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Dissertations / Theses on the topic 'UWB Filter'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 January 2024

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1

Zeng, Dongsong. "Pulse Shaping Filter Design and Interference Analysis in UWB Communication Systems." Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/28477.

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Ultra wideband (UWB) is a promising technology for short range and high-speed wireless communications such as home entertainment, wireless video downloading, wireless LAN, wireless USB and so on. This dissertation studied several important issues in the application of UWB technology and its contributions are summarized as follows. First, a 2-stage optimal UWB pulse shaping filter design procedure is proposed, which not only satisfies the FCC transmission spectral masks but also suppress the multiple access interference (MAI). The major advantages of the proposed joint optimization method are:

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2

Fischer, Timothy W. "An analog approach to interference suppression in ultra-wideband receivers." Texas A&M University, 2003. http://hdl.handle.net/1969.1/5769.

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Because of the huge bandwidth of Ultra-Wideband (UWB) systems, in-band narrowband interference may hinder receiver performance. In this dissertation, sources of potential narrowband interference that lie within the IEEE 802.15.3a UWB bandwidth are presented, and a solution is proposed. To combat interference in Multi-Band OFDM (MB-OFDM) UWB systems, an analog notch filter is designed to be included in the UWB receive chain. The architecture of the filter is based on feed-forward subtraction of the interference, and includes a Least Means Squared (LMS) tuning scheme to maximize attenuation. The

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Omid, Abedi. "Analog and Digital Approaches to UWB Narrowband Interference Cancellation." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23366.

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Ultra wide band (UWB) is an extremely promising wireless technology for researchers and industrials. One of the most interesting is its high data rate and fading robustness due to selective frequency fading. However, beside such advantages, UWB system performance is highly affected by existing narrowband interference (NBI), undesired UWB signals and tone/multi-tone noises. For this reason, research about NBI cancellation is still a challenge to improve the system performance vs. receiver complexity, power consumption, linearity, etc. In this work, the two major receiver sections, i.e., analog

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Bargshady, Nader. "Precise Tracking of Things via Hybrid 3-D Fingerprint Database and Kernel Method Particle Filter." Digital WPI, 2017. https://digitalcommons.wpi.edu/etd-dissertations/361.

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"Precise Tracking of Things (PToT) using RF signals has posed a serious challenge in an indoor environment. The precision localization information is an enabler for better coordinated-tasks and is essential for a successful launch of many emerging applications. PToT relies on two principal components, a novel navigation (tracking) algorithm, and a hybrid 3D fingerprint database. In this dissertation, we begin by using the two widely known ranging techniques, Time Of Arrival (TOA) associated with Ultra-wideband (UWB) and Received Signal Strength (RSS) with WiFi signals. First, we use the theore

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Arafat, Saeed [Verfasser], Klaus [Akademischer Betreuer] Solbach, and Ingolf [Akademischer Betreuer] Willms. "Design Analog FIR Filter for UWB Frequency Band / Saeed Arafat. Gutachter: Ingolf Willms. Betreuer: Klaus Solbach." Duisburg, 2015. http://d-nb.info/1069069558/34.

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6

Ahtaryieva, Lilia. "Statistical mapping of real environments with uwb radars." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/8590/.

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In this master thesis I evaluated the performance of a Ultra-Wide Bandwidth (UWB) radar system for indoor environments mapping. In particular, I used a statistical Bayesian approach which is able to combine all the measurements collected by the radar, including system non-idealities such as the error on the estimated antenna pointing direction or on the estimated radar position. First I verified through simulations that the system was able to provide a sufficiently accurate reconstruction of the surrounding environment despite the limitations imposed by the UWB technology. In fact, the emissi

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Khan, Abbas. "Optimization through Co-Simulation of Antenna, Bandpass Filter and Low-Noise Amplifier at 6-9 GHz." Thesis, Linköpings universitet, Fysik och elektroteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-110575.

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Ultra-wide band (UWB) 6-9 GHz antenna, band pass filter and low-noise amplifier (LNA) optimization using co-simulation of the RF front-end. At higher frequencies, carefully conducted design methodologies are required for RF front-end parameter optimization, such as power gain and low noise figure with low power consumption.

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8

Nilsson, Max. "Performance Comparison of Localization Algorithms for UWB Measurements with Closely Spaced Anchors." Thesis, Luleå tekniska universitet, Rymdteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-70996.

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Tracking objects or people in an indoor environment has a wide variety of uses in many different areas, similarly to positioning systems outdoors. Indoor positioning systems operate in a very different environment however, having to deal with obstructions while also having high accuracy. A common solution for indoor positioning systems is to have three or more stationary anchor antennas spread out around the perimeter of the area that is to be monitored. The position of a tag antenna moving in range of the anchors can then be found using trilateration. One downside of such a setup is that the

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9

Pelikán, Michal. "Textilní vlnovod." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-316437.

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Diploma thesis is focused on manufacturing process of waveguide filter. Thesis is divided to 8 chapters. There is summarized theory of possible execution of waveguide filter, used materials, their influence and risks during production. Then are described possible steps of realization and necessary relations for its design, simulation and also practical realization. At conclusion are summarized, compared and described reached results.

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10

Vallese, Alessio. "Analysis and design of a notch filter for the rejection of interference in UWB systems and its application to a 0.13-um CMOS receiver front-end." Doctoral thesis, Università degli studi di Padova, 2008. http://hdl.handle.net/11577/3425568.

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This work reports the analysis and the design of a 0.13-um CMOS fourth-order notch filter for the rejection of the 5-6 GHz interference in UWB front-ends. The filter is integrated into an analog front-end for Mode #1 UWB systems, i.e. operating in the 3.1-4.8 GHz frequency range. A thorough analysis based on a simplified model of the filter is carried out. An algorithm for the automatic tuning and calibration of the filter is also discussed and demonstrated. Two versions of the circuit are designed and fabricated: the first comprises a low-noise amplifier (LNA) and the filter, the second expan

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SAXENA, GAURAV. "DESIGN AND ANALYSIS OF MICROWAVE COMPONENTS FOR MIMO COMMUNICATION SYSTEM." Thesis, DELHI TECHNOLOGICAL UNIVERSITY, 2020. http://dspace.dtu.ac.in:8080/jspui/handle/repository/18776.

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Wireless communication demands better channel capacity with a high data rate in the modern era. To fulfill these demands, the MIMO-communication systems are developed that use manifold antennas for transmitter and receiver end. MIMO is a state-of-art technology that improves the reliability of the communication systems by utilizing the diversity technique to mitigate the multi-path fading issues, where signals may come together belligerently at the receiver. Improve spectral efficiency is achieved by the total transmitted power spreading over the antennas. Thus, MIMO can increase channel capac

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Berka, Petr. "Snímání scény pomocí USB a FireWire kamer." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217203.

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This diploma thesis deals with a interface USB and FireWire cameras to a computer through a technology called DirectShow. I used mostly a development kit „MontiVision“, which cooperates with a programming environment as is e.g. Microsoft Visual C++. You find here how to use a direct pixel access, how to get singles photos from a video, how to set up and calibrate a camera and how can look a particular application of the image processing. I wrote an introduction to the stereo-vision above the frame of my task. This thesis is like a manual for students. It includes my personal experiences and ex

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Shaman, Hussein Nasser hamad. "Advanced ultra-wideband (UWB) microwave filters for modern wireless communication." Thesis, Heriot-Watt University, 2008. http://hdl.handle.net/10399/2177.

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Ultra-wideband (UWB) microwave filters of various types are essential components in many radar, navigation, position, satellite and modem wireless communication systems. Increasing consumer demand for the convenience and flexibility of wireless connectivity in addition to the need for miniature and low cost devices has had a significant impact on the development of new UWB filters.

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Kraus, Václav. "Analyzátor signálu s FPGA." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2018. http://www.nusl.cz/ntk/nusl-377127.

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The aim of this thesis is to study the possibilities of spectrum calculations, as well as data transfer via USB 3.0 and data saving to a DDR3 memory via FPGA. The focus is also on design and realization of a spectral analyzer with a record of samples to DDR memory expnaded by a narrowband converter using gate arrays. The work is divided into two sections, the first one dealing with the theoretical background. The second part denotes the realization of the design. The result of this work is a signal analyzer in a FPGA controlled from a computer application via the USB 3.0 interface.

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Patočka, Lukáš. "Programovatelný generátor signálu připojitelný přes USB." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-242048.

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The subject of this thesis is design and construction of a periodic signal generator prototype. The generator will use Atmel XMEGA128A4U microcontroller with computer control managed via USB interface. The thesis contains general solutions to the problem of generating signals with a special focus on utilization of DA converter – digital synthesis and reconstruction of the signal from DA converter output to continuous signal. The thesis further deals with implementation of the USB layer using two libraries (LUFA library on microcontroller side and LubUsbDotNet library on computer side). The fin

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Kondapalli, Soumya. "Digital Systolic Architectures for UWB Beamforming using 2-D IIR Spatio-temporal Frequency-planar Beam Filters." University of Akron / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=akron1376925582.

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Collard, Bovy Anne. "Emetteur récepteur UWB à 1Gbps : étude et développement de l’étage numérique." Aix-Marseille 1, 2010. http://theses.univ-amu.fr.lama.univ-amu.fr/2010AIX11010.pdf.

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L'augmentation du débit est l'un des principaux axes de la recherche sur les transmissions sans fils. Les recherches effectuées durant ce doctorat avaient cette finalité et ce dans un des domaines des plus prometteurs : les communications à bande ultra large. Largement plébiscités en aérospatiale et communications réseaux, ces solutions font sont l'objet de toutes les attentions depuis leur réglementation sans licence de la part de la « Federal Communications Commission ». Dans notre cas, l'étude s'est porté sur la transmission à très faible distance, moins d'un mètre, d'un signal à un giga bi

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Schwieger, Felix. "Orbit Determination for UWE-4 based on Magnetometer and Sun Sensor Data using Equinoctial Orbital Elements." Thesis, Luleå tekniska universitet, Institutionen för system- och rymdteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-61551.

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An autonomous, real-time orbit determination system was developed within thiswork for the next iteration of the University of W¨urzburg’s CubeSat programme.The algorithm only made use of magnetometer and sun sensors, which already wereimplemented on UWE-3, the third satellite in the programme. Previous developedsystems used the same approach, however the unique aspect in this work is thatthe algorithm was implemented using equinoctial elements.A Runge-Kutta-4 integrator propagated the orbit position using the orbit dynamicsunder the consideration of J2-perturbations. Afterwards, an Extended Ka

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Bourtoutian, Rafi. "Objets communicants : miniaturisation des frontaux RF par co-conception." Nantes, 2009. http://www.theses.fr/2009NANT2043.

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Avec les avancées technologiques actuelles, le concept d'objet communicant intelligent devient une réalité. Deux contraintes techniques réduisent encore le déploiement des réseaux de capteurs ou d'objets communicants dans nos sociétés : la consommation et la taille. L'antenne est l'un des composants les plus volumineux d'un tel objet communicant. La miniaturisation de l'antenne par les méthodes classiques entraîne une augmentation de la consommation. L'objectif de cette thèse est d'étudier les potentialités offertes par la co-conception d'antennes miniatures et de composants radiofréquences da

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Kříž, Petr. "Adaptivní kmitočtový filtr." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218632.

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The aim of this work is to design a filter of the type low–pass of order 5th with Butterworth’s approximation in the range of over-tuning 10 – 100 kHz and if it will be possible so! achieve even higher marginal frequencies. To compare two typical representatives of the frequency filters cascading and non-cascading synthesis from the viewpoint the accuracy of an! approximation function, sensitivity to the tolerance values of components, number of the components (mainly OZ) and viability, especially the possibility of electronic over-tuning in selected frequency range. On the basis of these cond

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Huynh, An Ngoc Hiep. "Evaluating UVB and UVA Boosting Technologies for Chemical and Physical Sunscreens." University of Toledo Health Science Campus / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=mco158889865268024.

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22

Ševčík, Břetislav. "Elektronicky řiditelný aktivní filtr 2. řádu." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-217790.

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The diploma thesis deals with the modern design of the control circuits for digital potentiometers and their application in analog systems. The concept of the digital control is demonstrated on the electronically controlled active 2-nd order filter and programmable oscillator. The proposed design of the active filter describes a programmable active 2-nd order filter Sallen-Key. In this circuit it is possible independently programme cut-off frequency, Q factor and type of approximation with very good accuracy. The circuits of the designed filter and designed oscillator are simulated in PSpice (

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23

Carrière, Olivier. "Sequential acoustic inversion for the characterization of shallow sea environments." Doctoral thesis, Universite Libre de Bruxelles, 2011. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209950.

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In marine environments, acoustic wave propagation is determined by sound-speed variations in the water column (related to salinity, temperature and pressure) ,and seafloor properties in shallow environments. The refraction index variations and the boundary conditions guide the wave propagation so that an important amount of acoustic energy can propagate over long distances. Measurements of acoustic transmissions coupled with propagation models can be inverted to infer the water column properties (tomography) and the seafloor and subseafloor properties (geoacoustics).<p><p>In this thesis a new

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Carette, Jerome. "Towards Early Age Characterisation of Eco-Concrete Containing Blast-Furnace Slag and Limestone Filler." Doctoral thesis, Universite Libre de Bruxelles, 2015. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/223447.

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It is estimated that concrete represents 5% of the anthropogenic CO2 emissions, mainly originating from the production of cement, the most essential component of concrete. The recent awareness to the environmental challenges facing our civilization has led the cement industry to consider substituting cement by mineral additions, by-products of existing industries. In this work, a combination of limestone filler and blast furnace slag is used to design an “eco-concrete”, defined as a concrete combining a massive decrease of the cement content as well as mechanical properties and potential durab

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Bolz, Uwe [Verfasser]. "Magnetooptische Untersuchungen der Flussdynamik in YBa2Cu3O7-δ-Filmen [YBa-2-Cu-3-O-7-delta-Filmen] auf ultrakurzen Zeitskalen / vorgelegt von Uwe Bolz". Berlin : dissertation.de, 2002. http://d-nb.info/968330711/34.

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Hauschildt, Daniel [Verfasser], Uwe [Akademischer Betreuer] Schwiegelshohn, and Daniel [Gutachter] Clark. "Random finite set filters for superpositional sensors : Application to multi-object filtering / Daniel Hauschildt ; Gutachter: Daniel Clark ; Betreuer: Uwe Schwiegelshohn." Dortmund : Universitätsbibliothek Dortmund, 2017. http://d-nb.info/1139892622/34.

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Geury, Thomas. "Smart matrix converter-based grid-connected photovoltaic system for mitigating current and voltage-related power quality issues on the low-voltage grid." Doctoral thesis, Universite Libre de Bruxelles, 2017. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/243967.

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The increasing penetration of distributed energy resources, in particular Photovoltaic (PV) production units, and the ever-growing use of power electronics-based equipment has led to specific concern about Power Quality (PQ) in the Low-Voltage (LV) grid. These include high- and low-order current harmonics as well as voltage distortion at the point of common coupling. Solutions to overcome these issues, meeting international grid codes, are being proposed in the context of smart energy management schemes.This work proposes a novel three-phase topology for a PV system with enhanced PQ mitigation

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Correns, Martin [Verfasser], Gerhard [Akademischer Betreuer] Linß, Joachim [Akademischer Betreuer] Denzler, and Uwe [Akademischer Betreuer] Nehse. "Subpixelgenaue Kantenortsbestimmung in digitalen Mehrkanalbildern, dargestellt am Beispiel von Sensoren mit Bayer Pattern Color Filter Array / Martin Correns. Gutachter: Joachim Denzler ; Uwe Nehse. Betreuer: Gerhard Linß." Ilmenau : Universitätsbibliothek Ilmenau, 2011. http://d-nb.info/1016391269/34.

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Correns, Martin [Verfasser], Gerhard [Akademischer Betreuer] Linß, Joachim Akademischer Betreuer] Denzler, and Uwe [Akademischer Betreuer] [Nehse. "Subpixelgenaue Kantenortsbestimmung in digitalen Mehrkanalbildern, dargestellt am Beispiel von Sensoren mit Bayer Pattern Color Filter Array / Martin Correns. Gutachter: Joachim Denzler ; Uwe Nehse. Betreuer: Gerhard Linß." Ilmenau : Universitätsbibliothek Ilmenau, 2011. http://nbn-resolving.de/urn:nbn:de:gbv:ilm1-2011000030.

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Pirotte-Bourgeois, Marie-Louise. "La lente émergence de l'enseignement secondaire laïque pour filles en Belgique (1864-1934)." Doctoral thesis, Universite Libre de Bruxelles, 1994. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/212661.

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Dedecker, Renée. "Egalités-Inégalités: le placement des filles dans le système de protection de la jeunesse." Doctoral thesis, Universite Libre de Bruxelles, 1986. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/213532.

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Horincq, Rosine. "DU COMING OUT RECENT DES FILLES ET DES FEMMES (LESBIENNES, BISEXUELLES, AUTRES), A L’HETEROSYSTEME." Doctoral thesis, Universite Libre de Bruxelles, 2017. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/251805.

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Cette recherche qualitative souhaite contribuer à une meilleure compréhension du phénomène du coming out récent, à partir des situations de filles et de femmes, lesbiennes, bisexuelles, autres, sans étiquette. Nous avons utilisé la Méthodologie de la Théorisation Enracinée, selon la Grounded Theory. De manière inductive, deux analyses ont été réalisées à partir des mêmes données, des vécus de ces personnes. L’une est structurelle, il s’agit de l’analyse de genre et l’autre est relationnelle, il s’agit de l’analyse systémique. La première a offert des théorisations sur l’hétérosexisme et l’hété

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Obando, Vega Pedro Javier. "Filtered Tabulated Chemistry for LES of non-premixed combustion." Doctoral thesis, Universite Libre de Bruxelles, 2021. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/317788.

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This work addresses the application of non-premixed filtered tabulated chemistry as a turbulent combustion modeling strategy in the LES framework. On the first part of this study the effects of the filtering operation on non-premixed flamelets are carefully appraised, considering an individual flamelet and the entire manifold. Subsequently, a systematic approach is followed where first the numerical implementation is verified. Afterwards validation is done on a coflow laminar diffusion flame, where promising results encourage the further model appraisal on a more complex turbulent configuratio

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Di, Spurio Laura. "Comment l’adolescence vient aux filles :discours, modèles et réalités: Une histoire de l’adolescence féminine en Belgique francophone (1919 à 1960)." Doctoral thesis, Universite Libre de Bruxelles, 2016. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/235776.

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Cette thèse interroge l’idée d’adolescence et son édification en tant que catégorie d’âge à travers l’intégration des filles en son sein. Le contexte de la Belgique francophone de 1919 à 1960 offre la toile de fond de cette étude qui a pour but d’analyser la « circulation créative » de l’idée d’adolescence, de saisir les effets de cette circulation du savoir aux institutions, du social au culturel. Pour vérifier cette « circulation créative », le corpus de source se devait d’être hétérogène. Aussi est-ce aussi d’un corpus de sources éclaté que cette étude s’est articulée. Ma recherche se struc

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Lombard, Philippe. "Étude de l'impact du filtrage et des non-linéarités sur les signaux ULB dans les front-end-radio-frequence et les réseaux hybrides optique-radio." Grenoble 1, 2007. http://www.theses.fr/2007GRE10297.

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Les systèmes Ultra Larges Bandes (ULB) représentent une nouvelle technologie de communication sans fil pour la transmission d’informations à très hauts débits. Avec une Densité Spectrale de Puissance (DSP) inférieure à -41. 3 dBm/MHz, les distances de propagation sont considérablement restreintes (< 20 m). C’est en février 2002, que la commission fédérale de communication des Etats-Unis (FCC) a alloué pour les systèmes ULB une bande de fréquence comprise entre 3,1 et 10,6 GHz. Depuis, de nombreuses divergences sont apparues suivant les grandes zones géographiques de normalisation. Au traver

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Durand, Laurence. "Développement et formulations de produits solaires conditionnés sous forme d'aérosol." Doctoral thesis, Universite Libre de Bruxelles, 2010. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210131.

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L’exposition au soleil, et donc aux rayons ultraviolets, est de plus en plus fréquente chez l’homme dans les pays occidentaux. En effet, les modes de vie ont fortement changé ces dernières années, avec pour résultat une augmentation non négligeable des loisirs en extérieur. Ceci a pour conséquence une augmentation de l’apparition des cancers cutanés, dont le pronostic de survie est souvent mauvais et l’issue fatale. De plus, les traitements associés à ces maladies sont lourds et n’agissent pas toujours de façon efficace. Les campagnes d’information et de prévention face aux dangers du soleil r

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Khokhar, Muhammad Irfan. "Optimisation of concrete mix design with high content of mineral additions: effect on microstructure, hydration and shrinkage." Doctoral thesis, Universite Libre de Bruxelles, 2010. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209985.

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The cement being used in the construction industry is the result of a chemical process<p>linked to the decarbonation of limestone conducted at high temperature and results in a<p>significant release of CO2. This thesis is part of the project EcoBéton (Green concrete) funded<p>by the French National Research Agency (ANR), with a purpose to show the feasibility of<p>high substitution of cement by mineral additions such as blast furnaces slag, fly ash and<p>limestone fillers. Generally for high percentages of replacements, the early age strength is<p>lower than Portland cement concrete. To cope w

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Lalj, Hicham. "Conception et caractérisation de filtres et systèmes antennaires reconfigurables chargés par des résonateurs Métamateriaux sub-longueurs d’onde." Thesis, Rennes, INSA, 2014. http://www.theses.fr/2014ISAR0022/document.

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Les structures de base de méta-matériaux nourrissent une alternative technologique prometteuse qui vise à répondre à de nouvelles contraintes de miniaturisation et de performances radioélectriques des systèmes reconfigurables à bas coût.Les travaux de cette thèse reposent sur l’association des cellules Métamateriaux unitaires sub-longueurs d’ondes miniatures et agiles, selon des conditions d’excitation électromagnétique en champ proche, à des dispositifs micro-ondes planaires afin de réaliser de nouvelles structures de filtres et de systèmes antennaires reconfigurables.Après une présentation d

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Milojevic, Dragomir. "Implémentation des filtres non-linéaires de rang sur des architectures universelles et reconfigurables." Doctoral thesis, Universite Libre de Bruxelles, 2004. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/211147.

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Les filtres non-linéaires de rang sont souvent utilisés dans le but de rehausser la qualité d'une image numérique. Leur application permet de faciliter l'interprétation visuelle et la compréhension du contenu des images que ce soit pour un opérateur humain ou pour un traitement automatique ultérieur. Dans le pipeline d'une chaîne habituelle de traitement des images, ces filtres sont appliqués généralement dans la phase de pré-traitement, juste après l'acquisition et avant le traitement et l'analyse d'image proprement dit.<p>Les filtres de rang sont considérés comme un important goulot d'étrang

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Tondreau, Gilles. "Damage localization in civil engineering structures using dynamic strain measurements." Doctoral thesis, Universite Libre de Bruxelles, 2013. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209466.

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This thesis focuses on the development of a new method for the continuous<p>monitoring of civil engineering structures in order to locate small damages automatically. A<p>review of the very wide literature on Structural Health Monitoring (SHM) points first out that<p>the methods can be grouped in four categories based on their need or not of a numerical model,<p>as well as their need or not of information of the damaged structure to be applied. This state<p>of the art of the SHM methods highlights the requirement to reach each levels of SHM, which<p>is in particular for the localization of sma

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Hites, Gisèle. "Essays on the dynamics of cross-country income distribution and intra-household time allocation." Doctoral thesis, Universite Libre de Bruxelles, 2007. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210601.

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This thesis contributes to two completely unrelated debates in the economic literature, similar only in the relatively high degree of controversy characterizing each one. <p>The first part is methodological and macroeconomic in nature, addressing the question of whether the distribution of income across countries is converging (i.e. are the poor catching up to the rich?) or diverging (i.e. are we witnessing the formation of two exclusive clubs, one for poor countries and another one for rich countries?). Applications of the simple Markov model to this question have generated evidence in favor

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Tshibilondi, Ngoyi Albertine. "Genre, éducation et développement: enjeux de l'éducation de la femme en Afrique. Cas des femmes congolaises au Kasaï." Doctoral thesis, Universite Libre de Bruxelles, 2003. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/211220.

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Ouali, Nouria. "Migration et accès au marché du: les effets émancipateurs sur la condition des femmes issues de l'immigration." Doctoral thesis, Universite Libre de Bruxelles, 2008. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210479.

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La thèse a pour objet l'émancipation des femmes issues de l'immigration. Elle propose d'évaluer les effets de la migration et de l'accès au marché du travail sur l'émancipation des filles de migrantes d'origine marocaine en Belgique francophone.<p>L'étude tente d'abord de mettre en lumière le rôle des femmes immigrées dans l'histoire de la Belgique en le ré-articulant à l'histoire sociale, l'histoire des femmes et l'histoire de l'immigration. Ensuite, elle montre que l'approche dominante des travaux sur les migrations ne prend pas en compte la dimension du genre, ce qui a pour conséquence de m

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Wang, Qianqian. "A Coplanar Waveguide UWB Antenna With Notch Filter." Thesis, 2012. http://hdl.handle.net/1828/4678.

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Due to the release of 3.1-10.6 GHz band, UWB systems have a rapidly progressive development. They have been widely employed in short-range communication applications and large-bandwidth handheld devices. As part of the system, the UWB antenna plays an extremely important role. Due to the trend towards integrated printed circuits, co-planar waveguide technology is a feasible solution for designing the UWB antenna. This thesis focuses on designing a UWB co-planar waveguide antenna with a band-stop filter. This band-stop filter offers rejection to unwanted frequencies in the range of the opera

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Huang, Meng-Chieh, and 黃盟傑. "Design of UWB Antenna with Band-Notch Filter." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/54797818756512072791.

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碩士<br>國立臺灣科技大學<br>電子工程系<br>96<br>The purpose of this thesis is to design antennas and filters which can be used in UWB wireless communication system. In this thesis, planar antennas and filters are investigated and verified for UWB. A novel CPW ultra-wideband (UWB) antenna combined with a compact band-pass filter is proposed. The proposed antenna with band-notch function is to use embedded resonance cell. The band-notch antenna satisfies the return loss requirement of less than -10 dB over the frequency range of 3.1 to 10.6 GHz with a rejection band around 5.34 to 5.97 GHz. The proposed UW

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SAZID, MOHD. "DESIGN OF COMPACT BAND PASS FILTER FOR UWB APPLICATION WITH MULTIPLE NOTCHES." Thesis, 2023. http://dspace.dtu.ac.in:8080/jspui/handle/repository/20419.

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Radio frequency (RF) filters are essential components of the present wireless communication systems as it enables and enhances their functionality. RF filter’s primary objective is to govern and control electromagnetic signals ensuring that they operate within a particular frequency spectrum. However, the upper stopband of conventional Ultra-Wideband (UWB) filters was limited, and they were sensitive to interference from other wireless services. To satisfy the need of integrated services and overcome the shortcomings of its forerunner, UWB filters have greatly improved. They are co

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Chen, Yu-Fan, and 陳昱帆. "Joint Channel Estimation and Adaptive Filter for DS-UWB Systems." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/41697104499941082506.

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碩士<br>國立中正大學<br>通訊工程研究所<br>93<br>Recently, wireless communications are more and more important in daily life. With the increase of user number, wireless systems that offer high data rate are of great demand, therefore, many wireless techniques are developed, such as IEEE 802.11 a/b/g, ultra-wide band systems. Among these wireless techniques, ultra-wide band (UWB) systems attract many attentions due to their high data rate transmission for indoor environment, low power consumption, low implementation cost, precise positioning capability and extremely low interference. In this thesis, the direct

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Tu, Li-Mei, and 涂莉梅. "The design and fabrication of a 3.1-10.6 GHz UWB bandpass filter." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/51079623800846564568.

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碩士<br>南台科技大學<br>電子工程系<br>95<br>The UWB (ultra wide-band) bandpass filter has extensively been exploited as one of the key building blocks in the front of the RF (Radio Frequency) UWB system to improve signal quality. In this paper, based on the multi-mode resonance of the stepped-impedance resonator (SIR), the hybrid parallel-coupled microstrip line (PCML) and interdigitial structure, the performance of low insertion loss and wide passband can be exhibited. The ultimate goal is to fabricate a 3.1-5 GHz bandpass filter and a 6-10.6 GHz bandpass filter on a FR4 (Glass-Epoxy Double Sided) substra

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Hung, Chi-Tang, and 洪啟堂. "Study of 3.1-10.6GHz UWB, K-band, and C-band CMOS Bandpass Filter." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/94492069068752241949.

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碩士<br>國立暨南國際大學<br>電機工程學系<br>98<br>This thesis is mainly studied the passive device and passive circuit for RF Microwave applications. Study theme is divided into three parts： The first part, Ultra-Wide band-pass filter is designed for 3.1 to 10.6GHz. Mainly, a kind of band pass filter is designed by lumped device and implemented based on synthetic transmission lines (TLs). Measured results show that the band pass filter has 3dB bandwidth range from 3.3 to 8GHz, the minimun insertion loss of 6.05 dB, and group delay of 153.71±135.67ps. In the second part, K-band band-pass filter is designed. A

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Chang, Yi-Lung. "The design of antenna and filter for 3 ~10 GHz UWB wireless communication system." 2007. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-3001200717422200.

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