Dissertations / Theses on the topic 'Mobile communication systems – Mathematical models'
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Sadeghi, Parastoo School of Electrical Engineering And Telecommunications UNSW. "Modelling, information capacity, and estimation of time-varying channels in mobile communication systems." Awarded by:University of New South Wales. School of Electrical Engineering And Telecommunications, 2006. http://handle.unsw.edu.au/1959.4/32310.
Full textRohani, Mehdiabadi Behrooz. "Power control for mobile radio systems using perceptual speech quality metrics." University of Western Australia. School of Electrical, Electronic and Computer Engineering, 2007. http://theses.library.uwa.edu.au/adt-WU2007.0174.
Full textPatel, Chirag S. "Wireless channel modeling, simulation, and estimation." Diss., Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-03282006-200818/.
Full textAndrew, Alfred, Committee Member ; Durgin, Gregory, Committee Member ; Li, Geoffrey, Committee Member ; Ingram, Mary Ann, Committee Member ; Stuber, Gordon, Committee Chair.
Bradley, W. Scott. "Propagation modeling for land mobile satellite communications." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/74511.
Full textMaster of Science
Heo, Deukhyoun. "Silicon MOS field effect transistor RF/Microwave nonlinear model study and power amplifier development for wireless communications." Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/15618.
Full textTufekcioglu, Refik. "Communication models in mobile computing systems and mobile agents." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2000. http://handle.dtic.mil/100.2/ADA378775.
Full textThesis advisor(s): Michael, James B. "March 2000." Includes bibliographical references (p. 131-137). Also available in print.
Kwok, Wing Pong William. "A variety of queueing models for mobile communication systems." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0006/MQ46077.pdf.
Full textXu, Benshuai. "Time varying channel models for 5G mobile communication systems." Thesis, University of Greenwich, 2014. http://gala.gre.ac.uk/13270/.
Full textAli, Syed Zahid. "A mathematical programming approach to cellular mobile radio network design." Thesis, Imperial College London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269005.
Full textMa, Chunyan. "Mathematical security models for multi-agent distributed systems." CSUSB ScholarWorks, 2004. https://scholarworks.lib.csusb.edu/etd-project/2568.
Full textHou, Yuen Tan. "Resource management in multimedia communication systems." HKBU Institutional Repository, 2003. http://repository.hkbu.edu.hk/etd_ra/478.
Full textButgereit, Laura Lee. "A model for automated topic spotting in a mobile chat based mathematics tutoring environment." Thesis, Nelson Mandela Metropolitan University, 2012. http://hdl.handle.net/10948/d1013741.
Full textAlparslan, Denizhan N. Sohraby Khosrow. "Modeling and analysis of generalized random mobility models for wireless ad hoc networks." Diss., UMK access, 2005.
Find full text"A dissertation in telecommunication networking and computer networking." Advisor: Khosrow Sohraby. Typescript. Vita. Title from "catalog record" of the print edition Description based on contents viewed May 30, 2006. Includes bibliographical references (leaves 119-123). Online version of the print edition.
Sail, Siddharth Subhash. "On the applicability of random mobility models for swarm robot movements /." Online version of thesis, 2007. http://hdl.handle.net/1850/3939.
Full textMin, Rui, and 闵瑞. "Channel estimation and data detection of OFDM systems under unknown channel order doppler frequency: from point-to-point to relaying systems." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B47323930.
Full textpublished_or_final_version
Electrical and Electronic Engineering
Master
Master of Philosophy
Li, Xiao, and 李驍. "Channel estimation and timing synchronization in cooperative communication systems." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2009. http://hub.hku.hk/bib/B42841835.
Full textLazaro, de Barrio Oscar. "Dynamic radio resource management algorithms and traffic models for emerging mobile communication systems." Thesis, University of Strathclyde, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248855.
Full textBörjesson, Maria. "Communication technology and travel demand models." Licentiate thesis, KTH, Infrastructure, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-1640.
Full textTransportation planners have traditionally focused onphysical travel only, and disregarded the fact that other modesof communication may influence travel demand. However, moderntelecommunications are rapidly increasing the accessibility toactivities that previously only could be reached by physicaltransportation. This development calls for methods to analyseinteractions between telecommunications and transport systems.The objective of this thesis is to accomplish a betterunderstanding of if and how impacts of information technologycould be implemented in travel demand models. An important partof this issue is to investigate what kind of data that isneeded.
This thesis also aims at investigating whether theCommunication Survey, KOM, collected by Swedish Institute forTransport and Communications, SIKA, can be used to improvetransport modelling with respect to how moderntelecommunications influence travel demand. KOM is a one-daytravel and communication diary survey, including information onthe respondents telecommuting habits as well as socio-economicstatus. One problem was the small sample size in KOM, whichmade the analyses uncertain. Since KOM is collected on a yearlybasis, it is still possible to apply similar analysis methodswithin a few years, using a larger data set, which might enableextended analyses. The small sample in KOM available to date isbest suited for general descriptive analyses of communicationpatterns in Sweden. The main conclusions of the paper aretherefore connected to the methods and future datacollection.
The thesis includes three papers. The first paper tested amodel approach that assumes substitution between travel andnon-travel based communication, using the KOM database. Traveldemand models are in general constructed as nested logit modelswith frequency, mode and destination choice levels. In thepaper, non-travel based modes of communication were included inthe choice set of such a model. The non-travel based modes ofcommunication considered were Internet (and e-mail), ordinarymail and telephone contacts. The model was developed for postand bank activities only, since that was the only activity forwhich the numbers of contacts and trips were large enough toallow model estimation. Several conclusions could be drawn.Describing the utility of the non-travel based alternatives isdifficult and needs more research. The analysisis also verysensitive to how activities are defined. It is furtheressential that the data collection is more process orientedthan traditional cross-sectional data is when analysing traveland telecommunications interactions. That is, habits ofperforming particular activities, including both trips anddifferent types of contacts, must be studied. The second andthird papers investigate telecommuting. As a first step toreach the goal of forecasting telecommuting, the second paperexamined the characteristics of current telecommuters by use ofKOM. This was mainly accomplished by estimating a telecommutingadoption model of logit type. However, only 122 employees outof 7578 actually telecommutes full days at home. Thesetelecommuters work primarily in information- and service-basedindustrial sectors concerned with computers, finance orcommunication. The difficulties in describing the utility ofthe telecommunications based alternatives (representingno travel) concerned also the telecommutingadoption model. Also impacts on travel from telecommuting wereinvestigated. Comparing the average commuting distance showedthat employees who exclusively telecommute full days havelonger commuting distances than others, but that othertelecommuters do not have longer average commuting distances.Telecommuting in general does not seem to be influenced by lowaccessibility to the labour market.
The third paper used data collected from a working sitewithin the company Ericsson, located in the office district ofNacka Strand in Stockholm during the autumn 2002. Thetelecommuting frequency was substantially higher at Ericssonthan in the workforce as a whole. The propensity to adopttelecommuting was modelled as a function of socio-economicvariables and access to technical equipment, work tasksuitability and management attitudes, as perceived by theemployees. The focuswas to identify tools that the company canuse to promote telecommuting, and to find incentives for thecompany to promote telecommuting. Technical equipment, suitablework tasks and managers attitude were identified as constraintsfor telecommuting. The employees also perceived that theybecame more efficient and saved time when telecommuting.
Goetz, Marieta. "Mobile business models in African rural communities." Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/2581.
Full textMobile telephone subscription in developing countries has increased by more than 500 percent since 2005, with Africa experiencing the highest growth rate globally. Amongst Africa’s 306.5 million subscribers, recorded in 2008, an unexpectedly high adoption rate of the technology by poor, often illiterate rural communities is observed. Mobile telephony generally provides African rural users access to electronic communication for the first time. Providing access to communication, information and knowledge, mobile phones present a platform for economic and social interaction in rural Africa. The extent of the resulting positive socio-economic impact on the developing world has lead to mobile telephony increasingly being viewed as a potential development tool for the socio-economic upliftment of the rural poor. This thesis is inspired by the potential for value creation to end users of mobile telephony, leading to the proposition that the rapid expansion of mobile telephony in rural Africa can contribute significantly to the sustainability of these communities’ rural livelihoods. For this proposition to be valid, mobile telephony has to provide value beyond being communication tool. It has to provide value in income generating activities by increasing opportunities for access to financial and social capital with mobile business models appropriate to the rural African context. To assess the appropriateness of mobile value offerings, the rural African context was analyzed using the Sustainable Livelihoods Framework. Through multi-level analysis, the challenges and issues that influence the lives of the rural poor were explored and the dominant livelihood strategies in terms of income generating activities were identified. Apart from agricultural income streams, waged labor, migration and micro-entrepreneurial activities provide non-agricultural income streams. Creating an appropriate mobile business ecosystem for rural Africa requires the collaboration of a complex network of actors within a value constellation to co-produce value for the end users. Three conditional factors were identified for mobile telephony and emerging mobile business models to contribute successfully to sustainable livelihoods: adaptation of the technology by providers, user appropriation to make the technology their own and the assimilation of it into their livelihood strategies. These factors were researched for validation through the study of existing literature and reported case studies. It was found that these three conditional factors were unequivocally met. Firstly, the mobile telecommunication industry active in Africa is seen to successfully adapt and innovate solutions that are relevant to African rural communities’ vulnerabilities and livelihood strategies. Secondly, African mobile phone users have successfully adopted and appropriated mobile telephony to create value for themselves in their livelihood strategies, often independent of external interventions. They are claiming ownership of the technology and not merely using it as a communication tool. Thirdly, by assimilating mobile telephony into their livelihood strategies, value-creation within their income generating activities have been made possible. This value creation is impacting users’ social and financial capital positively. This thesis concludes that mobile telephony and emerging mobile business models are contributing to increasing African rural dwellers’ income generating potential, reducing their vulnerability to shocks, and providing them with a voice; thereby contributing to sustainable rural livelihoods.
Bose, Biswojit. "Bit error rate estimation in WiMAX communications at vehicular speeds using Nakagami-m fading model." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2013. https://ro.ecu.edu.au/theses/530.
Full textLee, Wingyee Emily Electrical Engineering & Telecommunications Faculty of Engineering UNSW. "Scheduling real-time traffic in wireless networks." Awarded by:University of New South Wales. Electrical Engineering & Telecommunications, 2007. http://handle.unsw.edu.au/1959.4/40737.
Full textCsinger, Andrew. "Implementing a normative theory of communication in a framework for default reasoning." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/28954.
Full textScience, Faculty of
Computer Science, Department of
Graduate
Pimpalkhare, Mangesh S. "Linearly repeatered communication systems using optical amplifiers." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-05042010-020243/.
Full textZhou, Junyang. "Enhanced signal propagation models and algorithm selector for providing location estimation services within cellular radio networks." HKBU Institutional Repository, 2007. http://repository.hkbu.edu.hk/etd_ra/776.
Full textWong, Ka Wai. "A comparative study and novel heuristic approach for the IEEE 802.16e mobile WiMAX power saving mechanism /." View abstract or full-text, 2009. http://library.ust.hk/cgi/db/thesis.pl?ECED%202009%20WONG.
Full textFung, Victor. "Bit error simulation of FSK, BPSK, and pi/4 DQPSK in flat and frequency-selective fading mobile radio channels using two-ray and measurement- based impulse response models." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-08142009-040410/.
Full textMateyisi, Mohau Jacob. "Polymer networks with mobile force-applying crosslinks." Thesis, Stellenbosch : University of Stellenbosch, 2011. http://hdl.handle.net/10019.1/6759.
Full textENGLISH ABSTRACT: We construct and study a simple model for an active gel of exible polymer filaments crosslinked by a molecular motor cluster that perform reversible work while translating along the filaments. The filament end points are crosslinked to an elastic background. In this sense we employ a simplified model for motor clusters that act as slipping links that exert force while moving along the strands. Using the framework of replica theory, quenched averages are taken over the disorder which originates from permanent random crosslinking of network end points to the background. We investigate how a small motor force contributes to the elastic properties of the network. We learn that in addition to the normal elastic response for the network there is an extra contribution to the network elasticity from the motor activity. This depends on the ratio of the entropic spring constant for the linked bio-polymerchain to the spring constant of the tether of the motor.
AFRIKAANSE OPSOMMING: Ons konstrueer en bestudeer 'n eenvoudige model vir 'n aktiewe netwerk van eksieble polimeerfilamente wat deur grosse van molekulere motors aan mekaar verbind word wat omkeerbare werk doen terwyl dit langs die filamente transleer. Die eindpunte van die filamente is aan 'n elastiese agtergrond verbind. In hierdie sin benut ons 'n eenvoudige model vir motorclusters wat as verskuifbare verbindings krag op die filamente tydens beweging kan uitoefen. Nie-termiese wanorde gemiddeldes word geneem oor die wanorde wat deur die lukrake permanente verbindings van netwerk eindpunte aan die agtergrond veroorsaak word. Ons ondersoek hoe 'n klein motorkrag tot die elastiese eienskappe van die netwerk bydra. Ons leer dat daar bo en behalwe die gewone elastiese respons vir die netwerk 'n elastiese bydrae as gevolg van die motors se aktiwiteit voorkom. Dit hang af van die verhouding van die entropiese veerkonstante van die biopolimerketting tot die veerkonstante van die anker van die motor.
Alla, Sindhu. "A Study of Mobility Models based on Spatial Node Distribution and Area Coverage." Thesis, University of North Texas, 2017. https://digital.library.unt.edu/ark:/67531/metadc984231/.
Full textCuvelliez, Charles. "Etudes des modèles d'implémentation des opérateurs de réseaux mobiles virtuels." Doctoral thesis, Universite Libre de Bruxelles, 2006. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210895.
Full textHosting MVNOs, supporting them from both operational and commercial perspectives are new challenges for the mobile operators: they have to set up a specific internal organization because they used to be a vertically integrated industrial structure. All of this represents tremendous changes for them.
This thesis describes first the strategic models for hosting MVNOs. The regulatory aspects, that are an essential driver for the liberalization of network economies, are then analyzed. The key point is: are the MVNO able to increase the efficiency and competitiveness of mobile markets.
Another important aspect is the modelling of a mobile network: the MVNOs will use some components while other components are unuseful for them. Without such model, it is impossible to derive the right costs and price to be charged to the MVNO in order to have a win win industrial model for both the MVNO and its hosting operator.
A case study of a corporate MVNO focusing on needs of multinationals is analyzed. Such case study describes all the steps for an economic actor to become MVNO from scratch. Such MVNO are not yet present although there is a market demand.
The last chapter makes a comparative study of the MVNO markets in the European Union.
Cette étude aborde le phénomène des opérateurs de réseaux mobiles virtuels ;il s’agit d’acteurs économiques - parfois sans lien aucun avec les télécommunications - qui louent le réseau d’opérateurs mobiles ;ils deviennent à leur tour opérateurs à part entière au point de devenir concurrent non seulement des autres opérateurs mobiles mais aussi de l’opérateur mobile qui leur a loué une partie de son réseau.
L’hébergement technique de l’opérateur virtuel, son support opérationnel et commercial, l’organisation que doit mettre en place l’opérateur mobile pour héberger son opérateur virtuel afin de partager avec lui son réseau sont des nouveaux défis auxquels les opérateurs mobiles, habitués à être des structures industrielles totalement intégrées verticalement, font face pour la première fois.
Cette étude traite des modèles d’implémentation des opérateurs de réseaux mobiles virtuels :elle aborde d’abord les aspects stratégiques qui fixent le cadre pour les opérateurs mobiles qui veulent ou sont forcés à héberger des opérateurs virtuels. Les aspects réglementaires, une composante essentielle des économies de réseaux en voie de libéralisation, sont ensuite étudiés, en particulier, comment les opérateurs virtuels peuvent contribuer à améliorer la compétitivité et la libéralisation de ces marchés.
L’étude modélise ensuite le réseau d’un opérateur mobile de façon à mettre en évidence les éléments à partager qui seront utilisés par l’opérateur virtuel. Cette modélisation est essentielle pour déterminer le coût de l’hébergement et du partage du réseau de façon à créer les conditions de rentabilité de ce modèle d’opérateur virtuel.
On aborde enfin un cas d’étude d’un candidat à devenir opérateur de réseau mobile virtuel qui souhaite répondre à la demande transnationale des grandes entreprises. Ce type d’opérateur virtuel est encore inexistant de nos jours.
Enfin, nous terminons par une étude comparée de la situation des opérateurs mobiles virtuels à travers l’Union Européenne.
Doctorat en sciences appliquées
info:eu-repo/semantics/nonPublished
McGarvey, Brian Scott. "Coupling of Solid-State and Electromagnetic Equations for the Computationally Efficient Time-Domain Modeling and Design of Wireless Packaged Geometries with NonlinearActive Devices." Thesis, Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/14551.
Full textPirkl, Ryan J. "Measurement-based investigations of radio wave propagation: an exposé on building corner diffraction." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/33961.
Full textFulton, Neale Leslie Aerospace & Mechanical Engineering Australian Defence Force Academy UNSW. "Regional airspace design: a structured systems engineering approach." Awarded by:University of New South Wales - Australian Defence Force Academy. School of Aerospace and Mechanical Engineering, 2002. http://handle.unsw.edu.au/1959.4/38722.
Full textNtinda, Maria Ndapewa. "Web-based M-learning system for ad-hoc learning of mathematical concepts amongst first year students at the University of Namibia." Thesis, Rhodes University, 2014. http://hdl.handle.net/10962/d1013174.
Full textPendyala, Chandra Mohan. "On the optimal location of transmitters for micro-cellular radio communication system design." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-07112009-040406/.
Full textNsoh, Stephen Atambire. "Resource allocation in WiMAX mesh networks." Thesis, Lethbridge, Alta. : University of Lethbridge, Dept. of Mathematics and Computer Science, c2012, 2012. http://hdl.handle.net/10133/3371.
Full textix, 77 leaves : ill. ; 29 cm
Yan, Zhaohui. "Performance Analysis of A Banyan Based ATM Switching Fabric with Packet Priority." PDXScholar, 1995. https://pdxscholar.library.pdx.edu/open_access_etds/5199.
Full textNiezen, Gerrit. "The optimization of gesture recognition techniques for resource-constrained devices." Diss., Pretoria : [s.n.], 2008. http://upetd.up.ac.za/thesis/available/etd-01262009-125121/.
Full textSrirattana, Nuttapong. "High-Efficiency Linear RF Power Amplifiers Development." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/6899.
Full textMoritz, Guilherme Luiz. "Comunicação cooperativa com codificação de rede e transferência sem fio de energia." Universidade Tecnológica Federal do Paraná, 2015. http://repositorio.utfpr.edu.br/jspui/handle/1/1369.
Full textIn this work, we consider a multiuser cooperative wireless network where multiple energy-constrained sources have independent information to transmit to a common destination. The destination, which is assumed to be externally powered, is responsible for transferring energy wirelessly to the sources. The total amount of harvested energy is a function of instantaneous channel conditions. In this scenario, a time-switching protocol is developed where in a fraction of time the sources harvest energy and then use this energy to transmit information. Using the outage probability as a metric, we evaluate the performance of some energy transfer cooperative protocols, namely: energy transfer decode-and-forward (EDF), energy transfer network coding cooperation (ENC) and energy transfer generalized network coding cooperation (EGNC). We obtain a closed-form approximation for the system outage probability, as well as an approximation for the optimal energy transfer period that minimizes such outage probability showing that EGNC protocol presents the best performance among the considered protocols and when compared with the direct transmission. Numerical results are also presented to validate the theoretical results. Finally, suggestions about future works are presented.
Delangre, Olivier. "Caractérisation et modélisation du canal radio en chambre réverbérante." Thesis, Universite Libre de Bruxelles, 2008. http://www.theses.fr/2008LIL10144/document.
Full textThe subject of this thesis is the evaluation of the wireless channel model inside a reverberation chamber. A reverberation chamber is a metallic cavity with a mechanical stirrer whose aim is to stir the electric and magnetic fields inside the chamber. The main advantage of a reverberation chamber for channel modelling purpose is its ability to create an unlimited number of channel realizations. A complete characterization of the channel model is investigated in the three main dimensions (time, frequency and position). A theoretical and experimental approach (in 3 different reverberation chambers) is provided. Then a channel model is proposed. The focus is on multiple antennas systems. Their main characteristic is to take advantage of the three dimensions (including space). A full MIMO channel model is thus proposed and validated. Then, a measurement campaign in a car is compared with the measurements and the theory of the reverberation chamber. An OFDM and SC-FDE transmission scheme are applied on the previously developed channel model inside a reverberation chamber. The results are compared with a classical channel model. Finally, a new testbed is discussed. It is made of two reverberation chambers coupled through a waveguide whose transverse dimensions can be changed. The main advantage of this testbed is its ability to control the degree of freedom of the channel
De, Vega Rodrigo Miguel. "Modeling future all-optical networks without buffering capabilities." Doctoral thesis, Universite Libre de Bruxelles, 2008. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210455.
Full textIn the first part we introduce the basic functionality and structure of OBS and OPS networks. We identify the blocking probability as the main performance parameter of interest.
In the second part we study the statistical properties of the traffic that will likely run through these networks. We use for this purpose a set of traffic traces obtained from the Universidad Politécnica de Catalunya. Our conclusion is that traffic entering the optical domain in future OBS/OPS networks will be long-range dependent (LRD).
In the third part we present the model for bufferless OBS/OPS networks. This model takes into account the results from the second part of the thesis concerning the LRD nature of traffic. It also takes into account specific issues concerning the functionality of a typical bufferless packet-switching network. The resulting model presents scalability problems, so we propose an approximative method to compute the blocking probability from it. We empirically evaluate the accuracy of this method, as well as its scalability.
Doctorat en Sciences de l'ingénieur
info:eu-repo/semantics/nonPublished
"Improving mobile localization in wireless networks." Thesis, 2010. http://library.cuhk.edu.hk/record=b6075247.
Full textIn the first part of this thesis, we present a theoretical analysis of localization using NLOS radio signals, and show that the above-mentioned assumption would no longer be valid when the mobile user is located outside the convex hull of the underlying beacons. As a result, existing NLOS identification methods, as well as many localization approaches, could perform poorly. Extensive experiments on different wireless networks demonstrate that NLOS in localization and the localization error caused by NLOS have been greatly underestimated in previous studies. In the second part, we propose a general location verification scheme to identify malicious beacons. It employs a node-to-node approach for location estimation, and could use different measurement techniques; moreover, it supports secure location verification in sparse networks. The proposed verification scheme has been shown able to achieve satisfactory performance via extensive real world GPS-based wireless sensor network experiments. In the third part, we present a mobility enhanced localization (MEL) scheme. By introducing the user's mobility information into the localization process, the proposed MEL can work in the area where current mobile localization systems cannot locate a mobile user for not having enough beacons. Extensive real world GPS experimental results demonstrate the superiority of the proposed MEL scheme. With the proposed solutions to the above problems, we could obtain improved mobile localization.
Liu, Dawei.
Adviser: Moon-Chuen Lee.
Source: Dissertation Abstracts International, Volume: 73-03, Section: B, page: .
Thesis (Ph.D.)--Chinese University of Hong Kong, 2010.
Includes bibliographical references (leaves 90-97).
Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web.
Electronic reproduction. [Ann Arbor, MI] : ProQuest Information and Learning, [201-] System requirements: Adobe Acrobat Reader. Available via World Wide Web.
Abstract also in Chinese.
Samarasinghe, Prasad Talpawila Kankanamge Don Aruna. "Mobile to mobile channel modelling for wireless communications." Phd thesis, 2014. http://hdl.handle.net/1885/156305.
Full text"On optimization of the resource allocation in multi-cell networks." 2009. http://library.cuhk.edu.hk/record=b5894075.
Full textThesis (M.Phil.)--Chinese University of Hong Kong, 2009.
Includes bibliographical references (p. 58-62).
Abstract in English only.
Abstract --- p.i
Acknowledgement --- p.iii
Chapter 1 --- Introduction --- p.1
Chapter 1.1 --- Motivation --- p.1
Chapter 1.2 --- Literature Review --- p.5
Chapter 1.3 --- Contributions Of This Thesis --- p.7
Chapter 1.4 --- Structure Of This Thesis --- p.8
Chapter 2 --- Problem Formulation --- p.9
Chapter 2.1 --- The JBAPC Problem --- p.9
Chapter 2.2 --- The Single-Stage Reformulation --- p.12
Chapter 3 --- The BARN Algorithm --- p.15
Chapter 3.1 --- Preliminary Mathematics --- p.15
Chapter 3.1.1 --- Duality Of The Linear Optimization Problem --- p.15
Chapter 3.1.2 --- Benders Decomposition --- p.18
Chapter 3.2 --- Solving The JBAPC Problem Using BARN Algorithm --- p.21
Chapter 3.3 --- Performance And Convergence --- p.24
Chapter 3.3.1 --- Global Convergence --- p.26
Chapter 3.3.2 --- BARN With Error Tolerance --- p.26
Chapter 3.3.3 --- Trade-off Between Performance And Convergence Time --- p.26
Chapter 4 --- Accelerating BARN --- p.30
Chapter 4.1 --- The Relaxed Master Problem --- p.30
Chapter 4.2 --- The Feasibility Pump Method --- p.32
Chapter 4.3 --- A-BARN Algorithm For Solving The JBAPC Problem --- p.34
Chapter 5 --- Computational Results --- p.36
Chapter 5.1 --- Global Optimality And Convergence --- p.36
Chapter 5.2 --- Average Convergence Time --- p.37
Chapter 5.3 --- Trade-off Between Performance And Convergence Time --- p.38
Chapter 5.4 --- Average Algorithm Performance Of BARN and A-BARN --- p.39
Chapter 6 --- Discussions --- p.47
Chapter 6.1 --- Resource Allocation In The Uplink Multi-cell Networks --- p.47
Chapter 6.2 --- JBAPC Problem In The Uplink Multi-cell Networks --- p.48
Chapter 7 --- Conclusion --- p.50
Chapter 7.1 --- Conclusion Of This Thesis --- p.50
Chapter 7.2 --- Future Work --- p.51
Chapter A --- The Proof --- p.52
Chapter A.l --- Proof of Lemma 1 --- p.52
Chapter A.2 --- Proof of Lemma 3 --- p.55
Bibliography --- p.58
Rockliff, Simon C. (Simon Charles). "Frequency hopping techniques for digital mobile radio / Simon C. Rockliff." 1990. http://hdl.handle.net/2440/19327.
Full textviii, 214 leaves : ill ; 30 cm.
Title page, contents and abstract only. The complete thesis in print form is available from the University Library.
Thesis (Ph.D.)--University of Adelaide, 1991
Rockliff, Simon C. (Simon Charles). "Frequency hopping techniques for digital mobile radio / Simon C. Rockliff." Thesis, 1990. http://hdl.handle.net/2440/19327.
Full text"Wireless access pricing." 2011. http://library.cuhk.edu.hk/record=b5894826.
Full textThesis (M.Phil.)--Chinese University of Hong Kong, 2011.
Includes bibliographical references (leaves 63-66).
Abstracts in English and Chinese.
Chapter 1 --- Introduction --- p.10
Chapter 1.1 --- Motivation and Overview --- p.10
Chapter 1.2 --- Thesis Outline --- p.13
Chapter 2 --- Problem Formulation --- p.15
Chapter 2.1 --- Basic Wireless Market Model --- p.15
Chapter 2.2 --- "User's Utility, Payment, Payoff, and Demand" --- p.17
Chapter 2.3 --- Network Costs --- p.18
Chapter 2.4 --- Access Price --- p.20
Chapter 3 --- Fixed Coverage Two Base Stations Model --- p.21
Chapter 3.1 --- Social Optimal User Pricing --- p.21
Chapter 3.2 --- Social Optimal Access Pricing --- p.24
Chapter 3.2.1 --- "Networks' Profit-Maximizing User Pricing Given Fixed Access Prices:TT1* (α1 α2) and TT2* (α1, α2)" --- p.24
Chapter 3.2.2 --- Social Optimal Access Pricing: αS1 and αS2 --- p.27
Chapter 3.3 --- Deregulated User Pricing and Access Pricing --- p.30
Chapter 3.3.1 --- User's Optimal Data Rate Demand in Stage III --- p.30
Chapter 3.3.2 --- Operators' User Pricing in Stage II --- p.30
Chapter 3.3.3 --- Operators' Access Pricing in Stage I --- p.31
Chapter 4 --- Full Coverage Two Base Stations Model --- p.34
Chapter 4.1 --- Full Coverage Wireless Market Model --- p.34
Chapter 4.2 --- Users' choice of service providers --- p.35
Chapter 4.3 --- Social Optimal User Pricing --- p.36
Chapter 4.3.1 --- Numerical study --- p.38
Chapter 4.4 --- Deregulated case - Profit-maximizing access price and user price --- p.41
Chapter 4.4.1 --- Numerical Study --- p.45
Chapter 5 --- Full Coverage Three Base Stations Model --- p.46
Chapter 5.1 --- Three base-stations Full Coverage Market Model --- p.46
Chapter 5.2 --- Social Optimal User Prices --- p.48
Chapter 5.2.1 --- Numerical Study --- p.50
Chapter 5.3 --- Deregulated scenario --- p.53
Chapter 5.3.1 --- Numerical Study --- p.57
Chapter 6 --- Conclusions and Future Work --- p.60
Bibliography --- p.63
"Transport layer optimization for mobile data networks." 2010. http://library.cuhk.edu.hk/record=b5894706.
Full text"September 2010."
Thesis (M.Phil.)--Chinese University of Hong Kong, 2010.
Includes bibliographical references (p. 53-55).
Abstracts in English and Chinese.
Acknowledgements --- p.ii
Abstract --- p.iii
摘要 --- p.iv
Contents --- p.v
Chapter Chapter 1 --- INTRODUCTION --- p.1
Chapter Chapter 2 --- BACKGROUND AND RELATED WORK --- p.4
Chapter 2.1 --- Sender-receiver-based approaches --- p.4
Chapter 2.2 --- Sender-based approaches --- p.5
Chapter 2.3 --- Receiver-based approaches --- p.6
Chapter Chapter 3 --- TCP FLOW CONTROL REVISITED --- p.8
Chapter Chapter 4 --- OPPORTUNISTIC TRANSMISSION --- p.12
Chapter 4.1 --- Link bandwidth estimation --- p.16
Chapter 4.2 --- Reception rate estimation --- p.18
Chapter 4.3 --- Transmission scheduling --- p.19
Chapter 4.4 --- Performance --- p.21
Chapter Chapter 5 --- Local Retransmission --- p.23
Chapter 5.1 --- The blackout period --- p.24
Chapter 5.2 --- Proactive retransmission --- p.28
Chapter 5.3 --- Performance --- p.30
Chapter Chapter 6 --- Loss Event Suppression --- p.31
Chapter 6.1 --- RTT modulation --- p.32
Chapter 6.2 --- Performance --- p.35
Chapter Chapter 7 --- Fairness --- p.37
Chapter 7.1 --- Packet forwarding --- p.37
Chapter 7.2 --- Non-uniform bandwidth allocation --- p.41
Chapter Chapter 8 --- EXPERIMENTS --- p.43
Chapter 8.1 --- Experiment setup --- p.43
Chapter 8.2 --- Packet loss --- p.44
Chapter 8.3 --- Unaccelerated TCP throughput --- p.45
Chapter 8.4 --- Accelerated TCP throughput --- p.46
Chapter 8.5 --- Fairness --- p.47
Chapter 8.6 --- Mobile handset performance --- p.47
Chapter Chapter 9 --- FUTURE WORK --- p.49
Chapter 9.1 --- Dynamic AWnd control --- p.49
Chapter 9.2 --- Split-TCP --- p.50
Chapter 9.3 --- Dynamic resource allocation --- p.50
Chapter 9.4 --- Sender-based acceleration --- p.51
Chapter Chapter 10 --- CONCLUSION --- p.52
BIBLIOGRAPHY --- p.53
"Sensor network deployment as least squares problems." 2011. http://library.cuhk.edu.hk/record=b5894525.
Full textThesis (M.Phil.)--Chinese University of Hong Kong, 2011.
Includes bibliographical references (leaves 99-104).
Abstracts in English and Chinese.
Chapter 1 --- Introduction --- p.1
Chapter 1.1 --- Background of Sensors and Sensor Networks --- p.2
Chapter 1.2 --- Introduction to Coverage Problems --- p.6
Chapter 1.3 --- Literature Review --- p.8
Chapter 1.3.1 --- Deterministic Deployment Methods --- p.9
Chapter 1.3.2 --- Dynamic Deployment Methods --- p.10
Chapter 1.4 --- A Brief Introduction to Least Squares Analysis --- p.13
Chapter 1.5 --- Thesis Outline --- p.15
Chapter 2 --- Mobile Sensor Network Deployment Problem --- p.18
Chapter 2.1 --- Sensor Coverage Models --- p.18
Chapter 2.1.1 --- Binary Sensor Models --- p.19
Chapter 2.1.2 --- Attenuated and Truncated Attenuated Disk Models --- p.20
Chapter 2.2 --- Problem Statement --- p.23
Chapter 3 --- Coverage Optimization as Nonlinear Least Squares Problems --- p.26
Chapter 3.1 --- Introduction --- p.26
Chapter 3.2 --- Network Deployment as Least Squares Problems --- p.28
Chapter 3.2.1 --- Assignment of Sample Points --- p.28
Chapter 3.2.2 --- Least Squares Function --- p.30
Chapter 3.2.3 --- Gauss-Newton Method --- p.33
Chapter 3.2.4 --- Solutions --- p.36
Chapter 3.3 --- Extension to Binary Sensor Models --- p.39
Chapter 3.3.1 --- Restrictions of Subgradient Methods --- p.40
Chapter 3.3.2 --- Sigmoid Functions --- p.42
Chapter 3.4 --- Convergence and Multiple Minima Issues --- p.44
Chapter 3.4.1 --- Convergence --- p.44
Chapter 3.4.2 --- Multiple Minima --- p.48
Chapter 3.5 --- Stopping Criteria --- p.52
Chapter 3.6 --- Summary --- p.53
Chapter 4 --- Experimental Results --- p.55
Chapter 4.1 --- Introduction --- p.55
Chapter 4.2 --- Numerical Examples --- p.56
Chapter 4.2.1 --- Examples of Attenuated Disk Models --- p.57
Chapter 4.2.2 --- Examples of Binary Sensor Models --- p.63
Chapter 4.3 --- Performance Metrics of Mobile Sensor Deployment Schemes --- p.68
Chapter 4.4 --- Comparison to Existing Methods --- p.74
Chapter 4.5 --- Summary --- p.81
Chapter 5 --- Conclusions --- p.83
Chapter 5.1 --- Conclusions --- p.83
Chapter 5.2 --- Future Research Directions --- p.85
Appendices --- p.87
Chapter A --- An Overview of Existing Deployment Methods --- p.88
Chapter A.1 --- Potential Fields and Virtual Forces --- p.88
Chapter A.2 --- Distributed Self-Spreading Algorithm --- p.92
Chapter A.3 --- VD-Based Deployment Algorithm --- p.96
Bibliography --- p.99
Juma, Raymond Wekesa. "An optimisation approach for capacity enhancement in third generation (3G) mobile networks." Thesis, 2012. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1000570.
Full textThis study proposes a mathematical optimisation approach which invokes Genetic Algorithm (GA) for initialisation and application of Tabu Search (TS) algorithm in finding the sites of node Bs in the network to enable it have the potential to support an increased number of users requiring the increased number of services. The global optimisation can be obtained in terms of great probability as GA is applied to global search and TS is applied to the local search. The particular memory ability of TS can be integrated to GA and the prematurity of GA can be avoided by virtue of the hill-climbing ability of TS. The problem to be addressed is the determination of optimal locations of node Bs in the network based on the user distribution, while improving the QoS. The proposed approach considers the site selection as an integer problem and the site placement as a continuous problem. The two problems are focused on concurrently - finding the optimal number of node Bs that satisfies the capacity requirements in the network and hence QoS improvement. The proposed algorithm combines the strength of Genetic and Tabu Search algorithms in successive elimination of node Bs after their random distribution in the area of study. The results showed that the proposed approach produced fewer number of node Bs sites in the network that provided the required QoS. In addition, it exhibited high fitness function in the simulations meaning that it has the higher ability of achieving the objective function when it was compared to TS and GA.