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Thematische Bibliographien / Low Power Wide Area / Dissertationen

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Dissertationen zum Thema „Low Power Wide Area“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 25. Juli 2025

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1

Orfanidis, Charalampos. "Robustness in low power wide area networks." Licentiate thesis, Uppsala universitet, Avdelningen för datorteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-351481.

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During the past few years we have witnessed an emergence of Wide Area Networks in the Internet of Things area. There are several new technologies like LoRa, Wi-SUN, Sigfox, that offer long range communication and low power for low-bitrate applications. These new technologies enable new application scenarios, such as smart cities, smart agriculture, and many more. However, when these networks co-exist in the same frequency band, they may cause problems to each other since they are heterogeneous and independent. Therefore it is very likely to have frame collisions between the different networks.

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Kidane, Berhane. "Low Power Wide Area Networks based on LoRA Technology." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017.

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The demand for connected devices, according to the Internet of Things (IoT) paradigm, is expected to grow considerably in the immediate future. Various standards are currently contending to gain an edge over the competition and provide the massive connectivity that will be required by a world in which everyday objects are expected to communicate with each other. Among these standards, Low-Power Wide Area Networks (LPWANs) are continuously gaining momentum, mainly thanks to their ability to provide long-range coverage to devices, exploiting license-free frequency bands. The focus of this thesis

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3

Yu, Yi. "Radio Resource Planning in Low Power Wide Area IoT Networks." Electronic Thesis or Diss., Paris, CNAM, 2021. http://www.theses.fr/2021CNAM1287.

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Cette thèse étudie le problème de planification des ressources pour les réseaux IoT longues portées basés sur les technologies NB-IoT et LoRa. Dans les deux cas, on suppose que les capteurs et les collecteurs sont distribués suivant des processus de points de Poisson spatial indépendants marqués par le caractère aléatoire du canal. Pour le NB-IoT, nous élaborons un modèle de dimensionnement statistique qui estime le nombre de ressources radio nécessaires en fonction du délai d’accès toléré, de la densité des nœuds actifs, des collecteurs et de la configuration de l’antenne. Pour le réseau LoRa

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4

Zhang, Yang. "Design of wide-area damping control systems for power system low-frequency inter-area oscillations." Online access for everyone, 2007. http://www.dissertations.wsu.edu/Dissertations/Fall2007/y_zhang_112007.pdf.

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5

Wunsch, Felix [Verfasser]. "Drahtloses Low Power Wide Area Network bei 2,4 GHz / Felix Wunsch." Karlsruhe : KIT-Bibliothek, 2020. http://d-nb.info/1205001980/34.

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6

Masoumiyan, Farzaneh. "Low-latency communications for wide area control of energy systems." Thesis, Queensland University of Technology, 2020. https://eprints.qut.edu.au/135660/1/Farzaneh_Masoumiyan_Thesis.pdf.

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This project provides reliable and low-latency communications for wide area control in smart grid. For this purpose, a priority differentiation approach is presented. It is embedded with an application-layer acknowledgment mechanism for reliable transmission of time-critical data with high priority.

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Sjöström, Daniel. "Unlicensed and licensed low-power wide area networks : Exploring the candidates for massive IoT." Thesis, KTH, Radio Systems Laboratory (RS Lab), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-214941.

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In the Internet of things (IoT), many applications will require low-power and low-cost to achieve long lifetime and scale (respectively). These types of applications are referred to as massive IoT, as opposed to critical IoT, which emphasizes ultra-high reliability and availability and low latency. One type of network catering to massive IoT applications are Low-Power Wide Area Networks (LPWANs), and presently, many LPWAN standards are trying to assert their role in the IoT ecosystem. This thesis explores LPWANs from both technical and non-technical perspectives to ascertain their use-case ver

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Ortis, Pasamontes Enrique. "Comparison Study and Product Development using Wireless Narrowband Low-power Wide-area Network Technologies." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-227857.

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Nowadays it is more clear that the Internet of things (IoT) is not a transient trend but a completely new industry. The internet of things has the capability to enhance current industries (Industry 4.0), as well as to help protecting the environment and people. The latter is the case with the system developed and described in this thesis. The possibilities that IoT brings are due to the interconnection of heterogeneous embedded devices to the internet. This thesis focus on LPWANs (Low Power Wide Area Networks), which is a new set of technologies specifically design for the needs of IoT devices

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Khalil, O. (Omar). "A use case of low power wide area networks in future 5G healthcare applications." Master's thesis, University of Oulu, 2018. http://jultika.oulu.fi/Record/nbnfioulu-201806022427.

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Abstract. The trend in all cellular evolution to the Long-Term Evolution (LTE) has always been to offer users continuously increasing data rates. However, the next leap forwards towards the 5th Generation Mobile Networks (5G) will be mainly addressing the needs of devices. Machines communicating with each other, sensors reporting to a server, or even machines communicating with humans, these are all different aspects of the same technology; the Internet of Things (IoT). The key differentiator between Machine-to-Machine (M2M) communications and IoT will be the added -feature of connecting devic

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10

CAPUZZO, MARTINA. "Analisi Matematica e Sperimentale di Tecnologie "Low Power Wide Area Network" in Scenari IoT Avanzati." Doctoral thesis, Università degli studi di Padova, 2022. http://hdl.handle.net/11577/3447551.

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Attualmente il concetto di Internet of Things (IoT) è applicato a diversi ambiti, che spaziano da applicazioni di Città Intelligenti (Smart City) a quelle in ambito industriale e agricolo (Smart Industry e Smart Agriculture). Per rispondere agli specifici requisiti di questi scenari sono state progettate le tecnologie Low Power Wide Area Network (LPWAN), tra le quali Long Range Wide Area Network (LoRaWAN) e Narrowband IoT (NB-IoT) hanno un ruolo predominante. Obiettivo di questa tesi è valutare le prestazioni di queste tecnologie, considerando sia scenari IoT “tradizionali”, sia casi d’uso più

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PETTER, LAGUSSON, and NORDLÖF JOHANNA. "A Study of Low-Power Wide-Area Networks and an In-Depth Study of the LoRaWAN Standard." Thesis, KTH, Maskinkonstruktion (Inst.), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-214595.

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Low Power Wide Area Networks (LPWAN) are able to combine long range communication with a low energy consumption sacrificing performance in terms of bit rate and message frequency. This thesis presents a general evaluation of the LPWAN characteristics and a description of the LPWAN protocols LoRaWAN, SigFox and NB-IoT. It also covers a method to evaluate if a LPWAN technology would be a suitable choice of communication technology for a certain use case. Lastly, it covers the implementation of LoRaWAN on a connected electromechanical lock and investigates in the real life performance of the lock

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Eriksen, Rúni. "Energy Consumption of Low Power Wide Area Network Node Devices in the Industrial, Scientific and Medical Band." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-259508.

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Low-Power Wide-Area Networks, LPWANs, achieve long communication ranges with a low energy consumption by communicating at low bit rates. Most LPWAN devices are battery powered and are required to operate for an extended period of time, which stresses the requirements for energy efficiency. This thesis investigates the energy consumption of LPWAN devices operating in the Industrial, Scientific and Medical, ISM, band and how use cases affect the consumption. Specifically, LoRa/LoRaWAN and Sigfox are examined. Their key characteristics are described and energy consumption is modelled. The models

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13

Gilbert, Johann. "Étude et développement d'un réseau de capteurs synchronisés à l'aide d'un protocole de communication sans fil dédié à l'Internet des objets." Thesis, Toulon, 2018. http://www.theses.fr/2018TOUL0012/document.

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Depuis les 20 dernières années, l'essor de l'IoT et du "cloud computing" a conditionné le besoin dedéployer massivement, et globalement, des capteurs afin d'alimenter des bases de données et améliorerla précision des algorithmes d'analyse. Pour répondre à ces demandes, de nouveaux réseaux basés surles bandes de fréquences ISM ont été déployés. Nous avons donc appréhendé de façon complète cestechnologies afin de garantir une qualité maximale pour nos produits mais aussi proposer des conseilsjustes dans un secteur ou abus de langage et promesses de performances sont monnaie courante.Cependant, l

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Petäjäjärvi, J. (Juha). "Low-power wireless communications in the Internet of Things:solutions and evaluations." Doctoral thesis, Oulun yliopisto, 2018. http://urn.fi/urn:isbn:9789526219196.

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Abstract The Internet of Things (IoT) is already providing solutions to various tasks related to monitoring the environment and controlling devices over wired and wireless networks. It is estimated by several well-known research facilities that the number of IoT devices will be in the order of tens of billions by 2020. This inevitably brings challenges and costs in deployment, management, and maintenance of networks. The focus of this thesis is to provide solutions that mainly help in the deployment and maintenance of various wireless IoT networks. Different applications have different require

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15

Wolf, Florian. "Multi-channel ranging system for the localization of wireless connected objects in low power wide aea networks : From modeling to field trials." Thesis, Limoges, 2020. http://www.theses.fr/2020LIMO0017.

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L'Internet des objets (IoT, pour Internet of Things, en anglais) ouvre la porte vers la réalisation de nouvelles applications, telles que les compteurs intelligents et le suivi environnemental, destinées à adresser nos défis sociétaux et écologiques actuels et futurs. Les objets, possiblement mobiles ou distants, nécessitent une connectivité sans fil pour la centralisation des données et le contrôle à distance. Les réseaux longue portée et basse consommation (LPWA, pour Low Power Wide Area, en anglais) offrent des transmissions radio bande étroite avec une couverture à l’échelle typique d’une

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Zeller, Sebastian [Verfasser], Robert [Gutachter] Weigel, Christian [Gutachter] Münker, and Friedel [Gutachter] Gerfers. "Wide-Bandwidth Single-Bit Continuous-Time-Sigma-Delta-Modulation for Area- and Power-Efficient A/D Conversion with Low Jitter Sensitivity / Sebastian Zeller ; Gutachter: Robert Weigel, Christian Münker, Friedel Gerfers." Erlangen : FAU University Press, 2017. http://d-nb.info/1149368713/34.

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Zhang, Li. "Study of FACTS/ESS Applications in Bulk Power System." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/28465.

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The electric power supply industry has evolved into one of the largest industries. Even though secure and reliable operation of the electric power system is fundamental to economy, social security and quality of modern life, the complicated power grid is now facing severe challenges to meet the high-level secure and reliable operation requirements. New technologies will play a major role in helping today's electric power industry to meet the above challenges. This dissertation has focused on some key technologies among them, including the emerging technologies of energy storage, controlled po

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Skog, Andersen Jonas, and Joakim Eriksson. "Investigating the practical performance of the LoRaWAN technology." Thesis, Linköpings universitet, Databas och informationsteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-144387.

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New innovations, technologies, ideas and businesses are driving the realisation of the Internet of Things (IoT) vision. As with many other fields in technology comes competing protocols and standards, ranging from modulation schema used for transmitting data to security standards used to ensure safe operation and the privacy needs for all involved entities. This thesis looks into one of the competing modulation schema and network protocols for IoT applications: the LoRaWAN protocol. The main contribution of this thesis is a datadriven empirical study that helps verify theoretically obtained re

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Henriques, Johan, and William Westerlund. "Digitalization of forest management : Next generation unsupervised monitoring using Internet of Things and Blockchain." Thesis, KTH, Industriell ekonomi och organisation (Inst.), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-278191.

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The forest industry is a fundamental cornerstone of the Swedish economy employing over 70 000 workers on a national scale. In recent years, the industry has seen increased efforts to digitalize operations and management of forestry to reap economical rewards, improve efficiency and gain competitive advantages. Due to living nature of trees, forest-management is a critical activity within the industry; trees and forests maintained properly will reward the owner with not only greater quality and greater quantity of wood, but also a shorter realization of cash flow. Fully realized, data from UPM

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Maslák, Roman. "Implementace a vyhodnocení komunikační technologie LTE Cat-M1 v simulačním prostředí NS-3." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442354.

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The Diploma work deals with the implementation of LTE Cat-M technology in the simulation tool Network Simulator 3 (NS-3). The work describe LPWA technologies and their use cases. In first are described the main parts of the Internet of Things (IoT) and Machine-to-Machine (M2M) communication. Subsequently are described and defined the most used technologies in LPWA networks. Technologies which are used in the LPWA networks are Sigfox, LoRaWAN, Narrowband IoT (NB-IoT) and Long Term Evolution for Machines (LTE Cat-M), where LTE Cat-M technology is described in more details. Simulations are simula

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21

Gilbert, Johann. "Étude et développement d'un réseau de capteurs synchronisés à l'aide d'un protocole de communication sans fil dédié à l'Internet des objets." Electronic Thesis or Diss., Toulon, 2018. http://www.theses.fr/2018TOUL0012.

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Depuis les 20 dernières années, l'essor de l'IoT et du "cloud computing" a conditionné le besoin dedéployer massivement, et globalement, des capteurs afin d'alimenter des bases de données et améliorerla précision des algorithmes d'analyse. Pour répondre à ces demandes, de nouveaux réseaux basés surles bandes de fréquences ISM ont été déployés. Nous avons donc appréhendé de façon complète cestechnologies afin de garantir une qualité maximale pour nos produits mais aussi proposer des conseilsjustes dans un secteur ou abus de langage et promesses de performances sont monnaie courante.Cependant, l

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Oliveira, Rúben Pedrosa. "Sensor networks with multiple technologies: short and long range." Master's thesis, Universidade de Aveiro, 2016. http://hdl.handle.net/10773/22735.

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Mestrado em Engenharia Eletrónica e Telecomunicações<br>Low-Power Wide Area Networks (LPWANs) are one set of technologies that are growing in the eld of the Internet of Things (IoT). Due to the long range capabilities and low energy consumption, Low-Power Wide Area Networks (LPWANs) are the ideal technologies to send small data occasionally. With their unique characteristics, LPWANs can be used in many applications and in di erent environments such as urban, rural and even indoor. The work developed in this dissertation presents a study on the LPWAN LoRa technology, by testing and eva

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Chollet, Nicolas. "Embedded-AI-enabled semantic IoT platform for agroecology." Electronic Thesis or Diss., université Paris-Saclay, 2023. http://www.theses.fr/2023UPASG078.

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L'agriculture moderne nécessite une profonde transformation pour répondre aux défis du développement durable tout en nourrissant qualitativement et quantitativement la population mondiale croissante. Dans cette optique, les agriculteurs adoptent le "Smart Farming" ou agriculture intelligente. C'est une méthode agricole qui utilise la technologie pour améliorer l'efficacité, la productivité et la durabilité de la production agricole. Elle englobe l'usage de capteurs, l'internet des objets (IoT), l'Intelligence Artificielle (IA), l'analyse de données, la robotique et divers autres outils numériq

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Ghahremani, Esmaeil. "Contribution to Wide Area Control of Power Systems." Thesis, Université Laval, 2013. http://www.theses.ulaval.ca/2013/29450/29450.pdf.

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L'objectif principal des réseaux électriques est de convertir l'énergie d'une forme naturelle à la forme électrique et aussi de la distribuer aux clients avec la meilleure qualité. L'énergie électrique est une des formes d'énergie les plus utilisées dans l'industrie, dans les résidences, aux bureaux et dans le transport. Présentement, la complexité des réseaux électriques augmente continuellement en raison de la croissance des interconnexions et de l'utilisation des nouvelles technologies. Également, la croissance de la demande d'énergie

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Segundo, Sevilla Felix Rafael. "Fault-tolerant wide-area control of power systems." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/12231.

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In this thesis, the stability and performance of closed-loop systems following the loss of sensors or feedback signals (sensor faults) are studied. The objective is to guarantee stability in the face of sensor faults while optimising performance under nominal (no sensor fault) condition. One of the main contributions of this work is to deal effectively with the combinatorial binary nature of the problem when the number of sensors is large. Several fault-tolerant controller and observer architectures that are suitable for different applications are proposed and their effectiveness demonstrated.

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Wu, Zhongyu. "Wide Area Analysis and Application in Power System." Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/36427.

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Frequency monitoring network (FNET) is an Internet based GPS synchronized wide-area frequency monitoring network deployed at distribution level. At first part of this thesis, FNET structure and characteristics are introduced. After analysis and smoothing FDR signals, the algorithm of event trigger is present with Visual C++ DLL programming. Estimation of disturbance location method is discussed based on the time delay of arriving (TDOA) in the second part of this work. In this section, author shows the multiply method to calculate event time, which is important when deal with pre-disturbance

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Vahidnia, Arash. "Wide area control through aggregation of power systems." Thesis, Queensland University of Technology, 2013. https://eprints.qut.edu.au/61186/1/Arash_Vahidnia_Thesis.pdf.

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This thesis was a step forward in improving the stability of power systems by applying new control and modelling techniques. The developed methods use the data obtained from voltage angle measurement devices which are synchronized with GPS signals to stabilize the system and avoid system-wide blackouts in the event of severe faults. New approaches were developed in this research for identifying and estimating reduced dynamic system models using phasor measurement units. The main goal of this research is achieved by integrating the developed methods to obtain a feasible wide-area control syst

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Jeffers, Robert Fredric. "Techniques for Wide-Area State Estimation in Power Systems." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/31423.

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Because of a move from Independent System Operators (ISOs) to Regional Transmission Operators (RTOs), a need for real-time wide-area system monitoring has arisen. The state estimator (SE) is the tool currently used in power systems for real-time monitoring. Because current SE techniques become operationally expensive on such large systems, it is beneficial to consider alternate methods for wide-area state estimation (WASE). In particular, hierarchal methods for WASE become beneficial for large systems because of their speed of operation and relatively low data volume. This study tests four

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Yang, Xue Jiao. "Supervisory wide-area control for multi-machine power system." Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/supervisory-widearea-control-for-multimachine-power-system(6c0575f9-7b20-4751-9d67-276aaaa4c7b2).html.

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With the increasing demand for electrical power and the growing need for the restructuring of the power industry, electric power systems have become highly complex with inherent complicated dynamics. Therefore, the study of power system stability has continued to receive significant attention from both academic researchers and industrial practitioners. This thesis focuses on supervisory wide-area control for rotor angle stability of multi-machine power systems using Linear Quadratic Gaussian/Loop Transfer Recovery (LQG/LTR) control theory with guaranteed robustness. The supervisory controllers

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Lin, Katherine Xiaoyan. "Green optical network design : power optimization of wide area and metropolitan area networks." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/66434.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2011.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 133-134).<br>Advancements in technology are fueling huge growth in network traffic capacity. Demand for low cost, reliable, and high bitrate transmissions grows 40-110% internationally every year. To date, most research has focused on cost minimization of wide area and metropolitan area networks. In this thesis, we concentrate instead on finding scalable WAN designs with respect to power constrai

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Lakshminarasimhan, Srivatsan. "Hierarchical state estimation applied to a wide area power systems." Connect to this title online, 2006. http://etd.lib.clemson.edu/documents/1171293429/.

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Khatib, Abdel Rahman Amin. "Internet-based Wide Area Measurement Applications in Deregulated Power Systems." Diss., Virginia Tech, 2002. http://hdl.handle.net/10919/28579.

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Since the deregulation of power systems was started in 1989 in the UK, many countries have been motivated to undergo deregulation. The United State started deregulation in the energy sector in California back in 1996. Since that time many other states have also started the deregulation procedures in different utilities. Most of the deregulation market in the United States now is in the wholesale market area, however, the retail market is still undergoing changes. Deregulation has many impacts on power system network operation and control. The number of power transactions among the utilities

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Gardner, Robert Matthew. "A Wide-Area Perspective on Power System Operation and Dynamics." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/26779.

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Classically, wide-area synchronized power system monitoring has been an expensive task requiring significant investment in utility communications infrastructures for the service of relatively few costly sensors. The purpose of this research is to demonstrate the viability of power system monitoring from very low voltage levels (120 V). Challenging the accepted norms in power system monitoring, the document will present the use of inexpensive GPS time synchronized sensors in mass numbers at the distribution level. In the past, such low level monitoring has been overlooked due to a perceived

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Khan, Kevin Jamil Hiroshi. "Wide Area Power System Monitoring Device Design and Data Analysis." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/34052.

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<p>The frequency disturbance recorder (FDR) is a cost effective data acquisition device used to measure power system frequency at the distribution level. FDRs are time synchronized via the global positioning system (GPS) timing and data recorded by FDRs are time stamped to allow for comparative analysis between FDRs. The data is transmitted over the internet to a central server where the data is collected and stored for post mortem analysis. Currently, most of the analysis is done with power system frequency. </p><p> The purpose of this study is to take a first in depth look at the angle da

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Tania, Mutmainna. "Wide Area Measurement Applications for Improvement of Power System Protection." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/19241.

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The increasing demand for electricity over the last few decades has not been followed by adequate growth in electric infrastructure. As a result, the reliability and safety of the electric grids are facing tremendously growing pressure. Large blackouts in the recent past indicate that sustaining system reliability and integrity turns out to be more and more difficult due to reduced transmission capacity margins and increased stress on the system. Due to the heavy loading conditions that occur when the system is under stress, the protection systems are susceptible to mis-operation. It is under

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Abboud, Samira. "Study and improvement of long range communication technologies for wireless sensor networks." Thesis, Université Clermont Auvergne‎ (2017-2020), 2020. http://www.theses.fr/2020CLFAC028.

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Les progrès des technologies de communication à faible consommation d’énergie et à faible cout ont révolutionne les applications de télédétection et de surveillance. L’Internet des objets (IoT) a promis la création d’un écosystème d’appareils connectes à travers un large éventail d’applications, telles que les villes intelligentes. A l’heure actuelle, de nombreuses normes et technologies concurrentes tentent de saisir l’IoT, en particulier dans le domaine des technologies de télédétection et de communication. LoRa (Long Range) est l’une de ces technologies qui gagne en popularité et en attract

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Keehr, Edward A. (Edward Arthur) 1979. "Low power, low area, monolithic oversampling digital to analog conversion." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/87280.

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Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2002.<br>Includes bibliographical references (p. 199-204).<br>by Edward A. Keehr.<br>M.Eng.

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Ahmed, Hany Ahmed Abdelsalam. "A Centralized Wide Area Control of FACTS for Damping Power System Inter-Area Oscillations." OpenSIUC, 2011. https://opensiuc.lib.siu.edu/dissertations/330.

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Flexible AC Transmission Systems (FACTS) control for damping power system inter-area oscillations is a topic of much interest. However, local decentralized FACTS controllers are either too complicated to be realizable or do not offer satisfactory performance under various system operating conditions. This research develops a procedure for designing a centralized Wide Area Controller (WAC) for FACTS based on the H_infinity method. The H_infinity control can guarantee robust performance by minimizing the effect of certain disturbances on the inter-area oscillations. This dissertation presents a

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Troesch, Florian. "Novel low duty cycle schemes from ultra wide band to ultra low power." Berlin Logos-Verl, 2009. http://d-nb.info/1000804887/04.

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Shah, Yasir Ali, and Muhammad Touqir Pasha. "A Wide Range Low Power Low Jitter All Digital DLL for Video Applications." Thesis, Linköping University, Electronics System, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-59279.

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<p>Technological advancements in video technology have placed stringent requirements on video analog front ends (AFEs) to deliver high resolutions crisp images while consuming low power to deliver optimal performance.</p><p>One of the vital parts of an AFE is a delay locked loop (DLL). The DLL is a first order system that aligns a delayed signal with respect to a reference signal while working in a feedback manner. DLLs find their applications in many electronic devices that deal with clocks in their operation. They are used to improve timing margins and clock delays in microprocessors, memor

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Antoine, Olivier. "Wide area measurement-based approach for assessing the power flow influence on inter-area oscillations." Doctoral thesis, Universite Libre de Bruxelles, 2013. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209368.

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Power systems have been historically designed at a time when the production was<p>centralized and the electricity had to be transmitted to the loads from the closest power<p>plant. Nowadays, there is an increasing integration of decentralized and intermittent pro-<p>duction. Moreover, the energy market coupling has enabled the transfer of electric power<p>for economical purposes. Also, former isolated power systems are now interconnected for<p>reliability and financial reasons.<p>All of these changes make difficult to predict the future behavior of the grid. Studies<p>are done in order to plan

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Qureshi, Abdul Raheem, and Haris Qazi. "Implementation of Low Power, Wide Range ADPLL for Video Applications." Thesis, Linköping University, Electronics System, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-59307.

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<p>Phase locked loop (PLLs) are the keystone for the electronic as well as for the communication circuits. Without any exaggeration, PLLs are found almost in every electronic and communication devices. Countless research has been performed, for the modification and enhancement of the PLLs circuit. While, due to the numerous advantage of the digital circuitry, the recent research is focusing on the all digital implementation of the PLLs. Therefore, it was competitive to touch with burning research.</p><p>Low power and wide range all digital phase locked loop (ADPLL), for video applications is p

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Hu, Dongchen. "A wide-area control for mitigating angle instability in electric power systems." Online access for everyone, 2006. http://www.dissertations.wsu.edu/Thesis/Fall2006/d_hu_091406.pdf.

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Dahal, Nischal. "STANDARDS-BASED SENSOR WEB FOR WIDE AREA MONITORING OF POWER SYSTEMS." MSSTATE, 2009. http://sun.library.msstate.edu/ETD-db/theses/available/etd-06292009-125550/.

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The balance of supply and demand of energy is the key factor in the stability of power systems. A small disturbance in the supply demand relationship, if not properly handled, can cascade into a major outage, costing millions of dollars to the stakeholders. Proper monitoring and exchange of critical information in real time is the only solution to prevent the instability in this vulnerable system. But, the disparity in the protocols used by power utilities and the lack of infrastructure for information exchange are proving to be hindrance to obtaining a reliable de-regularized power industry.

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Dong, Jingyuan. "Power System Disturbance Analysis and Detection Based on Wide-Area Measurements." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/30129.

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Wide-area measurement systems (WAMS) enable the monitoring of overall bulk power systems and provide critical information for understanding and responding to power system disturbances and cascading failures. The North American Frequency Monitoring Network (FNET) takes GPS-synchronized wide-area measurements in a low-cost, easily deployable manner at the 120 V distribution level, which presents more opportunities to study power system dynamics. This work explores the topics of power system disturbance analysis and detection by utilizing the wide-area measurements obtained in the distribution ne

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Adewole, Adeyemi Charles. "Voltage stability assessment and wide area protection/control using synchrophasor measurements." Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2380.

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Thesis (DTech (Electrical Engineering))--Cape Peninsula University of Technology, 2016.<br>Electric power systems are being operated closer to their designed stability limits due to the constraints caused by the continuous increase in system loading, and the lack of new power stations and transmission network infrastructure to support this increase in system loading. This coupled with the practice of long distance bulk power transmission and cascading contingencies, makes system instability and consequently blackouts inevitable. In such scenarios, system instabilities like voltage instability

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Goldoost, Soloot Reza. "Wide-area damping control through inverse filtering technique." Thesis, Queensland University of Technology, 2016. https://eprints.qut.edu.au/95937/4/Reza%20Goldoost%20Soloot_Thesis.pdf.

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This thesis proposes a new wide-area controller for enhancing the stability of power systems by damping inter-area oscillations. The obtained controller is a new nonlinear controller that accomplishes the task by using data from PMUs employed throughout the network. The controller improves the damping of inter-area oscillations by providing a supplementary control input for several controllable devices such as excitation systems of synchronous generators and Static Var Compensators. The novel nonlinear inverse filtering controller is developed and investigated in different network configuratio

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De, Souza Marcelo. "Conception d'amplificateur faible bruit reconfigurable en technologie CMOS pour applications de type radio adaptative." Thesis, Bordeaux, 2016. http://www.theses.fr/2016BORD0295/document.

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Les systèmes de communication mobiles permettent l’utilisation de l’information en environnements complexes grâce à des dispositifs portables qui ont comme principale restriction la durée de leurs batteries. Des nombreux efforts se sont focalisés sur la réduction de la consommation d’énergie des circuits électroniques de ces systèmes, une fois que le développent des technologies des batteries ne avance pas au rythme nécessaire. En outre, les systèmes RF sont généralement conçus pour fonctionner de manière fixe, spécifiés pour le pire cas du lien de communication. Toutefois, ce scénario peut se

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Hill, Adam J. "Analysis, modeling and wide-area spatiotemporal control of low-frequency sound reproduction." Thesis, University of Essex, 2012. http://hdl.handle.net/10545/230034.

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This research aims to develop a low-frequency response control methodology capable of delivering a consistent spectral and temporal response over a wide listening area. Low-frequency room acoustics are naturally plagued by room-modes, a result of standing waves at frequencies with wavelengths that are integer multiples of one or more room dimension. The standing wave pattern is different for each modal frequency, causing a complicated sound field exhibiting a highly position-dependent frequency response. Enhanced systems are investigated with multiple degrees of freedom (independently-controll

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Zhu, Kun. "Data Quality in Wide-Area Monitoring and Control Systems : PMU Data Latency, Completness, and Design of Wide-Area Damping Systems." Doctoral thesis, KTH, Industriella informations- och styrsystem, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-129078.

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The strain on modern electrical power system operation has led to an ever increasing utilization of new Information Communication Technology (ICT) systems to enhance the reliability and efficiency of grid operation. Among these proposals, Phasor Measurement Unit (PMU)-based Wide-Area Monitoring and Control (WAMC) systems have been recognized as one of the enablers of “Smart Grid”, particularly at the transmission level, due to their capability to improve the real-time situational awareness of the grid. These systems differ from the conventional Supervisory Control And Data Acquisition (SCADA)

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