Relevant bibliographies by topics / Digital signal transmission / Dissertations / Theses
To see the other types of publications on this topic, follow the link: Digital signal transmission.

Dissertations / Theses on the topic 'Digital signal transmission'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Digital signal transmission.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Moore, Philip John. "Adaptive digital distance protection." Thesis, City University London, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328244.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Dogheche, El Hadj. "Transmission optique d'un signal analogique hyperfréquence et digital bas débit." Lille 1, 1993. http://www.theses.fr/1993LIL10056.

Full text
Abstract:
Le centre national d'études spatiales de Toulouse a envisagé, dans ses projets spot 2000 et radar 2000, la possibilité de remplacer les liaisons classiques (câble coaxial) reliant l'antenne active et le cur du satellite, par des liaisons à fibre optique. Cette étude a consisté à étudier le transport microonde d'une liaison optohyperfréquence. Celle-ci est réalisée à l'aide de composants optoélectroniques commerciaux fibres, et utilise la modulation directe de l'émetteur. Nous démontrons la possibilité d'améliorer le bilan de transfert de la liaison par l'adaptation d'impédance passive réactive
APA, Harvard, Vancouver, ISO, and other styles
3

Sant'Ana, Roberto Garcia Rosa. "Investigation of new digital protection for multi-terminal power lines." Thesis, University of Manchester, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334628.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Shahri, Javad Yazdani Kohneh. "High frequency digital power line transmission for terrestrial and marine networks." Thesis, Lancaster University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288950.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Usta, Ö. "A power based digital algorithm for the protection of embedded generators." Thesis, University of Bath, 1992. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.251234.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Lundbäck, Jonas. "On signal processing and electromagnetic modelling : applications in antennas and transmission lines /." Karlskrona : Department of Signal Processing, School of Engineering, Blekinge Institute of Technology, 2007. http://www.bth.se/fou/Forskinfo.nsf/allfirst2/62a51cd9a6f3d716c12572c1003f0063?OpenDocument.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Wong, K.-H. H. "Transmission of channel coded speech and data over mobile radio channels." Thesis, University of Southampton, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235340.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Irizar, José María Zabalegui. "Combined equalisation and decoding for OFDM over wireless fading channels." Thesis, Staffordshire University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.272580.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Loasby, J. M. "Real time transmission line modelling of the vocal tract using multiple digital signal processors." Thesis, University of Nottingham, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.339551.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Prodaniuc, Cristian. "Advanced Signal Processing for Pulse-Amplitude Modulation Optical Transmission Systems." Doctoral thesis, Universitat Politècnica de València, 2019. http://hdl.handle.net/10251/117315.

Full text
Abstract:
[ES] Los sistemas de transmisión óptica no-coherente se emplean actualmente en las redes ópticas de corto alcance (< 80 km), como son las redes de ámbito metropolitano. La implementación más común en el estado del arte se basa en sistemas que emplean multiplexación por división en longitud de onda (WDM, wavelength division multiplexing) de cuatro longitudes de onda (¿) proporcionando un régimen binario de 100 Gbps (4¿×25 Gbps). En los últimos años, los sistemas de transmisión ópticos no-coherentes están evolucionando desde 100 Gbps a 400 Gbps (4¿×100 Gbps). Dado que este mercado comprende un g
APA, Harvard, Vancouver, ISO, and other styles
11

Guiomar, Fernando Pedro Pereira. "Digital nonlinear equalization for optical transmission systems." Doctoral thesis, Universidade de Aveiro, 2015. http://hdl.handle.net/10773/15977.

Full text
Abstract:
Doutoramento em Engenharia Eletrotécnica<br>This thesis focuses on digital equalization of nonlinear fiber impairments for coherent optical transmission systems. Building from well-known physical models of signal propagation in single-mode optical fibers, novel nonlinear equalization techniques are proposed, numerically assessed and experimentally demonstrated. The structure of the proposed algorithms is strongly driven by the optimization of the performance versus complexity tradeoff, envisioning the near-future practical application in commercial real-time transceivers. The work is initia
APA, Harvard, Vancouver, ISO, and other styles
12

Kim, Dukhyun. "Orthogonal frequency division multiplexing for digital broadcasting." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/13704.

Full text
APA, Harvard, Vancouver, ISO, and other styles
13

Frappé, Antoine. "All-digital RF signal generation using delta-sigma modulation for mobile communication terminals." Lille 1, 2007. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/2007/50376-2007-Frappe.pdf.

Full text
Abstract:
Dans le cadre de la radio logicielle, un transmetteur numérique, basée sur la modulation delta-sigma, est proposé. Son architecture est construite autour de deux modulateurs delta-sigma passe-bas suréchantillonnés du 3ème ordre qui fournissent un signal multiplexé sur 1 bit à haute cadence, qui code directement le signal RF dans le domaine numérique. La séquence de sortie peut ensuite être appliquée à l'entrée d'un amplificateur de puissance commuté ayant une bonne efficacité. Le standard UMTS a été choisi comme exemple d'application et un générateur de signaux RF 1 bit à 7. 8Géch/s a été réal
APA, Harvard, Vancouver, ISO, and other styles
14

Shehata, Mohamed. "Hybrid Analogue and digital techniques applied to massive MIMO systems for 5G transmission at millimeter waves." Thesis, Rennes, INSA, 2019. http://www.theses.fr/2019ISAR0026.

Full text
Abstract:
L’objectif principal de ce travail est d’analyser analytiquement les performances de la formation de faisceaux hybrides (HBF) dans des systèmes MIMO massifs à ondes millimétriques (mmWave), de développer des algorithmes HBF de faible complexité et optimiser les systèmes hybrides comprenant des analogiques et numériques pour s’adapter à ces systèmes et enfin de vérifier la validité pratique de ces algorithmes. Le système MIMO massif fournit un gain de transmission élevé, permettent de compenser les pertes importantes en espace libre inhérentes aux transmissions mmWave. D'autre part, l’utilisati
APA, Harvard, Vancouver, ISO, and other styles
15

Shibahara, Kohki. "Advanced Signal Processing for Fiber-Optic Communication Systems Scaling Capacity Beyond 100 Tb/s." Kyoto University, 2017. http://hdl.handle.net/2433/227663.

Full text
APA, Harvard, Vancouver, ISO, and other styles
16

Xu, Tianhua. "Digital Dispersion Equalization and Carrier Phase Estimation in 112-Gbit/s Coherent Optical Fiber Transmission System." Licentiate thesis, KTH, Optik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-34034.

Full text
Abstract:
Coherent detection employing multilevel modulation format has become one of the most promising technologies for next generation high speed transmission system due to the high power and spectral efficiencies. With the powerful digital signal processing (DSP), coherent optical receivers allow the significant equalization of chromatic dispersion (CD), polarization mode dispersion (PMD), phase noise (PN) and nonlinear effects in the electrical domain. Recently, the realizations of these DSP algorithms for mitigating the channel distortions in the transmission system are the most attractive investi
APA, Harvard, Vancouver, ISO, and other styles
17

Bai, Neng. "Mode-Division Multiplexed Transmission in Few-mode Fibers." Doctoral diss., University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5761.

Full text
Abstract:
As a promising candidate to break the single-mode fiber capacity limit, mode-division multiplexing (MDM) explores the spatial dimension to increase transmission capacity in fiber-optic communication. Two linear impairments, namely loss and multimode interference, present fundamental challenges to implementing MDM. In this dissertation, techniques to resolve these two issues are presented. To de-multiplex signals subject to multimode interference in MDM, Multiple-Input-Multiple-Output (MIMO) processing using adaptive frequency-domain equalization (FDE) is proposed and investigated. Both simula
APA, Harvard, Vancouver, ISO, and other styles
18

Abayaje, Furat. "Transmission numérique sans fil en bande de base pour la communication à courte distance avec des circuits cryogéniques." Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAT017/document.

Full text
Abstract:
Les circuits logiques "Rapid Single-Flux-Quantum" (RSFQ) à base de jonctions Josephson supraconductrices sont utilisés pour générer, traiter et transmettre des impulsions ultra-courtes dont l'aire quantifiée est celle du quantum de flux magnétique h/2e et correspond à 2.07 mV.ps. De tels circuits sont utilisés pour traiter le signal à très haute fréquence avec des fréquences d'horloge dans la gamme 10-120 GHz et une puissance consommée environ 100 à 1000 fois plus faible (incluant le coût énergétique du refroidissement à 4,2 K) que celle des meilleurs circuits semi-conducteurs équivalents. La
APA, Harvard, Vancouver, ISO, and other styles
19

Le, Bidan Raphaël. "Turbo-equalization for bandwidth-efficient digital communications over frequency-selective channels." Rennes, INSA, 2003. http://www.theses.fr/2003ISAR0012.

Full text
Abstract:
Cette thèse traite de la combinaison des fonctions d'égalisation et décodage pour les transmissions haut-débits avec modulations codées sur canaux sélectifs en fréquence. Nous considérons la Turbo-Egalisation, qui instaure un échange itératif d'information entre l'égaliseur et le décodeur. Nous étudions dans un premier temps le turbo-égaliseur reposant sur le critère maximum-a-posteriori, et montrons que ce récepteur offre des gains de performances importants en comparaison avec les récepteurs traditionnels. Nous considérons ensuite une seconde classe de turbo-égaliseurs de moindre complexité
APA, Harvard, Vancouver, ISO, and other styles
20

Bailey, Brian Douglas. "Design of a video measurement system." Thesis, Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/80071.

Full text
APA, Harvard, Vancouver, ISO, and other styles
21

Fernandez, de Jauregui Ruiz Ivan. "Advanced modulation formats and nonlinear mitigation for spectral efficient optical transmission systems." Thesis, Evry, Institut national des télécommunications, 2018. http://www.theses.fr/2018TELE0009/document.

Full text
Abstract:
La majeure partie des communications mondiales est transportée par des systèmes transocéaniques à fibre optique. Il est estimé que d'ici 2020 le trafic de données atteindra 4.3 ZB par an. Afin de faire face à cette demande, différentes technologies sont actuellement étudiées pour augmenter la capacité des systèmes de transmission très longue distance. Avec l'avènement des circuits intégrés à haute vitesse, des formats de modulation avancés et des techniques de traitement de signal numérique (DSP) peuvent être utilisés pour maximiser l'efficacité spectrale de transmission. Par ailleurs, la capa
APA, Harvard, Vancouver, ISO, and other styles
22

Lange, Werner R., and Martin Ravensbergen. "TIME REFERENCE SYSTEM OF THE ESO VERY LARGE TELESCOPE." International Foundation for Telemetering, 1995. http://hdl.handle.net/10150/608540.

Full text
Abstract:
International Telemetering Conference Proceedings / October 30-November 02, 1995 / Riviera Hotel, Las Vegas, Nevada<br>The necessity of supplying precise time information in large telemetry ground stations and astronomical observatories is very similar. Therefore the way of solving this problem as it is done in the Very Large Telescope of the European Southern Observatory can be easily adopted to telemetry stations and ranges, especially when fiber optics are used. The European Southern Observatory (ESO) is building a new observatory in Chile for the Very Large Telescope (VLT). This VLT
APA, Harvard, Vancouver, ISO, and other styles
23

YE, Zi. "Traitement statistique de l'information et du signal pour l'internet des objets sous-marins." Thesis, Institut polytechnique de Paris, 2021. https://tel.archives-ouvertes.fr/tel-03179373.

Full text
Abstract:
On assiste au développement des activités humaines liées au monde océanique, mais aucune norme n'a encore émergé pour l'Internet des objets appliqué aux objets autonomes marins. Bien qu'elle possède une bande passante limitée, l'onde acoustique est le seul moyen de communiquer sur des distances importantes et elle est donc utilisée par de nombreux systèmes sous-marins pour communiquer, naviguer ou déduire des informations sur l'environnement. Cela a conduit à une forte demande de réseaux sans fil qui nécessitent à la fois une bonne efficacité spectrale et énergétique avec la faible complexité
APA, Harvard, Vancouver, ISO, and other styles
24

Stanton, Kevin Blythe. "Jitter and Wander Reduction for a SONET DS3 Desynchronizer Using Predictive Fuzzy Control." PDXScholar, 1996. https://pdxscholar.library.pdx.edu/open_access_etds/1164.

Full text
Abstract:
Excessive high-frequency jitter or low-frequency wander can create problems within synchronous transmission systems and must be kept within limits to ensure reliable network operation. The emerging Synchronous Optical NETwork (SONET) introduces additional challenges for jitter and wander attenuation equipment (called desynchronizers) when used to carry payloads from the existing Plesiochronous Digital Hierarchy (PDH), such as the DS3. The difficulty is primarily due to the large phase transients resulting from the pointer-based justification technique employed by SONET (called Pointer Justific
APA, Harvard, Vancouver, ISO, and other styles
25

Bustamante, Danilo. "High-Precision, Mixed-Signal Mismatch Measurement of Metal-Oxide-Metal Capacitors and a 13-GHz 5-bit 360-Degree Phase Shifter." BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/9240.

Full text
Abstract:
A high-precision mixed-signal mismatch measurement technique for metal-oxide metal (MoM) capacitors as well as the design of a 13-GHz 5-bit 360-degree phase shifter are presented. This thesis presents a high-precision, mixed-signal mismatch measurement technique for metal-oxide–metal capacitors. The proposed technique incorporates a switched-capacitor op amp within the measurement circuit to significantly improve the measurement precision while relaxing the resolution requirement on the backend analog-to-digital converter (ADC). The proposed technique is also robust against multiple types of e
APA, Harvard, Vancouver, ISO, and other styles
26

ALENCAR, Raphael Tavares de. "Diversidade de modulação aplicada a canais com múltiplos percursos." Universidade Federal de Campina Grande, 2014. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/443.

Full text
Abstract:
Submitted by Johnny Rodrigues (johnnyrodrigues@ufcg.edu.br) on 2018-04-20T22:42:49Z No. of bitstreams: 1 RAPHAEL TAVARES DE ALENCAR - DISSERTAÇÃO PPGEE 2014..pdf: 1279047 bytes, checksum: 21e02690d9f7fa6020cc8bc9de97b124 (MD5)<br>Made available in DSpace on 2018-04-20T22:42:49Z (GMT). No. of bitstreams: 1 RAPHAEL TAVARES DE ALENCAR - DISSERTAÇÃO PPGEE 2014..pdf: 1279047 bytes, checksum: 21e02690d9f7fa6020cc8bc9de97b124 (MD5) Previous issue date: 2014-08<br>O canal sem fio tem características de desvanecimento devido ao multipercurso, visto que há reflexões e espalhamentos ao longo do camin
APA, Harvard, Vancouver, ISO, and other styles
27

Jiang, Jeng-Shiann. "Measurement, Modeling, and Performance, of Indoor MIMO Channels." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/5035.

Full text
Abstract:
The objective of this dissertation is to investigate the performance of the recently proposed MIMO technology in real indoor environments based on channel measurements centered at 5.8 GHz. First, a MIMO channel measurement system is implemented based on the virtual antenna array infrastructure. This measurement testbed can acquire the wideband channel matrices of MIMO systems with arbitrary array geometries. The measurement system structure and measurement procedure are described in detail in the first part. The second part is about MIMO channel modeling. Two novel number-of-sources detection
APA, Harvard, Vancouver, ISO, and other styles
28

Gareus, Robin. "The Ardour DAW – Latency Compensation and Anywhere-to-Anywhere Signal Routing Systems." Thesis, Paris 8, 2017. http://www.theses.fr/2017PA080116/document.

Full text
Abstract:
Dans des systèmes numériques essentiellement latents, compenser la latence n’est pastrivial, en particulier lorsque les graphes de routage du signal sont complexes commec’est souvent le cas dans une station audionumérique (DAW).Tandis que le problème général est de nature mathématique, des complicationsapparaissent dans la conception de systèmes audio en temps réel à cause des contraintesdu matériel, de l’architecture du système, ou de l’ingénierie.Pour construire un système fournissant une compensation de latence sur l’intégralitédu graphe avec possibilité de connecter n’importe quelle source
APA, Harvard, Vancouver, ISO, and other styles
29

Muñoz, Limay Katherine, and Rentería David Alonso Barrios. "Mejoramiento de calidad de servicio de señal abierta en una empresa televisiva de la Región de Ica." Bachelor's thesis, Universidad Ricardo Palma, 2015. http://cybertesis.urp.edu.pe/handle/urp/1289.

Full text
Abstract:
La calidad de servicio de televisión de señal abierta en el Perú ha sido un inconveniente en las últimas décadas debido a la mala calidad que se brinda a los usuarios, la llegada de las implementaciones de estaciones terrestres digitales de la Televisión Digital Terrestre (TDT) podrá brindar a los ciudadanos de provincias y lugares lejanos una mejor calidad de imagen en sus televisores, en el cual están involucradas las emisoras televisivas. Una de las características de la señal de la televisión digital es la forma eficiente que tiene para transmitir en cualquier lugar, con alta calidad tant
APA, Harvard, Vancouver, ISO, and other styles
30

Axelberg, Peter. "On Tracing Flicker Sources and Classification of Voltage Disturbances." Doctoral thesis, Högskolan i Borås, Institutionen Ingenjörshögskolan, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-3416.

Full text
Abstract:
Developments in measurement technology, communication and data storage have resulted in measurement systems that produce large amount of data. Together with the long existing need for characterizing the performance of the power system this has resulted in demand for automatic and efficient information-extraction methods. The objective of the research work presented in this thesis was therefore to develop new robust methods that extract additional information from voltage and current measurements in power systems. This work has contributed to two specific areas of interest.The first part of the
APA, Harvard, Vancouver, ISO, and other styles
31

Teichmann, Jürgen. "Untersuchung allgemeiner Eigenschaften, Optimierung und integrierte Realisierung logischer Schaltungen mit hystereseförmiger Übertragungskennlinie." Doctoral thesis, Universitätsbibliothek Chemnitz, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-132705.

Full text
Abstract:
Zur Verbesserung der Störsicherheit bei der digitalen Signalübertragung wird eine Hysterese in die Übertragungskennlinie des Gatters eingefügt. Der Einfluss der Höhe der beiden Schwellwerte auf die Anzahl der auftretenden Fehler wird mittels eines Rechnerprogrammes untersucht. Ein Zufallsgenerator erzeugt Signale in verschiedenen Höhen und Breiten, die sich den ungestörten Signalen überlagern. Es erfolgt eine Umsetzung einer integrierten Schaltung auf einem TTL Master. Die Schaltung wird mittels eines eigens entwickelten Netzwerkanalyseprgrammes berechnet. Messergebnisse werden mitgeteilt<br>T
APA, Harvard, Vancouver, ISO, and other styles
32

Amari, Abdelkerim. "Compensation des effets nonlinéaires pour les transmissions WDM longue distance à 400Gbps et au-delà." Thesis, Paris, ENST, 2016. http://www.theses.fr/2016ENST0031/document.

Full text
Abstract:
Les systèmes de communications optiques jouent un role important pour satisfaire la demande incessante de trafics de données. Cette demande, induite par des applications gourmandes en termes de bande passante et débit, necéssite une augmentation de la capacité des réseaux optiques d’accès et par conséquent une augmentation des capacités de réseaux de transports métropolitains et longues distances. La prochaine génération de systèmes WDM longue distance devrait opérée à des débits de 400Gbps ou 1Tbps. Cette montée en débit s’appuiera sur des nouvelles formes d’ondes avancées de type mono-porteu
APA, Harvard, Vancouver, ISO, and other styles
33

Le, Son Thai. "Advanced digital signal processing for coherent optical OFDM transmissions." Thesis, Aston University, 2016. http://publications.aston.ac.uk/28889/.

Full text
Abstract:
Coherent optical orthogonal frequency division multiplexing (CO-OFDM) has been actively considered as a potential candidate for long-haul transmission and 400 Gb/s to 1 Tb/s Ethernet transport because of its high spectral efficiency, efficient implementation, flexibility and robustness against linear impairments such as chromatic dispersion and polarization mode dispersion. However, due to the long symbol duration and narrow subcarrier spacing, CO-OFDM systems are sensitive to laser phase noise and fibre nonlinearity induced penalties. As a result, the development of CO-OFDM transmission techn
APA, Harvard, Vancouver, ISO, and other styles
34

Mavares, Terán Dimas. "Estimación de canal y selección adaptativa de código espacio-tiempo en sistemas de diversidad en transmisión." Doctoral thesis, Universidad de Cantabria, 2006. http://hdl.handle.net/10803/10662.

Full text
Abstract:
Las técnicas de estimación de canal y de adaptación de la transmisión a las condiciones del entorno son temas de interés actual al estudiar la aplicación de técnicas de diversidad en transmisión en la tercera y cuarta generación de sistemas inalámbricos. En esta tesis se realiza un análisis del impacto del error de estimación de canal y la correlación en sistemas OFDM con diversidad en transmisión basados en codificación espacio-tiempo por bloques (STBC), se proponen técnicas de estimación de canal para estos sistemas y se propone una técnica de adaptación de la transmisión mediante la selecci
APA, Harvard, Vancouver, ISO, and other styles
35

Malkoc, Veysi. "Sequential alignment and position verification system for functional proton radiosurgery." CSUSB ScholarWorks, 2004. https://scholarworks.lib.csusb.edu/etd-project/2535.

Full text
Abstract:
The purpose of this project is to improve the existing version of the Sequential Alignment and Position Verification System (SAPVS) for functional proton radiosurgery and to evaluate its performance after improvement .
APA, Harvard, Vancouver, ISO, and other styles
36

Ribeiro, Moises Vidal. "Tecnicas de processamento de sinais aplicadas a transmissão de dados via rede eletrica e ao monitoramento da qualidade de energia." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/261263.

Full text
Abstract:
Orientador: João Marcos Travassos Romano<br>Tese (doutorado) - Universidade Estadual de Campinas. Faculdade de Engenharia Eletrica e de Computação<br>Made available in DSpace on 2018-08-04T03:58:12Z (GMT). No. of bitstreams: 1 Ribeiro_MoisesVidal_D.pdf: 5330417 bytes, checksum: ebf89b90c9327ce0ba7f3c169b5e260f (MD5) Previous issue date: 2005<br>Resumo: A presente tese tem por objetivo propor e discutir o uso de algumas técnicas de processamento de sinais e de inteligência computacional para a melhoria da transmissão digital de dados via redes elétricas e da análise da qualidade da energia el
APA, Harvard, Vancouver, ISO, and other styles
37

Simão, Daniel Hayashida. "Análise do consumo energético em redes subaquáticas utilizando códigos fontanais." Universidade Tecnológica Federal do Paraná, 2017. http://repositorio.utfpr.edu.br/jspui/handle/1/2774.

Full text
Abstract:
O presente trabalho aborda a aplicação de códigos fontanais em redes subaquáticas. Tais redes transmitem dados abaixo da água fazendo uso de sinais acústicos e possuem diversas aplicações. No entanto, é sabido que esse tipo de rede é caracterizado por uma baixa velocidade de propagação e largura de banda menor que as redes que operam em meios de transmissão mais conhecidos, tais como a transmissão sem fio via ondas de rádio frequência, resultando num maior atraso na entrega de pacotes. Para tentar minimizar estes atrasos e aumentar a eficiência energética das redes subaquáticas, o trabalho o
APA, Harvard, Vancouver, ISO, and other styles
38

Schmidt, Gunnar. "A compatible modulation strategy for embedded digital data streams within high quality video signal transmissions." Thesis, University of South Wales, 1999. https://pure.southwales.ac.uk/en/studentthesis/a-compatible-modulation-strategy-for-embedded-digital-data-streams-within-high-quality-video-signal-transmissions(b5ada1e2-8055-4c94-aa9b-d1dee4f41359).html.

Full text
Abstract:
Major activity and interest has focused upon High and Enhanced Definition Television systems, for at least the past few decades. From the initial analogue approaches, which concentrated on purely television enhancements, the focus continues to fade more towards fully digital multi-program distribution and ultimately to multimedia solutions. The actual activities throughout Europe and America in launching the Digital Video Broadcasting, DVB and the Advanced Television System Committee, ATSC system, clearly identify that television enhancements are still alive. In parallel, discussions upon data
APA, Harvard, Vancouver, ISO, and other styles
39

Dangl, Markus A. "Iterative estimation and detection for single carrier block transmission." Tönning Lübeck Marburg Der Andere Verl, 2007. http://d-nb.info/986923419/04.

Full text
APA, Harvard, Vancouver, ISO, and other styles
40

Maurandi, Victor. "Algorithmes pour la diagonalisation conjointe de tenseurs sans contrainte unitaire. Application à la séparation MIMO de sources de télécommunications numériques." Thesis, Toulon, 2015. http://www.theses.fr/2015TOUL0009/document.

Full text
Abstract:
Cette thèse développe des méthodes de diagonalisation conjointe de matrices et de tenseurs d’ordre trois, et son application à la séparation MIMO de sources de télécommunications numériques. Après un état, les motivations et objectifs de la thèse sont présentés. Les problèmes de la diagonalisation conjointe et de la séparation de sources sont définis et un lien entre ces deux domaines est établi. Par la suite, plusieurs algorithmes itératifs de type Jacobi reposant sur une paramétrisation LU sont développés. Pour chacun des algorithmes, on propose de déterminer les matrices permettant de diago
APA, Harvard, Vancouver, ISO, and other styles
41

Hatae, Daniel Lopes. "Comparação entre esquemas de transmissão e recepção com única e múltiplas portadoras." Universidade Presbiteriana Mackenzie, 2007. http://tede.mackenzie.br/jspui/handle/tede/1448.

Full text
Abstract:
Made available in DSpace on 2016-03-15T19:37:52Z (GMT). No. of bitstreams: 1 Daniel Lopes Hatae.pdf: 1594582 bytes, checksum: 955de063fd5b357da40cc7a4b61676d8 (MD5) Previous issue date: 2007-03-07<br>Fundo Mackenzie de Pesquisa<br>transmissão
APA, Harvard, Vancouver, ISO, and other styles
42

Farhat, Jamil de Araujo. "Eficiência energética e throughput seguros em decode-and-forward seletivo com alocação de potência distribuída." Universidade Tecnológica Federal do Paraná, 2015. http://repositorio.utfpr.edu.br/jspui/handle/1/1368.

Full text
Abstract:
Investiga-se a eficiência energética e o throughput seguros em sistemas de comunicações sem fio cooperativos, em que um par de usuários legítimos (Alice e Bob) são auxiliados por um nó relay e em que a comunicação ocorre na presença de um espião passivo (Eve). Diversos protocolos cooperativos são comparados em relação a estas medidas e se utiliza um algoritmo iterativo e distribuído, baseado no algoritmo Dinkelbach, para alocação de potência entre Alice e o relay. A alocação de potência é utilizada visando maximizar a eficiência energética segura, medida em bits seguros/J/Hz, ou o throughput s
APA, Harvard, Vancouver, ISO, and other styles
43

Dghais, Wael. "Behavioral modeling optimization and enhancement for high-speed analog mixed-signal I/O interfaces." Doctoral thesis, Universidade de Aveiro, 2013. http://hdl.handle.net/10773/12094.

Full text
Abstract:
Doutoramento em Engenharia Electrotécnica<br>A integridade do sinal em sistemas digitais interligados de alta velocidade, e avaliada através da simulação de modelos físicos (de nível de transístor) é custosa de ponto vista computacional (por exemplo, em tempo de execução de CPU e armazenamento de memória), e exige a disponibilização de detalhes físicos da estrutura interna do dispositivo. Esse cenário aumenta o interesse pela alternativa de modelação comportamental que descreve as características de operação do equipamento a partir da observação dos sinais eléctrico de entrada/saída (E/S). O
APA, Harvard, Vancouver, ISO, and other styles
44

Almehmadi, Fares Saleh S. "Secure Chaotic Transmission of Digital and Analog Signals Under Profiled Beam Propagation in Acousto-Optic Bragg Cells with Feedback." University of Dayton / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1426781250.

Full text
APA, Harvard, Vancouver, ISO, and other styles
45

Qian, Hua. "Power Efficiency Improvements for Wireless Transmissions." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/11649.

Full text
Abstract:
Many communications signal formats are not power efficient because of their large peak-to-average power ratios (PARs). Moreover, in the presence of nonlinear devices such as power amplifiers (PAs) or mixers, the non-constant-modulus signals may generate both in-band distortion and out-of-band interference. Backing off the signal to the linear region of the device further reduces the system power efficiency. To improve the power efficiency of the communication system, one can pursue two approaches: i) linearize the PA; ii) reduce the high PAR of the input signal. In this dissertation, we fir
APA, Harvard, Vancouver, ISO, and other styles
46

Glock, Henry Saute. "Metodologia para implantação de redes de frequência única Single Frequency Network – SFN em televisão digital." Programa de Pós-graduação em Sistemas de Comunicação e Automação, 2016. http://bdtd.ufersa.edu.br:80/tede/handle/tede/742.

Full text
Abstract:
Submitted by Lara Oliveira (lara@ufersa.edu.br) on 2017-06-27T22:29:40Z No. of bitstreams: 1 HenrySG_DISSERT.pdf: 34025203 bytes, checksum: 2defdce123ba16681be74520906f9baf (MD5)<br>Rejected by Vanessa Christiane (referencia@ufersa.edu.br), reason: Corrigir referência on 2017-07-03T12:20:54Z (GMT)<br>Submitted by Lara Oliveira (lara@ufersa.edu.br) on 2017-07-04T16:10:45Z No. of bitstreams: 1 HenrySG_DISSERT.pdf: 34025203 bytes, checksum: 2defdce123ba16681be74520906f9baf (MD5)<br>Approved for entry into archive by Vanessa Christiane (referencia@ufersa.edu.br) on 2017-07-04T16:56:33Z (GMT) No. o
APA, Harvard, Vancouver, ISO, and other styles
47

Martins, Vinicius Antonio de Oliveira. "Verificação funcional para circuitos de transmissão e recepção de sinais mistos." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/3/3140/tde-12072017-081700/.

Full text
Abstract:
Este trabalho propõe o desenvolvimento de uma metodologia para a verificação circuitos integrados de sinais mistos de uso em sistemas de comunicação que operem em modo simplex. Deseja-se aproveitar as características inversas de recepção e transmissão para otimizar o processo de verificação. Para o desenvolvimento desta metodologia de verificação, teve-se como objetivo estudar metodologias de verificação de circuitos integrados de sinais mistos existentes e sua evolução, as quais têm garantido cada vez mais a funcionalidade de circuitos integrados que são compostos por blocos analógicos e digi
APA, Harvard, Vancouver, ISO, and other styles
48

Donzelli, Valderez de Almeida. "Polarização elíptica: influência no desempenho de cobertura da TV digital." Universidade Presbiteriana Mackenzie, 2011. http://tede.mackenzie.br/jspui/handle/tede/2748.

Full text
Abstract:
Made available in DSpace on 2016-04-18T21:39:44Z (GMT). No. of bitstreams: 8 Valderez de Almeida Donzelli1.pdf: 2513417 bytes, checksum: 39732bb9cc22ff6c7d8b226a01c7fbb3 (MD5) Valderez de Almeida Donzelli2.pdf: 3170782 bytes, checksum: 5bec891551d4e67354a5cb930c33b44a (MD5) Valderez de Almeida Donzelli3.pdf: 3092150 bytes, checksum: d7f43803b4c7e0a2393cc4faa9f5db7f (MD5) Valderez de Almeida Donzelli4.pdf: 3808963 bytes, checksum: 80f16c085a45c26b9ee5aa087fecb887 (MD5) Valderez de Almeida Donzelli5.pdf: 2761540 bytes, checksum: 6b89bedf4c70eb288d052ad64721157d (MD5) Valderez de Almeida Donzelli
APA, Harvard, Vancouver, ISO, and other styles
49

Nguyen, Trung-Hiên. "Theoretical and experimental study of optical solutions for analog-to-digital conversion of high bit-rate signals." Thesis, Rennes 1, 2015. http://www.theses.fr/2015REN1S110/document.

Full text
Abstract:
Les formats de modulation bidimensionnels (i.e. basés sur l’amplitude et la phase de l’onde porteuse) ont gagné depuis peu le domaine des transmissions par fibre optique grâce aux progrès conjoints de l’électronique rapide et du traitement du signal, indispensables pour réaliser les récepteurs opto-électroniques utilisant la détection cohérente des signaux optiques. Pour pallier les limites actuelles en rapidité de commutation des circuits intégrés électroniques, une voie de recherche a été ouverte il y a quelques années, consistant à utiliser des technologies optiques pour faciliter la parall
APA, Harvard, Vancouver, ISO, and other styles
50

Lecointre, Aubin. "Interface radio IR-UWB reconfigurable pour les réseaux de microsystèmes communicants." Thesis, Toulouse, INSA, 2010. http://www.theses.fr/2010ISAT0026/document.

Full text
Abstract:
Les travaux présentés lors de cette thèse s’inscrivent dans le cadre des réseaux de microsystèmes communicants dont les réseaux de capteurs sont l’exemple le plus connu. La problématique adressée est la conception d’une interface radio communicante répondant aux besoins spécifiques des microsystèmes communicants : simplicité, faible coût, faible consommation, faible encombrement, haut débit et reconfigurabilité. Les technologies actuelles sans fil comme le WiFi, le Bluetooth, et Zigbee ne sont pas en mesure de répondre à ces contraintes spécifiques. L’étude se focalise sur la technologie IR-UW
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the bibliographies on the topic 'Digital signal transmission' for other source types:
Journal articles Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography