Dissertations / Theses on the topic 'Construction of telecommunication systems'
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Umuhoza, Denise. "Metric of trust for mobile ad hoc networks using source routing algorithms." Thesis, University of the Western Cape, 2006. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_8946_1183465240.
Full textThis thesis proposed and presented technical details of new probabilistic metrics of trust in the links wireless ad hoc networks for unobservable communications. In covert communication networks, only the end nodes are aware of the communication characteristics of the overall path. The most widely used protocols of ad hoc networks was overviewed. The routing protocols of ad hoc networks with trust considerations and select Destination Sequence Routing, a protocol that can be used in distributed ad hoc network settings for path discovery, was also reviewed. It establishes a path through which all packets sent by a source must pass to the destination. The end nodes are responsible for examining the statistics of the received packets and deriving inferences on path feature variations which are used for computing new trust metrics. When a path is judged not trustworthy based on the metrics, the Destination Sequence Routing is informed to undertake a new trusted path discovery between the end points. The thesis added a new feature based on the quality of service parameters of the path to create trust in the links in recognition of attacks.
Poellabauer, Christian. "Q-Fabric: System Support for Continuous Online Quality Management." Diss., Available online, Georgia Institute of Technology, 2004:, 2004. http://etd.gatech.edu/theses/available/etd-04082004-134256/unrestricted/poellabauer%5Fchristian%5F200405%5Fphd.pdf.
Full textPande, Santosh, Committee Member ; Pu, Calton, Committee Member ; Schwan, Karsten, Committee Chair ; Franke, Hubertus, Committee Member ; Eisenhauer, Greg, Committee Member. Vita. Includes bibliographical references (leaves 158-169).
Payandehjoo, Kasra. "Study of nonlinear transmission lines and their applications." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=99785.
Full textIn this thesis, a comprehensive study of NLTLs and their applications is presented. Sharpening of the edges of electrical pulses, voltage dependent true time delay, and harmonic generation in NLTLs are investigated through analytical studies as well as circuit simulations and experimental measurements. Designing the best possible mixers, frequency doublers, and edge sharpeners and optimizing them are not the objects of this thesis. The main objective is to study an alternative design approach by using NLTLs. To this end, analytical solution for the magnitude of the third harmonic along a nonlinear transmission line is derived for the first time. Also, for the first time the lowpass nature of the NLTL is combined with the solutions for the magnitudes of harmonics in order to improve the validity range of the predicted harmonics. An NLTL harmonic generator is fabricated and measurement results are reported.
Inspired by the distributed nature of nonlinear transmission lines, a novel filtering method is introduced for the suppression of the unwanted signals in different NLTL applications. The filtering method is applied to a nonlinear transmission line frequency multiplier in order to filter the third harmonic. The distributed filtering is also used to suppress the image signal in an NLTL mixer. The proposed filtering method is general and can be applied to other periodic structure as well (such as distributed amplifiers and distributed mixers). For implementing the filtering, compact complementary split ring resonators are proposed and designed for an NLTL frequency doubler.
Van, Wyk Hendrik Petrus Daniel. "Design and construction of a modem for satellite use." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/86580.
Full textENGLISH ABSTRACT: In this thesis the design and testing of the baseband components of a modem intended for use as a telemetry and control link for a low earth orbit satellite is presented. This includes parts of the physical layer as well as a basic data-link layer. Binary phase-shift keying (BPSK) is used as the modulation scheme and is realised by making use of software defined radio on a standard x86 computer with digital to analogue and analogue to digital converters that use a universal serial bus (USB) connection. The data-link layer makes use of a basic framing scheme and provides bit synchronisation, an automatic repeat request (ARQ) system and Bose Chaudhuri Hocquenghem (BCH) forward error correction (FEC). The ARQ system ensures that data is delivered reliably and the FEC improves the system’s performance in noisy conditions. A prototype system was developed to test the performance of the individual layers as well as the system as a whole. For testing purposes the Linux Internet Protocol (IP) stack is used as higher network layers. Radio frequency hardware developed by Verschaeve [1] modulates the signal away from baseband, transmits it over the air and receives it.
AFRIKAANSE OPSOMMING: In hierdie tesis word die ontwerp en toetsing van die basisband komponente van ‘n modem, bedoel vir gebruik op ‘n satelliet in ‘n lae-aarde wentelbaan, bespreek. Die ontwerp sluit dele van die fisiese vlak sowel as ‘n verbindingsvlak in. Binêre faseskuifsleuteling word gebruik as die modulasieskema en word verwesenlik deur gebruik te maak van sagteware gedefinieerde radio. Dit voer uit op ’n standaard x86 rekenaar wat deur middel van USB gekoppel is aan ’n digitaal-na-analoog- en ’n analoog-na-digitaal-omsetter. Die verbindingsvlak het ‘n eenvoudige ramingskema. Dit voorsien bis sinkronisasie, die hersending van verlore rame en Bose Chaudhuri Hocquenghem (BCH) voorwaartse foutverbetering. Die hersending van verlore rame verseker dat data betroubaar oorgedra kan word en foutverbetering verbeter die stelsel se vermoëns in ruiserige toestande. ‘n Prototipe stelsel is ontwikkel om die vermoëns van die individuele vlakke, sowel as die stelsel as ’n geheel, te toets. Tydens toetsing is die Linux Internet Protokol stapel gebruik vir die hoër netwerk vlakke. Radio komponente wat deur Verschaeve [1] ontwikkel was is gebruik om die sein uit te saai en te ontvang.
Chen, Lyu-Shi 1958. "EXPERT SYSTEM FOR BROADBAND NETWORK CABLE PLANT DESIGN." Thesis, The University of Arizona, 1987. http://hdl.handle.net/10150/276490.
Full textNguyen, Son. "Capacity and Throughput Optimization in Multi-cell 3G WCDMA Networks." Thesis, University of North Texas, 2005. https://digital.library.unt.edu/ark:/67531/metadc4948/.
Full textZuo, Yiying 1974. "Design, analysis, and implementation of multi-port refraction based electro-optic switches." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=103035.
Full textAlthough rectangular geometry is extensively employed in EO devices, nonrectangular scanners have demonstrated better deflection performance. Two new nonrectangular geometries capable of further enhancing the deflection performance of EO beam scanners, proposed in this dissertation, were constructed. Their parabola and half-horn geometries provide 2-3 degrees of steering, which is 2-3 times greater than the steering provided by rectangular deflectors.
EO deflectors based on the parabola and the half-horn geometries, which can provide larger deflection angles, were built. These devices demonstrated a deflection angle of 3.1°, less than 5 dB of insertion loss from fiber to fiber, and -40 dB of crosstalk.
Two packaged optical switches using rectangular EO deflectors were demonstrated. By combining these EO deflectors with fiber collimators and high voltage packaging, high speed optical switches were built and characterized. The switch design was based on a 500mum z-cut LiTaO3 single crystal wafer fabricated using the domain inversion method. The 1x2 switch had a maximum deflection angle of 1.22° with an applied voltage of 1.1 kV and the 1x4 switch had a maximum deviation angle of 2.14°, with an applied voltage of 1 kV. The average insertion loss and crosstalk figures were 2.36 dB and -36 dB, respectively. The worst case switching time was 86 ns.
Altunbasak, Hayriye Celebi. "Layer 2 security inter-layering in networks." Diss., Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-11172006-130414/.
Full textWardi, Yorai, Committee Member ; Abler, Randy, Committee Member ; Copeland, John, Committee Member ; Owen, Henry, Committee Chair ; Ahamad, Mustaque, Committee Member.
Kilicoglu, Nezaket. "Construction Of An Experimental Radar System." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612760/index.pdf.
Full textXie, Jiang (Linda). "Mobility Management in Next Generation All-IP Based Wireless Systems." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/5190.
Full textChen, Bosi. "Spectrum Regrowth for OFDM-based LTE and WIMAX Systems." PDXScholar, 2013. https://pdxscholar.library.pdx.edu/open_access_etds/601.
Full textМошинська, Аліна Валентинівна. "Стратегії передачі інформації в мультисервісних телекомунікаційних системах." Doctoral thesis, Київ, 2020. https://ela.kpi.ua/handle/123456789/34482.
Full textde, Paula Andes. "Dynamics of corporate strategy from a value chain perspective : A study of the Swedish telecom and construction industries during the 90’s." Doctoral thesis, Linköping University, Linköping University, Industrial Marketing and Industrial Economics, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-7252.
Full textChanges in sectors and industries have brought new challenges to corporations as well as been important driving forces for the dynamics in strategy at the corporate level. With the dramatic developments of the 1990’s in mind, such as multilateral free-trade agreements, liberalization, privatization, sharp industry growth/decline, increased competition and globalization, in particular within the telecom and the construction industry, this study contributes to describing and understanding strategic change at the corporate level as well as changes in the division of work within value chains. Strategy is defined as intentions, decisions and actions that relate to bundling and unbundling at different strategic levels, aiming to establish and reestablish a value chain position. Thus, outsourcing, M&As, modularization and systems development and sales are important strategic components which are examined from a value chain perspective. From a value chain perspective, the purpose of this study is to describe and understand strategic change at the corporate level in the telecom and construction industries during the 1990’s. More specifically this study shall contribute to describing and understanding (i) the dynamics of and between M&As, outsourcing, modularization and systemization, as well as (ii) industrial and financial drivers to strategic change.
The conclusions describe strategic change from a value chain perspective using three descriptive patterns, including an increasing degree of specialization and need for interorganizational coordination across the value chain. In addition, outsourcing and modularization of systems and an increased scope of offering through systemization and BOT-projects, result in the fact that due to M&As the horizontal boundary of the firm sometimes goes beyond the industry scope while the vertical scope is often narrowed through outsourcing. The conclusions also focus on understanding the content of strategic change, that is to say the dynamics of and between mergers and acquisitions, outsourcing, modularization and system sales. These findings are summarized in nine explanatory patterns. These patterns show that the strategic decisions of bundling and unbundling at the corporate and functional level through mergers and acquisitions, outsourcing, systemization and modularization are guided by an industrial as well as a financial logic. By considering the descriptive and explanatory patterns found this study, the conclusions also include what to expect during the next decade with regard to corporate strategy from a value chain perspective in five predictive patterns.
Pangalos, Panagiotis George. "Private telecommunications systems a systems approach /." Thesis, Monterey, California : Naval Postgraduate School, 1990. http://handle.dtic.mil/100.2/ADA241036.
Full textThesis Advisor(s): Shu, Myung W. ; Gates, William. "September 1990." Description based on title screen as viewed on December 17, 2009. DTIC Identifier(s): Voice Communications, Data Communications, Private Telecommunication Systems, Theses. Author(s) subject terms: Private Telecommunications systems, Computerized Private Branch Exchanges (CPBXs), Request of Proposals (RFP), Life Cycle Costing (LLC). Includes bibliographical references (p. 100-101). Also available in print.
Pointon, Craig T. "Nonlinear dynamics in telecommunication systems." Thesis, Staffordshire University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282553.
Full textStergiou, Theodore. "Protocol security for third generation telecommunication systems." Thesis, University of Warwick, 2003. http://wrap.warwick.ac.uk/3023/.
Full textDelivasilis, Dimitrios L. "Data security for third generation telecommunication systems." Thesis, University of Warwick, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.404694.
Full textYeo, Yong-Kee. "Dynamically Reconfigurable Optical Buffer and Multicast-Enabled Switch Fabric for Optical Packet Switching." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/14615.
Full textGonzalez, Prieto Alberto. "Adaptive management for networked systems." Licentiate thesis, Stockholm : School of electrical engineering, KTH, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4022.
Full textKozak, Nadine Irène. "On the last mile the effects of telecommunications regulation and deregulation in the rural western United States and Canada /." Diss., [La Jolla] : University of California, San Diego, 2010. http://wwwlib.umi.com/cr/ucsd/fullcit?p3390098.
Full textTitle from first page of PDF file (viewed Feb. 22, 2010). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 421-450).
Archambault, Eric J. A. "Inventors, entrepreneurs and the metamorphosis of telecommunication systems." Thesis, University of Sussex, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318614.
Full textChiurco, Giovanni <1982>. "Cooperative and reconfigurable telecommunication systems based on FPGA." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2011. http://amsdottorato.unibo.it/3466/.
Full textPetropoulos, Periklis. "Novel techniques and materials for optical telecommunication systems." Thesis, University of Southampton, 2000. https://eprints.soton.ac.uk/15506/.
Full textShi, Ming Hao. "Research and realization on virtual roaming based 3D scene construction of ancient architectures." Thesis, University of Macau, 2017. http://umaclib3.umac.mo/record=b3691584.
Full textBarghouthi, Ramzi. "Sequence acquisition for DS/CDMA communication systems." Diss., Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/15435.
Full textMcCormack, Andrew. "A business continuity solution for telecommunications billing systems." [Denver, Colo.] : Regis University, 2008. http://165.236.235.140/lib/AMcCormack2008.pdf.
Full textBergman, Svante. "Bit loading and precoding for MIMO communication systems." Doctoral thesis, Stockholm : Skolan för elektro- och systemteknik, Kungliga Tekniska högskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10622.
Full textJohansson, Björn. "Distributed resource allocation in networked systems using decomposition techniques." Licentiate thesis, KTH, School of Electrical Engineering (EES), 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4096.
Full textThe Internet and power distribution grids are examples of ubiquitous systems that are composed of subsystems that cooperate using a communication network. We loosely define such systems as networked systems. These systems are usually designed by using trial and error. With this thesis, we aim to fill some of the many gaps in the diverse theory of networked systems. Therefore, we cast resource allocation in networked systems as optimization problems, and we investigate a versatile class of optimization problems. We then use decomposition methods to devise decentralized algorithms that solve these optimization problems.
The thesis consists of four main contributions: First, we review decomposition methods that can be used to devise decentralized algorithms for solving the posed optimization problems. Second, we consider cross-layer optimization of communication networks. Network performance can be increased if the traditionally separated network layers are jointly optimized. We investigate the interplay between the data sending rates and the allocation of resources for the communication links. The communication networks we consider have links where the data transferring capacity can be controlled. Decomposition methods are applied to the design of fully distributed protocols for two wireless network technologies: networks with orthogonal channels and network-wide resource constraints, as well as wireless networks using spatial-reuse time division multiple access. Third, we consider the problem of designing a distributed control strategy such that a linear combination of the states of a number of vehicles coincide at a given time. The vehicles are described by linear difference equations and are subject to convex input constraints. It is demonstrated how primal decomposition techniques and incremental subgradient methods allow us to find a solution in which each vehicle performs individual planning of its trajectory and exchanges critical information with neighbors only. We explore various communication, computation, and control structures. Fourth, we investigate the resource allocation problem for large-scale server clusters with quality-of-service objectives, in which key functions are decentralized. Specifically, the problem of selecting which services the servers should provide is posed as a discrete utility maximization problem. We develop an efficient centralized algorithm that solves this problem, and we propose three suboptimal schemes that operate with local information.
Bria, Aurelian. "Hybrid cellular-broadcasting infrastructure systems : radio resource management issues." Licentiate thesis, Stockholm, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3922.
Full textAladeloba, Abisayo Olufemi. "Optically amplified free-space optical communication systems." Thesis, University of Nottingham, 2013. http://eprints.nottingham.ac.uk/13304/.
Full textSun, Yuhao. "Power optimised narrowband power-line communication systems." Thesis, University of Cambridge, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.648110.
Full textGürbüz, Özgür. "Power control based QoS provisioning for wireless multimedia networks." Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/14888.
Full textBowman, W. Stevenson. "Communication module for the micro-based small purchase contracting program." Thesis, Monterey, Calif. : Naval Postgraduate School, 1992. http://handle.dtic.mil/100.2/ADA250092.
Full textThesis Advisors: Matsushima, Rodney ; Sengupta, Kishore. "March, 1992." Description based on title screen as viewed on March 4, 2009. Includes bibliographical references (p. 270-271). Also available in print.
Balasubramaniyan, Vijay A. "Effective identities for trusted interactions in converged telecommunication systems." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/44920.
Full textTanir, Oryal. "Specification driven architectural modelling environment for telecommunication systems synthesis." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=28537.
Full textWhile design automation has helped in reducing design time-lines and design churn, a major source of design difficulties is just recently being addressed and promise to be the next wave in design automation applicability. The problems arise within the architectural (or system) level of abstraction very early in the design cycle. The recent research in this field attempts to bridge the design process gap between specification and design, and provides a platform for experimenting with hardware and software trade-offs.
This dissertation studies the requirements for an environment for architectural design. In particular, an environment specific to the telecommunications domain is proposed in order to limit the potentially large design exploration space. An intermediate design language is also introduced to accommodate both high level modelling and synthesis driven by the user and environment. Finally a Design Analysis and Synthesis Environment (DASE) is described to facilitate the architectural level activities. The environment, a proof of concept, provides generic modal library, simulation, synthesis and Petri-net analysis support. Realistic design examples are explored, to illustrate architectural design activities with the environment.
Hess, Rolando. "Ultrafast all-optical time demultiplexer for optical telecommunication systems /." Zürich, 1998. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=12525.
Full textFischer, Stefan. "Versatile all-optical interferometric switch for optical telecommunication systems /." Zürich, 2000. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=13836.
Full textMarburger, André [Verfasser]. "Reverse Engineering of Complex Legacy Telecommunication Systems / André Marburger." Aachen : Shaker, 2005. http://d-nb.info/1186580232/34.
Full textBorg, Andreas. "Processes and Models for Capacity Requirements in Telecommunication Systems." Doctoral thesis, Linköping : Department of Computer and Information Science, Linköpings universitet, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-16932.
Full textBarannik, Vlad, Y. Babenko, S. Shulgin, and M. Parkhomenko. "Video encoding to increase video availability in telecommunication systems." Thesis, Taras Shevchenko National University of Kyiv, 2020. https://openarchive.nure.ua/handle/document/16582.
Full textKhanna, Yogesh. "Requirements analysis of federal governments international telecommunications services." Master's thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-02022010-020111/.
Full textCheema, Kanwarpreet Singh. "Synthesis of serial communications controller using higher abstraction level derivation (HALD) model /." [St. Lucia, Qld.], 2001. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16309.pdf.
Full textChien, Tien-chen. "Technical competency needs assessment for the graduates of telecommunication systems at UW-Stout." Online version, 1999. http://www.uwstout.edu/lib/thesis/1999/1999chien.pdf.
Full textSvedman, Patrick. "Cross-layer Aspects in OFMDA Systems : Feedback, Scheduling and Beamforming." Doctoral thesis, KTH, Signalbehandling, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4429.
Full textQC 20100819
Fu, Jing. "Design and evaluation of network processor systems and forwarding applications." Licentiate thesis, KTH, School of Electrical Engineering (EES), 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4248.
Full textDuring recent years, both the Internet traffic and packet transmission rates have been growing rapidly, and new Internet services such as VPNs, QoS and IPTV have emerged. To meet increasing line speed requirements and to support current and future Internet services, improvements and changes are needed in current routers both with respect to hardware architectures and forwarding applications. High speed routers are nowadays mainly based on application specific integrated circuits (ASICs), which are custom made and not flexible enough to support diverse services. Generalpurpose processors offer flexibility, but have difficulties to in handling high data rates. A number of software IP-address lookup algorithms have therefore been developed to enable fast packet processing in general-purpose processors. Network processors have recently emerged to provide the performance of ASICs combined with the programmability of general-purpose processors.
This thesis provides an evaluation of router design including both hardware architectures and software applications. The first part of the thesis contains an evaluation of various network processor system designs. We introduce a model for network processor systems which is used as a basis for a simulation tool. Thereafter, we study two ways to organize processing elements (PEs) inside a network processor to achieve parallelism: a pipelined and a pooled organization. The impact of using multiple threads inside a single PE is also studied. In addition, we study the queueing behavior and packet delays in such systems. The results show that parallelism is crucial to achieving high performance,but both the pipelined and the pooled processing-element topologies achieve comparable performances. The detailed queueing behavior and packet delay results have been used to dimension queues, which can be used as guidelines for designing memory subsystems and queueing disciplines.
The second part of the thesis contains a performance evaluation of an IP-address lookup algorithm, the LC-trie. The study considers trie search depth, prefix vector access behavior, cache behavior, and packet lookup service time. For the packet lookup service time, the evaluation contains both experimental results and results obtained from a model. The results show that the LC-trie is an efficient route lookup algorithm for general-purpose processors, capable of performing 20 million packet lookups per second on a Pentium 4, 2.8 GHz computer, which corresponds to a 40 Gb/s link for average sized packets. Furthermore, the results show the importance of choosing packet traces when evaluating IP-address lookup algorithms: real-world and synthetically generated traces may have very different behaviors.
The results presented in the thesis are obtained through studies of both hardware architectures and software applications. They could be used to guide the design of next-generation routers.
Hammarwall, David. "Resource Allocation in Multi-Antenna Communication Systems with Limited Feedback." Doctoral thesis, Stockholm : Kungliga Tekniska högskolan, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4487.
Full textLau, Siu Lik. "Reliability of optical crossconnect systems /." View abstract or full-text, 2004. http://library.ust.hk/cgi/db/thesis.pl?ELEC%202004%20LAUS.
Full textIncludes bibliographical references (leaves 73-76). Also available in electronic version. Access restricted to campus users.
Yunus, Muhammad Naim. "Blocking in teletraffic systems under nonstationary arrival and service conditions /." Title page, contents and summary only, 1985. http://web4.library.adelaide.edu.au/theses/09PH/09phy95.pdf.
Full textWuhib, Fetahi Zebenigus. "Real-Time Monitoring of Global Variables in Large-Scale Dynamic Systems." Licentiate thesis, Stockholm : Kommunikationsnät, Communication Networks, Kungliga Tekniska högskolan, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4646.
Full textAntonopoulos, Andreas. "Planning telecommunication transport networks : metrication, analysis and design." Thesis, University College London (University of London), 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287551.
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