampled at 2.5 GS/s) needs to be oversampled and resulting replicas of the signal at multiples of the initial sampling frequency have to be filtered. Images at multiples of the initial sampling frequency are attenuated with an interpolator FIR filter working at 10 GS/s. A prototype of the 10GS/s interpolator has been implemented in a 65nm CMOS technology to prove the feasibility of the concept. The filter uses powers of two coefficients and dynamic logic to reach the required sampling rate. The fabricated prototype transmitter IC demonstrates full functionality up to a 9.6 GHz and consumes 408mA (571mW) with a 1.4V supply voltage. The core area is 650 x 170 um2
Tian, Guangye. "Flot de conception système sur puce pour radio logicielle." Phd thesis, Université Paris Sud - Paris XI, 2011. http://tel.archives-ouvertes.fr/tel-00605989.
Full textTian, Guangye. "Flot de conception système sur puce pour radio logicielle." Electronic Thesis or Diss., Paris 11, 2011. http://www.theses.fr/2011PA112099.
Full textThe Software Defined Radio (SDR) is a reconfigurable radio whose functionality is controlled by software, which greatly enhances the reusability and flexibility of waveform applications. The system update is also made easily achievable through software update instead of hardware replacement. The Software Communication Architecture (SCA), on the other hand, is an open architecture framework which specifies an Operating Environment (OE) in which waveform applications are executed. A SCA compliant SDR greatly improves the portability, reusability and interoperability of waveforms applications between different SDR implementations.The multiprocessor system on chip (MPSoC) consisting of large, heterogeneous sets of embedded processors, reconfiguration hardware and network-on-chip (NoC) interconnection is emerging as a potential solution for the continued increase in the data processing bandwidth, as well as expenses for the manufacturing and design of nanoscale system-on-chip (SoC) in the face of continued time-to-market pressures.We studied the challenges of efficiently deploying a SCA compliant platform on an MPSoC. We conclude that for realizing efficiently an SDR system with high data bandwidth requirement, a design flow with systematic design space exploration and optimization, and an efficient programming model are necessary. We propose a hybrid programming model combining distributed client/server model and parallel shared memory model. A design flow is proposed which also integrates a NoC topology synthesis engine for applications that are to be accelerated with parallel programming and multiple processing elements (PEs). We prototyped an integrated SW/HW development environment in which a CORBA based integrated distributed system is developed which depends on the network-on-chip for protocol/packet routing, and software components are deployed with unified interface despite the underlying heterogeneous architecture and os; while the hardware components (processors, IPs, etc) are integrated through interface conforming to the Open Core Protocol (OCP)
Grand, Michael. "Conception d'un crypto-système reconfigurable pour la radio logicielle sécurisée." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2011. http://tel.archives-ouvertes.fr/tel-00670151.
Full textGrand, Michaël. "Conception d’un crypto-système reconfigurable pour la radio logicielle sécurisée." Thesis, Bordeaux 1, 2011. http://www.theses.fr/2011BOR14388/document.
Full textThe research detailed in this document deal with the design and implementation of a hardware integrated circuit intended to be used as a cryptographic sub-system in secure software defined radios.Since the early 90’s, radio systems have gradually evolved from traditional radio to software defined radio. Improvement of the software defined radio has enabled the integration of an increasing number of communication standards on a single radio device. The designer of a software defined radio faces many problems that can be summarized by the following question: How to implement a maximum of communication standards into a single radio device? Specifically, this work focuses on the implementation of cryptographic standards aimed to protect radio communications.Ideally, the solution to this problem is based exclusively on the use of digital processors. However, cryptographic algorithms usually require a large amount of computing power which makes their software implementation inefficient. Therefore, a secure software defined radio needs to incorporate dedicated hardware even if this usage is conflicting with the property of flexibility specific to software defined radios.Yet, in recent years, the improvement of FPGA circuits has changed the deal. Indeed, the latest FPGAs embed a number of logic gates which is sufficient to meet the needs of the complex digital functions used by software defined radios. The possibility offered by FPGAs to be reconfigured in their entirety (or even partially for the last of them) makes them ideal candidates for implementation of hardware components which have to be flexible and scalable over time.Following these observations, research was conducted within the Conception des Systèmes Numériques team of the IMS laboratory. These works led first to the publication of an architecture of cryptographic subsystem compliant with the security supplement of the Software Communication Architecture. Then, they continued with the design and implementation of a partially reconfigurable multi-core cryptoprocessor intended to be used in the latest FPGAs
Garon, Mickaël. "Modélisation comportementale d'éléments mixtes d'une chaîne de traitement radio-fréquence dans un contexte radio-logicielle." Nantes, 2005. http://www.theses.fr/2005NANT2138.
Full textThe future portable devices are based on software-radio architectures which use mainly digital signal processing. In these architectures the analog circuits interact with the digital components. In this work, we propose an approach allowing the joint modelling of radio frequency functions with digital blocks. These models are written in VHDL AMS. The consumption aspect is fundamental for this type of applications. We propose also models for consumption estimation. Using this approach, we show that it is possible to simulate and estimate the electrical consumption of a complex circuit. This is demonstrated using a linearized radio-frequency power amplifier
Boumaaz, Najib. "Étude d'opérateurs de traitement de signal appliquant l'échantillonnage aléatoire pour la radio logicielle." Nantes, 2009. http://www.theses.fr/2009NANT2028.
Full textThe presented work is the result of a cross between two recent fields: Software Radio (SR) and Random Sampling. The SR concept has emerged with the idea to allowing the realization of multi-mode and multi-standards infrastructure and terminals. At present, we consider the software defined radio architectures (SDR) which are more realistic. The development of systems operating with random sampling makes it possible to overcome the aliasing constraints encountered in the uniform sampling case. Indeed, these aliases are a significant obstacle for the choice and the sizing of the signal processing operators and their parameters. In order to optimize an SDR architecture, we tried to propose new and simple DFE structures applying random sampling. These structures should be simple, efficient and suitable for this kind of problems. In this thesis, we attempt to develop some signal processing operators predestined to be implemented in the DFE of an SDR architecture. We are particularly interested to multiband signal reconstruction algorithms and to channel filtering. We have studied some signal reconstruction methods treating finite sampling sequences. We have proposed a variety of DFE structures based on reconstruction signal algorithms or on adapted CIC filters. To complete the theoretical studies and simulations, we have analyzed software and hardware implementation aspects by developing some DFE operators on DSP card and FPGA
Kaiser, Patricia. "Théorie des graphes pour l'optimisation d'un équipement radio logicielle multi-standards." Phd thesis, Supélec, 2012. http://tel.archives-ouvertes.fr/tel-00828443.
Full textBracamontes, Del Toro Humberto. "Plate-forme radio-logicielle pour le traitement multi-capteurs en radiocommunications." Brest, 2006. http://www.theses.fr/2006BRES2009.
Full textThis work is dedicated to the digital signal processing of signals of communications observed on an antenna array and proposes algorithmic treatments to take into account the distortions introduced by the propagation and the receivers, as well as a realization of their implementation on a software-radio platform. The document of thesis is organized in four chapters. The first chapter provides a general presentation of the antenna arrays for the communications radio-mobiles with a special attention to the effects of the mutual coupling between array elements. The second chapter is devoted to a bibliographical study on the techniques of multi-sensors equalization. The third chapter tackles the problems of mutual coupling between antennas, automatic gain control, interference rejection and propagation channels characterization, by proposing new algorithmic solutions. The final chapter relates to the construction of a software-radio test-bed. This test-bed made it possible to validate the theoretical results obtained within the framework of a real system by showing the correct operation of the algorithms developed for the reception of digital communications et the channel characterization
Soëte, Thomas. "Couche logicielle bas niveau efficace pour interface radio à faisceaux agiles." Thesis, Lille 1, 2010. http://www.theses.fr/2010LIL10179/document.
Full textThe work presented in this paper are placed in the context of wireless networks without infrastructure (Ad Hoc) involving the use of sector antennas in a 60 GHz radio channel. The antenna consists of several simple antennas; each intended for a particular sector and may be mechanically switched to activate a single sector. It is thus possible to choose the area of transmitting or receiving data. This type of antenna nevertheless suffers from a problem with this mechanical switching: it cannot be done instantly. At each change of sector, a small amount of time is lost, which reduces the efficiency. This problem is particularly important when the switching time is around the time needed to send a packet: more than half of the bandwidth can be wasted. The state of the art solutions for supporting sector antennas generally do not take into account this switching time and therefore are not adapted to this problem. The thesis is that by taking into account the switching time, it is possible to produce an efficient and adapted protocol stack to this type of antennas. We therefore propose a new optimized protocol stack including the two lower layers of the OSI model. It then remains interoperable with other systems
Rouxel, Samuel. "Modélisation et Caractérisation d'une Plate-Forme SOC Hétérogène : Application à la Radio Logicielle." Phd thesis, Université de Bretagne Sud, 2006. http://tel.archives-ouvertes.fr/tel-00124433.
Full textUne chaîne UMTS a permis la validation de l'outil réalisé, en confrontant les résultats estimés de l'outil, à ceux mesurés sur une plate-forme temps réel hétérogène (multi-DSP, multi-FPGA). Une partie du travail s'est concentré sur l'identification des composants utiles à la conception des systèmes SoC, et de leurs caractéristiques, en adéquation avec le niveau d'abstraction considéré. Une autre partie des travaux a porté sur la définition des modèles UML, et donc du profil, qui définissent la sémantique des différents composants identifiés en fonction de la configuration (PIM, PSM), ainsi que leurs relations. Une réflexion a été nécessaire afin d'élaborer les diverses règles de vérification et modèles d'exécution qui permettent d'informer le concepteur de ses erreurs et de la faisabilité du système modélisé. Un modèle de système d'exploitation a également été inclus, enrichissant la liste des éléments (composants) déjà définis et démontrant l'extensibilité du profil.
Dardaillon, Mickaël. "Compilation d'applications flot de données paramétriques pour MPSoC dédiés à la radio logicielle." Thesis, Lyon, INSA, 2014. http://www.theses.fr/2014ISAL0102/document.
Full textThe emergence of software-defined radio follows the rapidly evolving telecommunication domain. The requirements in both performance and dynamicity has engendered software- defined-radio-dedicated MPSoCs. Specialization of these MPSoCs make them difficult to program and verify. Dataflow models of computation have been suggested as a way to mi- tigate this complexity. Moreover, the need for flexible yet verifiable models has led to the development of new parametric dataflow models. In this thesis, I study the compilation of parametric dataflow applications targeting software-defined-radio platforms. After a hardware and software state of the art in this field, I propose a new refinement of dataflow scheduling, and outline its application to buffer size’s verification. Then, I introduce a new high-level format to define dataflow actors and graph, with the associated compilation flow. I apply these concepts to optimised code generation for the Magali software-defined-radio platform. Compilation of parts of the LTE protocol are used to evaluate the performances of the proposed compilation flow
Rouxel, Samuel. "Modélisation et caractérisation de plates-formes SoC hétérogènes : application à la radio logicielle." Lorient, 2006. http://www.theses.fr/2006LORIS077.
Full textThe work of this PhD has been carried out within the framework of the A3S project and relies on component aspects integrated within a SoC platform design methodology, which is based on the UML language. This methodology proposes a high-level design framework based on the A3S UML profile developed to provide real-time embedded system semantic especially in SDR domain. An MDA approach has been considered to deal with different abstraction levels when specifying systems. First part of the work focused on identifying the component required designing a SoC system, and their characteristics depending on the component abstraction levels. Several types of component (software and hardware) whose characteristics depend on their modelling (PIM or PSM models) have been considered. Second part of the work focused on the definition of UML metamodels, which are grouped to define the A3S UML profile that establish the semantic of identified components depending on their modelling and their relations. We have defined extensive verification rules and applied a model of computation to inform designers about errors that have been done and to ensure the feasibility of their systems. Finally an operating system model has been included to demonstrate the scalability and the extension mechanisms of the UML language and profile which improve the list of components that have been already integrated within our framework. An UMTS application has validated our approach by comparing the estimated results computed by the tool with measured results obtained on a heterogeneous real-time platform (with several DSP and FPGA)
Semlali, Hayat. "Développement de nouvelles structures et d'algorithmes appliquant l’échantillonnage aléatoire pour des systèmes de type radio logicielle et radio cognitive." Nantes, 2015. http://archive.bu.univ-nantes.fr/pollux/show.action?id=50ca55df-b56d-4c7c-817c-8976af7c725b.
Full textIn this work we apply random sampling in the context of software radio and cognitive radio. The use of random sampling makes it possible to overcome the aliasing constraint imposed by the uniform sampling case. The first part is dedicated to the key element of software radio systems which is the digital front-end. We present different methods for randomly sampled signals reconstruction and for channel filtering. We are interested by iterative methods due to their flexibility and convergence speed. Later we propose a new structure of the digital front-end based on the ADPW-GC iterative method for channel selection by applying random sampling in a software radio context. The performance of this method is analyzed in terms of complexity, quality of reconstructed signal and robustness and compared with classical structures. The second part, deals with the spectrum sensing which is one of the main functions of cognitive radio. The performance of these structures are evaluated and compared to the case of uniform sampling. After the theoretical and simulation studies, some applications are given in the context of software defined radio and cognitive radio based on real FM radio signals
Wu, Xiguang. "Hierarchical reconfiguration management for heterogeneous cognitive radio equipments." Thesis, CentraleSupélec, 2016. http://www.theses.fr/2016SUPL0002/document.
Full textAs the digital communication systems evolve from GSM and now toward 5G, the supported standards are also growing. The desired communication equipments are required to support different standards in a single device at the same time. And more and more wireless Internet services have been being provided resulting in the explosive growth in data traffic, which increase the energy consumption of the communication devices thus leads to significant impact on global CO2 emission. More and more researches have focused on the energy efficiency of wireless communication. Cognitive Radio (CR) has been considered as an enabling technology for green radio communications due to its ability to adapt its behavior to the changing environment. In order to efficiently manage the sensing information and the reconfiguration of a cognitive equipment, it is essential, first of all, to gather the necessary metrics so as to provide enough information about the operating condition thus helping decision making. Then, on the basis of the metrics obtained, an optimal decision can be made and is followed by a reconfiguration action, whose aim is to minimize the power dissipation while not compromising on performance. Therefore, a management architecture is necessary to be added into the cognitive equipment acting as a glue to realize the CR capabilities. We introduce a management architecture, namely Hierarchical and Distributed Cognitive Radio Architecture Management (HDCRAM), which has been proposed for CR management by our team. This work focuses on the implementation of HDCRAM on heterogeneous platforms. One of the objectives is to improve the energy efficiency by the management of HDCRAM. And an example of a simplified OFDM system is used to explain how HDCRAM works to efficiently manage the system to adapt to the changing environment
Lecomte, Stéphane. "Méthodologie de conception de haut niveau orientée modèles pour les équipements de radio logicielle." Phd thesis, Université Rennes 1, 2011. http://tel.archives-ouvertes.fr/tel-00659535.
Full textBarrandon, Ludovic. "Synthèse architecturale analogique / numérique appliquée aux systèmes sur puce dans un contexte radio logicielle." Phd thesis, Université Rennes 1, 2005. http://tel.archives-ouvertes.fr/tel-00012094.
Full textDans ce contexte, le thème émergent de radio logicielle a pour rôle de répondre à une diversité de fonctionnalités et de standards de télécommunication sans fil à l'aide d'une interface matérielle unique.
L'objet de cette thèse est d'élaborer des méthodologies et des outils contribuant au dimensionnement et à la synthèse systématique d'un module analogique/numérique dédié à des applications radio logicielle.
Les aspects modélisation et prototypage d'une tête de réception mixte constituent les principales contributions de ce travail. Un exemple de dimensionnement d'une tête de réception mixte répondant aux standards GSM et UMTS est développé. La simulation globale de ce système ainsi que son implémentation matérielle sont proposées.
Lévy-Bencheton, Cédric. "Étude de relais multi-mode sous contrainte d'énergie dans un contexte de radio logicielle." Phd thesis, INSA de Lyon, 2011. http://tel.archives-ouvertes.fr/tel-00679722.
Full textAshry, Ahmed. "Récepteur RF pour la radio-logicielle basé sur un convertisseur analogique-numérique sigma-delta passe-bande." Paris 6, 2012. http://www.theses.fr/2012PA066307.
Full textHappi, Tietche Brunel. "Proposition d'architectures radio logicielles fpga pour démoduler simultanément et intégralement les bandes radios commerciales, en vue d'une indexation audio." Thesis, Paris 6, 2014. http://www.theses.fr/2014PA066052/document.
Full textThe expansion of the radio and the development of new standards enrich the diversity and the amount of data carried by the broadcast radio waves. It becomes wise to develop a search engine that has the capacity to make these accessible as do the search engines on the internet like Google. Such an engine can offer many possibilities. In that vein, the SurfOnHertz project, which was launched in 2010 and ended in 2013, aimed to develop a browser that is capable of indexing audio streams of all radio stations. This indexing would result, among others, in the detection of keywords in the audio streams, the detection of commercials, the classification of musical genres. The browser once developed would become the first search engine of its kind to address the broadcast content. Taking up such a challenge requires to have a device to capture all the stations being broadcasted in the geographical area concerned, demodulate them and transmit the audio contents to the indexing engine. Thus, the work of this thesis aim to provide digital architectures carried on a SDR platform for extracting, demodulating, and making available the audio content of each broadcast stations in the geographic area of the receiver. Before the large number of radio standards which exist today, the thesis focuses FM and DRM30 standards. However the proposed methodologies are extensible to other standards. The bulk of the work is FPGA-based. The choice of this type of component is justified by the great opportunities it offers in terms of parallelism of treatments, mastery of available resources, and embeddability. The development of algorithms was done for the sake of minimizing the amount of the used calculations blocks. Moreover, many implementations have been performed on a Stratix II technology which has limited resources compared to those of the FPGAs available today on the market. This attests to the viability of the presented algorithms. The proposed algorithms thus operate simultaneous extraction of all radio channels when the stations can only occupy uniformly spaced locations like FM in Western Europe, and also for standards of which the distribution of stations in the spectrum seems rather random as the DRM30. Another part of the discussion focuses on the means of simultaneously demodulating it
Rivet, François. "Contribution à l’étude et à la réalisation d’un frontal radiofréquence analogique en temps discrets pour la radio-logicielle intégrale." Thesis, Bordeaux 1, 2009. http://www.theses.fr/2009BOR13811/document.
Full textMany technological bottlenecks prevent from realizing a Software Radio (SR) mobile terminal. The old way of building radio architectures is over due to the numerous communication standards a single handeld terminal have to address nowadays. This thesis exposes a disruptive SR receiver: a Sampled Analog Signal Processor (SASP) is designed and brought into play to perform downconversion and channel presort. It processes analog voltage samples in order to recover in baseband any RF signal emitted from 0 to 5GHz. An analog Fast Fourier Transform achieves both frequency shifting and ?ltering. A prototype using 65nm CMOS technology from STMicroelectronics is here presented and measured
Lecomte, Stéphane. "Méthodologie de conception basée sur les modèles de haut niveau pour les systèmes de radio logicielle." Rennes 1, 2011. http://www.theses.fr/2011REN1S142.
Full textIn this thesis, we suggest a hardware/software co-design methodology for software radio systems, and more generally for flexible embedded electronics systems, allowing to answer the new design challenges it imposes and to improve the productivity. Our co-design methodology is based on a high-level UML/MARTE (extension of UML dedicated to the hardware modeling) modeling approach. Based on model driven architecture (derived from model driven engineering), our methodology allows to start at a highlevel modeling level and go down to the hardware implementation (generation of VHDL code) by successive rules of transformation and iterative refinements of the models. For that, we defined the middle level of modeling, e. G. Execution Modeling Level, which allows focusing on hardware/software partitioning and focusing on the exploration of architecture to design the hardware platform. To complete the generation of the hardware design language, associated with this methodology, we recommend to couple a co-design methodology based on high-level models with the behavioral synthesis concept. This approach is illustrated with a MIMO decoder example. Finally, in the software radio context, we suggest an extension of the methodology in order to take into account the flexibility of the embedded systems. For that, we include into our methodology an architecture defined at Supélec to manage the reconfiguration. An execution of high-level models on a real radio platform allowed to validate our approach
Godard, Loïg. "Modèle de gestion hiérarchique distribuée pour la reconfiguration et la prise de décision dans les équipements de radio cognitive." Rennes 1, 2008. https://tel.archives-ouvertes.fr/tel-00355352.
Full textThis work focuses on the implementation of a management architecture for cognitive radio equipment for applications in the field of radiocommunications. The architecture is named HDCRAM (Hierarchical and Distributed Cognitive Radio Architecture Management). HDCRAM is hierarchically distributed in the equipment to take into account heterogeneity of execution platforms. Thanks to a precise management for both reconfiguration and decision-making leading to a reconfiguration of all or part of the system. Through the use of UML language, for high level of abstraction modeling, we define a platform independent model of HDCRAM which offers an extended opportunity in terms of reusability and modularity. The choice to use an executable metamodeling language as Kermeta for HDCRAM allows describing both structural and behavioral part of our architecture and gives the opportunity to make functional simulation
Alaus, Laurent. "Architecture reconfigurable pour un équipement radio multistandard." Rennes 1, 2010. https://tel.archives-ouvertes.fr/tel-00538631.
Full textIn the present day, the profusion of wireless communication standards leads to complex terminals able to manage a wide range of standards, which calls for multistandard terminals. In order to meet the requirement of such terminals, we propose a new Parameterization strategy to design a Reconfigurable Terminal. With this method, - The Common Operator Technique - Parameterization focuses on smaller building blocks that can be reused across many of the functions required by each standard. The Method leads up to higher scalability and reconfigurability at the expense of an extra scheduling to handle with. As a consequence, we propose a new architecture in Common Operator Bank (COB), which limits the scheduling issue though optimizing the hardware complexity. Three families of Common Operators are introduced, (LFSR, Treillis/Butterfflies, CORDIC). The first realizations obtained in COB are based on LFSR and CORDIC operators. Centered on a tri-standard terminal (3GPP LTE, IEEE802. 11g and 802. 16e), the implementation on a FPGA, Altera/Cyclone II results in a Logic Cells complexity decrease of 40%
Campo, Clément. "Conception d'un système de contrôle d’antennes basé sur la radio logicielle pour réception et émission améliorées de données." Thesis, Poitiers, 2020. http://www.theses.fr/2020POIT2270.
Full textAs a wireless way to exchange information, electromagnetic waves are more omnipresent in our environment than ever. The ever increasing number of connected devices calls for a better use of the available spectrum. In the particular case of telecommunications with a projectile, which is the case of study in this thesis, communications must also be discreet and reliable, even in a hostile environment. In the general framework of telecommunications as well as in this particular field of application, antenna arrays and the dynamic spatial filtering they allow offer multiple advantages for present and future challenges. Antenna array steering requires phase coherent and phase aligned functioning from the control electronics. In a previous PhD thesis, an analog system allowed beam steering of the array embedded in a projectile towards a base station at all times during projectile flight. However, this system was only able to switch between 16 different configurations for the embedded array radiation pattern and was functional only around a 5.2 GHz working frequency. On the other hand, Software Defined Radio (SDR) uses wide-band programmable components thanks to which received or generated signals can be processed in digital baseband. Therefore, using SDR would allow for a more precise control of the radiation pattern over large frequency bandwidths. Despite these promises, this technology remains rarely used for phase coherent applications. This work hence studies possibilities provided by commercial SDR for phase coherent applications. Telecommunications with a projectile, which also require phase alignment, constitute the considered application. Linear and planar antenna arrays are studied. An antenna weighting system of 4 channels for both data reception and transmission is assembled using commercial SDR. Distinct solutions are developed for data reception or transmission in order to automate phase shift compensation between channels. Several antenna weighting and Direction of Arrival (DOA) algorithms are implemented in C++. As the available equipment does not allow the automated measurement of the radiation pattern of antenna arrays when steered by SDR, a dedicated experimental setup is proposed. The developed system performance is then quantified in an anechoic environment for arrays of different geometries, and working frequencies from 2.3 to 5.2 GHz. Depending on the measured array, the main lobe or null can be steered within 60 to more than 100° along 1 or 2 dimensions. The implemented algorithms are also used to develop a projectile tracking station based on DOA estimation of the transmitter embedded in the projectile. The resulting station is tested with several projectiles flying at a speed close to Mach 1. The projectiles are electronically followed by the system as expected from simulations. The signal to noise ratio of the station combined signals is superior to that of a single element signal by more than 5 dB, and transmitted flight data is correctly decoded
Veyrac, Yoan. "Contribution à l'étude et à la réalisation d'un générateur de signaux radiofréquences analogiques pour la radio logicielle intégrale." Thesis, Bordeaux, 2015. http://www.theses.fr/2015BORD0444/document.
Full textThe increasing density of wireless devices and the associated communication flowssharing the same air interface will require a smart and agile use of frequency resources. Thisthesis proposes a flexible, low cost and low power disruptive transmitter architecture. It usesa differentiating coding scheme which leverages a mathematical and technological reduction ofthe energy cost of information conversion. The design of a DAC suited to this architecture isdeveloped and its performances are assessed toward RF signal generation. The measurementsof a demonstrator designed in 65 nm CMOS technology bring a proof of concept
Gul, Sufi Tabassum. "Optimization of multi-standards software defined radio equipments : a common operator's approach." Rennes 1, 2009. http://www.theses.fr/2009REN1S074.
Full textLa technique de paramétrisation est très prometteuse pour la conception radio logicielle. La radio logicielle consiste à concevoir des systèmes multi-standards qui tirent bénéfice des possibilités de programmation ou de reconfiguration offertes par les composants de traitement la constituant. Cette thèse étudie la technique de paramétrisation par opérateurs communs. Les opérateurs communs sont des unités de traitements communes à plusieurs opérations qu’effectue un équipement de radio communication, quelle que soit la couche du modèle OSI à laquelle elles appartiennent. La méthode proposée repose sur une approche théorique afin de résoudre le problème de conception d’un équipement multi-standards. Elle consiste en une optimisation d’un hypergraphe. La conception de l’équipement est représentée par des opérateurs à différents niveaux de granularité dans un graphe acyclique orienté. Le niveau le plus élevé représente une approche de conception d’équipements multi-standards de type Velcro. Plus les opérateurs sont bas dans le graphe, plus leur coût est faible en termes de complexité, mais plus il faut faire appel de fois à eux pour effectuer des opérations de différentes sortes. Nous décrivons ensuite en tant qu’exemples des conception basées sur les opérateurs DMFFT (dual mode FFT), LFSR (linear feedback shift register) et le cas du FRMFB (frequency response masking filter bank). Les solutions basées sur les opérateurs communs proposées dans cette thèse contribuent à optimiser la conception des futurs équipements multi-standards de radio logicielle qui devront supporter de nombreux standards de communication sans fil
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.
Full textRivet, Francois. "Contribution à l'étude et à la réalisation d'un frontal radiofréquence analogique en temps discrets pour la radio-logicielle intégrale." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2009. http://tel.archives-ouvertes.fr/tel-00412242.
Full textGailliard, Grégory. "Vers une approche commune pour le logiciel et le matériel de spécification et d’implémentation des systèmes embarqués temps-réels distribués, basée sur les intergiciels et les composants orientés objet : Application aux modèles de composants Software Communications Architecture (SCA) et Lightweight Corba Component Model (LwCCM) pour les systèmes de radio logicielle." Cergy-Pontoise, 2010. http://biblioweb.u-cergy.fr/theses/2010CERG0518.pdf.
Full textThis thesis deals with the hardware application of the software concepts of middleware and software architecture based on components, containers and connectors within Field-Programmable Gate Arrays (FPGAs). The target application domain is Software Defined Radio (SDR) compliant with the Software Communications Architecture (SCA). With the SCA, software radio applications are broken into functional waveform components to be deployed on heterogeneous and distributed hardware/software radio platforms. These components provide and require abstract software interfaces described using operation signatures in the Unified Modeling Language (UML) and/or the Interface Definition Language (IDL) of the Common Object Request Broker Architecture (Corba) middleware, both standardized by an international software industry consortium called Object Management Group (OMG). The portability and reusability needs of these business components require that their abstract interfaces defined at a system level are independent of a software or hardware implementation and can be indifferently translated into a software programming language like C/C++, a system language like SystemC at transaction level (Transaction Level Modeling - TLM), or a hardware description language like VHDL or SystemC at Register Transfer Level (RTL). The interoperability need of SDR components requires transparent communications regardless of their hardware/software implementation and their distribution. These first needs were addressed by formalizing mapping rules between abstract components in OMG IDL3 or UML2, signalbased hardware components described in VHDL or SystemC RTL, and system components in SystemC TLM. The second requirement was addressed by prototyping a hardware middleware using transparently memory mapping and two message protocols: Corba General Inter-Object Request Broker Protocol (GIOP) and SCA Modem Hardware Abstraction Layer (MHAL)
Schmidt-Knorreck, Carina. "Architectures radio-logicielles appliquées aux réseaux véhiculaires." Electronic Thesis or Diss., Paris, ENST, 2012. http://www.theses.fr/2012ENST0057.
Full textDealing with the requirements of reconfigurable radio architectures in the vehicular domain is a very challenging task. Solutions can be found in the context of Software Defined Radio (SDR). Under its umbrella, flexible hardware platforms that support a wide range of different wireless communication standards are designed. One of them is the OpenAirInterface ExpressMIMO platform that is developed by Eurecom and Télécom ParisTech. Main objectives of this thesis are to propose the first receiver chain prototype for ExpressMIMO, to assess the applicability of the platform for latency critical standards, to identify design bottlenecks and to propose and implement solutions to overcome the identified limitations. Standard of interest in this context is IEEE 802.11p which is required for the Car-to-Car communication. Our analysis reveals that the Front-End Processing (FEP) DSP engine is heavily charged and that the required configuration time outreaches the pure execution time for short vectors. To meet this challenge we introduce an Application Specific Instruction-Set Processor (ASIP) as the solution of choice when dealing with strong latency requirements. To complete the receiver chain we further present a first Preprocessor prototype which connects the external A/D and D/A converters with the remaining baseband engine. In this context we focus on a generic, flexible and hardware optimized Sample Rate Converter (SRC) that is operating on fractional ratios. As the combination of Car-to-Car and Car-to-Infrastructure communications within only device enables various new applications for future cars we finally investigate on a possible multimodal execution of 802.11p and DAB on the chosen target platform
Al, Ghouwayel Ali. "Contribution à l'étude de l'opérateur commun FFT dans le contexte de la Radio logicielle : application au codage de canal." Phd thesis, Université Rennes 1, 2008. http://tel.archives-ouvertes.fr/tel-00354490.
Full textDorie, Laurent. "Modélisation et évaluation de performances en vue de la conception conjointe des systèmes reconfigurables : application à la radio logicielle." Nantes, 2007. http://www.theses.fr/2007NANT2107.
Full textThe fast evolution of embedded system context leads to more and more complexity into electronic products that can support many ways of working and different standards. In these systems, the reconfiguration is a solution to face such evolution and also respect embedded constraints. This property points out that a system is able to modify its behaviour. Such property concerns just as well the application development as the technology design. New approaches and tools are needed to take into account this reconfiguration property. Thus, the goal of this thesis is to provide high abstraction level models in order to improve the co-design of reconfigurable systems. The first part of this thesis interested in reconfiguration mechanisms of radiocommunication systems. It led to the definition of modelling in order to describe the reconfigurable mechanisms of radio communication application. The second part of this thesis focused on the reconfigurable architectures. It led to a modelling able to describe the reconfigurable impact of heterogeneous multi-processor platforms on system behaviour and performances. The interest of these modelling is illustrated by a study which deals with a typical case of Software Radio
Ouedraogo, Ganda Stéphane. "Automatic synthesis of hardware accelerator from high-level specifications of physical layers for flexible radio." Thesis, Rennes 1, 2014. http://www.theses.fr/2014REN1S183/document.
Full textThe Internet of Things (IoT) aims at connecting billions of communicating devices through an internet-like network. To this aim, the access to these things is expected to be performed via wireless technologies without using any predefined infrastructures or standards. This technology requires defining and implementing smart nodes capable to adapt to different radio communication protocols. In this thesis, we have defined a design methodology/flow, for such smart nodes, starting from their high-level specification down to their implementation in FPGA fabrics. This flow aims at improving the programmability of the waveforms by leveraging some high-level specifications. Thus, it relies on the High-Level Synthesis (HLS) for rapid prototyping of the waveforms functional blocks as well as the dataflow model of computation. Its entry point is Domain-Specific Language which enables modeling a waveform while inserting some implementation constraints for reconfigurable architectures such as the FPGAs. The flow is featured with a compiler which purpose is to produce some synthesis scripts and generate some RTL source code. The final waveform consists of a datapath and a control unit implemented as a Hierarchical Finite State Machine (HFSM)
Maalej, Asma. "Apport de l'échantillonnage aléatoire à temps quantifié pour le traitement en bande de base dans un contexte radio logicielle restreinte." Thesis, Paris, ENST, 2012. http://www.theses.fr/2012ENST0022/document.
Full textThe work presented in this Ph.D. dissertation deals with the design of multistandard radio receivers that process signals with heterogeneous specifications. The originality of these research activities comes from the application of random sampling at the baseband stage of a software defined radio receiver. The purpose behind the choice of random sampling is to take advantage of its alias-free feature. The originality of this work is the analytic proof of the alias attenuation feature of the time quantized random sampling, the implementation version of the random sampling. A second contribution concerns also the analytic study of the simplest implementation version of the random sampling, the time quantized pseudo-random sampling (TQ-PRS). Theoretical formulas allow the estimation of the alias attenuation in terms of time quantization factor and oversampling ratio. Alias attenuation measurement permits to design the baseband stage of the proposed multistandard radio receiver architecture. The design concerns different configuration of the baseband stage according to the performances of the used analog-to-digital converters (ADC). The TQPRS allows decreasing the anti-aliasing filter order or the sampling frequency. The design of the baseband stage reveals a difference on the choice of the time quantization factor for each standard. The power consumption budget analysis demonstrates a power consumption gain of 30% regarding the power consumption of the analog baseband stage. This gain becomes 27.5% when the TQ-PRS clock and the digital canal selection stages are considered
Tran, Mai-Thanh. "Towards hardware synthesis of a flexible radio from a high-level language." Thesis, Rennes 1, 2018. http://www.theses.fr/2018REN1S072/document.
Full textSoftware defined radio (SDR) is a promising technology to tackle flexibility requirements of new generations of communication standards. It can be easily reprogrammed at a software level to implement different waveforms. When relying on a software-based technology such as microprocessors, this approach is clearly flexible and quite easy to design. However, it usually provides low computing capability and therefore low throughput performance. To tackle this issue, FPGA technology turns out to be a good alternative for implementing SDRs. Indeed, FPGAs have both high computing power and reconfiguration capacity. Thus, including FPGAs into the SDR concept may allow to support more waveforms with more strict requirements than a processor-based approach. However, main drawbacks of FPGA design are the level of the input description language that basically needs to be the hardware level, and, the reconfiguration time that may exceed run-time requirements if the complete FPGA is reconfigured. To overcome these issues, this PhD thesis proposes a design methodology that leverages both high-level synthesis tools and dynamic reconfiguration. The proposed methodology is a guideline to completely build a flexible radio for FPGA-based SDR, which can be reconfigured at run-time
Schmidt-Knorreck, Carina. "Architectures radio-logicielles appliquées aux réseaux véhiculaires." Thesis, Paris, ENST, 2012. http://www.theses.fr/2012ENST0057/document.
Full textDealing with the requirements of reconfigurable radio architectures in the vehicular domain is a very challenging task. Solutions can be found in the context of Software Defined Radio (SDR). Under its umbrella, flexible hardware platforms that support a wide range of different wireless communication standards are designed. One of them is the OpenAirInterface ExpressMIMO platform that is developed by Eurecom and Télécom ParisTech. Main objectives of this thesis are to propose the first receiver chain prototype for ExpressMIMO, to assess the applicability of the platform for latency critical standards, to identify design bottlenecks and to propose and implement solutions to overcome the identified limitations. Standard of interest in this context is IEEE 802.11p which is required for the Car-to-Car communication. Our analysis reveals that the Front-End Processing (FEP) DSP engine is heavily charged and that the required configuration time outreaches the pure execution time for short vectors. To meet this challenge we introduce an Application Specific Instruction-Set Processor (ASIP) as the solution of choice when dealing with strong latency requirements. To complete the receiver chain we further present a first Preprocessor prototype which connects the external A/D and D/A converters with the remaining baseband engine. In this context we focus on a generic, flexible and hardware optimized Sample Rate Converter (SRC) that is operating on fractional ratios. As the combination of Car-to-Car and Car-to-Infrastructure communications within only device enables various new applications for future cars we finally investigate on a possible multimodal execution of 802.11p and DAB on the chosen target platform
Maalej, Asma. "Apport de l'échantillonnage aléatoire à temps quantifié pour le traitement en bande de base dans un contexte radio logicielle restreinte." Electronic Thesis or Diss., Paris, ENST, 2012. http://www.theses.fr/2012ENST0022.
Full textThe work presented in this Ph.D. dissertation deals with the design of multistandard radio receivers that process signals with heterogeneous specifications. The originality of these research activities comes from the application of random sampling at the baseband stage of a software defined radio receiver. The purpose behind the choice of random sampling is to take advantage of its alias-free feature. The originality of this work is the analytic proof of the alias attenuation feature of the time quantized random sampling, the implementation version of the random sampling. A second contribution concerns also the analytic study of the simplest implementation version of the random sampling, the time quantized pseudo-random sampling (TQ-PRS). Theoretical formulas allow the estimation of the alias attenuation in terms of time quantization factor and oversampling ratio. Alias attenuation measurement permits to design the baseband stage of the proposed multistandard radio receiver architecture. The design concerns different configuration of the baseband stage according to the performances of the used analog-to-digital converters (ADC). The TQPRS allows decreasing the anti-aliasing filter order or the sampling frequency. The design of the baseband stage reveals a difference on the choice of the time quantization factor for each standard. The power consumption budget analysis demonstrates a power consumption gain of 30% regarding the power consumption of the analog baseband stage. This gain becomes 27.5% when the TQ-PRS clock and the digital canal selection stages are considered
Kaiser, Patricia. "Optimization of a Software Defined Radio multi-standard system using Graph Theory." Thesis, Supélec, 2012. http://www.theses.fr/2012SUPL0025/document.
Full textThe Software-Defined Radio (SDR) concept is emerging as a potential and efficient solution for designing flexible future-proof multi-standard systems. A way of realizing a multi-standard terminal is to identify the appropriate common functions and operators inside and between the standards. This is what's called the parametrization approach, which can be divided into two categories: the pragmatic approach which is a practical version to create and develop common operators, and the theoretical approach which represents a graphical exploration of the SDR multi-standard system at different levels of granularity accompanied with an optimization problem. It’s in this last approach where our thesis subject dwells. In this context, a suggested cost function (in previous work) has to be optimized in order to select the convenient common operators between the different standards, enabling to construct an optimal design. In our work, we theoretically model a previously proposed graph structure of an SDR multi-standard system as a directed hypergraph as well as provide an alternative mathematical formal expression of the suggested cost function, using various graph theoretical definitions and notations. Afterwards, we prove that the associated optimization problem is an NP-problem under a certain constraint, which entails a proof of exclusion of some particular design options when searching for a minimum cost design. This was the second contribution in this thesis before we finally present a new algorithm (which exploits various modelization aspects of directed hypergraphs) that can solve the optimization problem, whose interest is in it giving an exact-optimal solution to our problem instead of a near-optimal one provided by heuristics. A program code for this algorithm was developed in C-language, and then it was applied on several generic case examples in order to explore its performance skills
Poirier-Quinot, David. "Design of a radio direction finder for search and rescue operations : estimation, sonification, and virtual prototyping." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066138/document.
Full textThis research investigates the design of a radio Direction Finder (DF) for rescue operation using victims' cellphone as localization beacons. The conception is focused on an audio interface, using sound to progressively guide rescuers towards their target. The thesis' ambition is to exploit the natural mechanisms of human hearing to improve the global performance of the search process rather than to develop new Direction-Of-Arrival (DOA) estimation techniques.Classical DOA estimation techniques are introduced along with a range of tools to assess their efficiency. Based on these tools, a case study is proposed regarding the performance that might be expected from a lightweight DF design tailored to portable operation. It is shown that the performance of high-resolution techniques usually implemented for DOA estimation are seriously impacted by any size-constraint applied on the DF, particularly in multi-path propagation conditions.Subsequently, a review of interactive parameter mapping sonification is proposed. Various sonification paradigms are designed and assessed regarding their capacity to convey information related to different levels of DF outputs. Listening tests are conducted suggesting that trained subjects are capable of monitoring multiple audio streams and gather information from complex sounds. Said tests also indicate the need for a DF sonification that perceptively orders the presented information, for beginners to be able to effortlessly focus on the most important data only. Careful attention is given to sound aesthetic and how it impacts operators' acceptance and trust in the DF, particularly regarding the perception of measurement noise during the navigation.Finally, a virtual prototype is implemented that recreates DF-based navigation in a virtual environment to evaluate the proposed sonification mappings. In the meantime, a physical prototype is developed to assess the ecological validity of the virtual evaluations. Said prototype exploits a software defined radio architecture for rapid iteration through design implementations. The overall performance evaluation study is conducted in consultation with rescue services representatives and compared with their current search solutions.It is shown that, in this context, simple DF designs based on the parallel sonification of the output signal of several antennas may produce navigation performance comparable to these of more complex designs based on high-resolution methods. As the task objective is to progressively localize a target, the system's cornerstone appears to be the robustness and consistency of its estimations rather than its punctual accuracy. Involving operators in the estimation allows avoiding critical situations where one feels helpless when faced with an autonomous system producing non-sensical estimations. Virtual prototyping proved to be a sensible and efficient method to support this study, allowing for fast iterations through sonifications and DF designs implementations
Morlat, Pierre-François. "Evaluation globale des performances d'un récepteur multi-antennes, multi-standards et multi-canaux." Lyon, INSA, 2008. http://theses.insa-lyon.fr/publication/2008ISAL0133/these.pdf.
Full textA multi-antenna receiver structure able to deal with two 802. 11 b and/or 802. 11 g signais simultaneously in a 40 MHz bandwidth (different to the classical WLAN bandwidth 20 MHz) is defined in this thesis. This structure seems to be very relevant in order to increase QoS taking into account problem of spectral resources. Moreover, a global system evaluation scheme of the multi-* structure is proposed. So, each critical part of the receiver is not considered separately but in a global system approach. First of all, the benefits of the SIMO processing, taking into realistic propagation conditions is given in several multi-* configurations. Ln a second part of the work, it is showed the capability of the 1 x2 SI MO processing to mitigate the effect of RF impairments. After all, a numerical architecture ensuring the processing of both WLAN channels simultaneously received by the multi-branches is validate in order to develop a material demonstrator