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Dissertations / Theses on the topic 'UMTS'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 July 2025

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1

Oliver, Kathryn E. "UMTS network optimisation." Thesis, Cardiff University, 2005. http://orca.cf.ac.uk/54561/.

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Network operators desire effective, pragmatic solutions to instances of the cell planning problem in order to improve their quality of service, enhance network coverage and capacity capability, and ultimately increase company profits. Previ ous cell plans have been constructed manually but these methods do not produce the best network configuration. More reliance has since been placed on automated cell planning to produce effective solutions. The introduction of the Universal Mobile Telecommunication System (UMTS) emphasizes the need for high perfor mance planning tools. Motivated by a discuss
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2

Boujemaa, Hatem. "Récepteur UMTS optimisé." Paris, ENST, 2001. http://www.theses.fr/2001ENST0023.

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L'apparition de nouveaux services nécessitant de comminiquer à des débits de plus en plus élevés et avec une qualité meilleure est à I'origine de l'émergence de la troisième génération de radio-mobiles. En Europe. Ies caractéristiques de cette nouvelle génération sont entrain d'être spécifiées dans la norme UMTS ("Universal Mobile Télécommunication Standard"). Dans ce mémoire de thèse, nous avons traité divers thèmes clés de la norme UMTS. Nous avons commencé par développer les structures de deux implémentations du récepteur en râteau permettant de récupérer une grande partie de la diversité o
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3

Srdínko, Milan. "Model systému UMTS." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217676.

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Spread Spectrum Communication techniques have been widely used in mobile and wireless communications. They have very beneficial features like antijam and security (noise-like character, pseudorandom codes usage). At first, the features of Spread Spectrum systems are described with emphasis on the Direct Sequence Spread Spectrum (DS-SS) scheme. Main specifications of UMTS system are also introduced. The goal of this thesis was to create the model of a physical layer UMTS suitable for investigation of disturbing signals influences in Matlab Simulink. This model was used to measure how the Bit er
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Boujemaa, Hatem. "Récepteur UMTS optimisé /." Paris : École nationale supérieure des télécommunications, 2001. http://catalogue.bnf.fr/ark:/12148/cb38838443s.

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5

De, Bruijn Marc. "Marktchancen für UMTS-Dienste." St. Gallen, 2004. http://www.biblio.unisg.ch/org/biblio/edoc.nsf/wwwDisplayIdentifier/01649102001/$FILE/01649102001.pdf.

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6

Datta, Subhalakshmi. "UMTS radio network optimisation." Thesis, University of Surrey, 2010. http://epubs.surrey.ac.uk/843921/.

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Radio network planning and optimisation include tasks such as propagation prediction, performance evaluation, and configuration optimisation. Unlike Time Division Multiple Access (TDMA) based systems, the network performance of Third Generation (3G) cellular systems cannot be based on signal predictions only. The maximum achievable path loss in a Wideband Code Division Multiple Access (WCDMA) cell is dependent on the cell load, which creates a complex trade-off between coverage and capacity. Given a user distribution, network performance calculation involves optimisation of transmit powers tak
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7

Havlíček, Karel. "Optimalizace přístupové sítě UMTS." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217447.

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This master’s thesis deals with a UMTS radio access network optimization, containing radio interface analysis, services and procedures description, ways to correct parameters calculations and settings and other issues necessary for a correct access network operation. The goal is effective network operation, minimum costs and maximum performance and flexibility of the network. The optimization during system operation is important because of the system character. The UMTS system uses the WCDMA technology, where particular users share the same frequency band and they are distinguished from one an
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8

Spěváček, Jiří. "Plánování přístupových sítí UMTS." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217448.

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The master thesis is focused on the Universal Mobile Telecommunications System (UMTS) - the third-generation cell phone technology. The first part describes the development of mobile networks and the structure of the UMTS. The second part, the main part of the thesis, is focused on the planning procedure of the UMTS access network. It consists of an explanation of the general planning procedure and a specific project designing the coverage of Pelhřimov surroundings. The final part of the thesis contains a laboratory problem including instructions.
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9

Kavan, Radovan. "QoS v systému UMTS." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-218026.

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This thesis treats of QoS (Quality of Service) in UMTS system. The term quality of service is frequently used, recently, however not only in computer networks, but also more and more in mobile networks also. Present system of 2nd generation (2G) GSM enables only limited exploitation of QoS function. System UMTS is a system of 3rd generation (3G) already and contains quality of service in greater measure which is ensured with number of algorithms and functions. Individual QoS functions enable effective utilization of radio interface, support maintenance of planned coverage and offer high spectr
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10

Булашенко, Андрій Васильович, Андрей Васильевич Булашенко, Andrii Vasylovych Bulashenko та І. В. Забегалов. "Аналіз мережі третього покоління UMTS". Thesis, Сумський державний університет, 2016. http://essuir.sumdu.edu.ua/handle/123456789/47185.

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Радіомережа стандарту UMTS (Universal Mobile Telecommunications System) – система мобільного зв’язку третього покоління, що розроблена у межах IMT2000 Європейським Інститутом Стандартів Телекомунікацій (ETSI) для впровадження 3G у Європі.
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11

Videira, António Germano Paiva. "Difusão e multicast em UMTS." Master's thesis, Universidade de Aveiro, 2008. http://hdl.handle.net/10773/1936.

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Mestrado em Engenharia Electrónica e Telecomunicações<br>Desde os primórdios da existência humana que existe a necessidade de comunicar. O ser humano desde então tem procurado meios de comunicação mais rápidos e eficientes. A eficácia da comunicação bem como a partilha de conteúdos quando vários clientes requerem a mesma informação no mesmo instante de tempo constituem o tema central deste trabalho, permitindo utilizar os recursos de rede dos operadores móveis de uma forma muito mais optimizada. Actualmente as redes UMTS usam a transmissão em modo unicast que não é uma solução escalável para a
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12

Trojáček, Jaroslav. "Rozbor signalizace u sítí UMTS." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217270.

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Master thesis is focused on signalling analysis of third-generation mobile network UMTS. In first part of master thesis is described a question of standard IMT-2000, introduces the principles of the WCDMA air interface, gives a wide overview of the UMTS system architecture and signal processing. In second part of master thesis is described a question of signalling analysis, including general protocol model for UTRAN terrestrial interfaces. This chapter is focused on elementary procedures, Radio Resource Management procedure examples, Mobility Management procedure examples and Call Control proc
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13

Kokeš, Roman. "Multicastové směrování v UMTS sítích." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217544.

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This Master thesis is about multicast in mobile network 3rd generation UMTS(Universal Mobile Telecommunacitions System). UMTS network primary designs for data transfers and supports new services as real-time transfers of multimedia streams. This is reason why mobile network was equiped also with multicast service. When a lot of users want to receive same data (e.g. tv program) the network excessives load of transmission same data and the server have to keep connection to each user. Group 3GGP developed multicast service for UMTS, which name is MBMS (Multimedia Broadcast and Multicast Service).
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14

Fabricius, Marián. "Zajištění QoS v UMTS síti." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-218065.

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Diploma thesis deals with assign and distribution quality of service in mobile UMTS telecommunication networks. The project consists of two parts, theoretical and practical. Theoretical part of the project is focused to familiarize with functionality of the UMTS network with the main aspect at admission mechanism in radio part of the network as well as quality of service assign mechanisms according to service demands within core network of UMTS. Practical part of the project is given to simulation program OPNET Modeler and its capabilities in network design and testing various parameters of UM
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15

Xu, Kai. "Radio resource management for satellite UMTS : dynamic scheduling algorithm for a UMTS-compatible satellite network." Thesis, University of Bradford, 2009. http://hdl.handle.net/10454/5685.

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The third generation of mobile communication systems introduce interactive Multicast and Unicast multimedia services at a fast data rate of up to 2 Mbps and is expected to complete the globalization of the mobile telecommunication systems. The implementation of these services on satellite systems, particularly for broadcast and multicast applications to complement terrestrial services is ideal since satellite systems are capable of providing global coverage in areas not served by terrestrial telecommunication services. However, the main bottleneck of such systems is the scarcity of radio resou
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16

Xu, Kai J. "Radio Resource Management for Satellite UMTS. Dynamic scheduling algorithm for a UMTS-compatible satellite network." Thesis, University of Bradford, 2009. http://hdl.handle.net/10454/5685.

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The third generation of mobile communication systems introduce interactive Multicast and Unicast multimedia services at a fast data rate of up to 2 Mbps and is expected to complete the globalization of the mobile telecommunication systems. The implementation of these services on satellite systems, particularly for broadcast and multicast applications to complement terrestrial services is ideal since satellite systems are capable of providing global coverage in areas not served by terrestrial telecommunication services. However, the main bottleneck of such systems is the scarcity of rad
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17

Hameed, Farhan. "Rate Scheduling for HSDPA in UMTS." Thesis, Högskolan Dalarna, Datateknik, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:du-3734.

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The introduction of a new technology High Speed Downlink Packet Access (HSDPA) in the Release 5 of the 3GPP specifications raises the question about its performance capabilities. HSDPA is a promising technology which gives theoretical rates up to 14.4 Mbits. The main objective of this thesis is to discuss the system level performance of HSDPAMainly the thesis exploration focuses on the Packet Scheduler because it is the central entity of the HSDPA design. Due to its function, the Packet Scheduler has a direct impact on the HSDPA system performance. Similarly, it also determines the end user pe
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18

Sumanasena, Muddarage Abhaya Kumarasiri. "Adaptive physical layer for satellite UMTS." Thesis, University of Surrey, 2002. http://epubs.surrey.ac.uk/843328/.

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Satellite resource management efficiency has been identified as one of the key factors in the commercial success of mobile satellite systems, since optimisation of all link budget elements is crucially important in order to make the most out of the satellite limited resources (bandwidth, power) which in turn have a direct impact on the cost of the system. The compensation techniques used in order to overcome the fading effects experienced in the link are generally applied by considering the worst-case channel conditions, resulting in inefficient utilisation of the transmission power as well as
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19

Machauer, Ralf [Verfasser]. "Multicode-Detektion im UMTS / Ralf Machauer." Karlsruhe : KIT-Bibliothek, 2002. http://d-nb.info/1013806395/34.

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20

Nourizadeh, Hamed. "UMTS cellular network with relaying concept." Thesis, University of Surrey, 2006. http://epubs.surrey.ac.uk/844065/.

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Wideband Code Division Multiple Access (WCDMA) is one of the technologies for third generation systems. In a CDMA system, all users interfere with each others, therefore the CDMA system is interference limited. The users, who suffer from a strong shadow effect or that are far away from the BS, need more power to reach it. In this case, the users may transmit at their maximum allowed power without satisfying their Quality of Service. Therefore, this would leave some mobiles in outage and also create too much interference to the neighboring cells. One-way to counter this problem and therefore to
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21

Knoche, Klaus. "Empfänger-Strukturen für die UMTS-Abwärtsstrecke." Aachen Shaker, 2009. http://d-nb.info/995162085/04.

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22

Knutsson, Björn. "Simulation of radio resource management for UMTS." Thesis, Linköping University, Department of Electrical Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2364.

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<p>A current trend in the information society is that traditionally fixed computing resources are made available to mobile users. Most of the existing techniques for communication have been developed for stationary computing, and they must be adapted to the different connection properties of the mobile environment. One of the emerging mobile computing environments is the Universal Mobile Telecommunication System, UMTS. This system places demands on the quality of service that is provided to data flows, which requires resource management in the connection network. The most scarce resources in t
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23

Sureshkumar, Meena. "Undersökning av mätsystem för UMTS (3G) telefoner." Thesis, Linköping University, Department of Science and Technology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-7725.

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<p>Företaget Flextronics AB i Linköping testar moderna mobiltelefoner för tillverkares räkning. Som examensarbete har jag fått företagets uppdrag att utvärdera och förbättra deras testsystem DVT-UMTS (3G).</p><p>DVT-UMTS är ett komplext system av komponenter, och man misstänker att dessa stör varandra inbördes, vilket i sin tur kan ge felaktiga mätresultat.</p><p>Beträffande mottagarsidan hos en mobiltelefon tror man att DVT-UMTS p g a störningar, s k intermodulationsprodukter, uppvisar bitfelshalter i testet Rx Out of band blocking. Komponenter som kan tänkas ge störningar är continuous wave-
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24

Flohrer, Marco. "UMTS - Mehr als nur zum Telefonieren gut." Universitätsbibliothek Chemnitz, 2001. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-200100471.

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Gemeinsamer Workshop von Universitaetsrechenzentrum und Professur "Rechnernetze und verteilte Systeme" der Fakultaet fuer Informatik der TU Chemnitz. Workshop-Thema: Mobilitaet Technik und Anwendungsmöglichkeiten des Mobilfunkstandards der 3. Generation unter Einbeziehung von Vorgänger-, Alternativ-, sowie Nachfolgesystemen.
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Widiawan, Anggoro Kurnianto. "Characteristics and performance of airplane-based UMTS." Thesis, University of Surrey, 2005. http://epubs.surrey.ac.uk/843124/.

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Since the first generation of mobile communication systems (IG), mobile services have been relying on ground-based infrastructures. However, the increasing mobile services demand on higher frequencies and higher data rates has been urging the ground-based systems to have far more sites. With a limited number of appropriate sites, achieving seamless coverage and supporting high user mobility may not be cost effective. On the other hand, satellites have been operated to gain regional or global mobile communications coverage and offer high user mobility. Yet these space-based infrastructures have
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Niemeier, Stefan. "Die deutsche UMTS-Auktion : eine spieltheoretische Analyse /." Wiesbaden : Dt. Univ.-Verl, 2002. http://www.gbv.de/dms/zbw/355319993.pdf.

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Benmimoune, Abderrahmane. "Handoff vertical entre réseau UMTS et WLAN." Mémoire, École de technologie supérieure, 2010. http://espace.etsmtl.ca/627/1/BENMIMOUNE_Abderrahmane.pdf.

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Un des principaux défis majeurs des prochaines générations des systèmes de communication sans fil serait d'utiliser les ressources limitées des réseaux de communications d'une manière efficace à l'effet d'obtenir une qualité et une capacité qui soient suffisantes pour faire face à des demandes sans cesse croissante de services. En effet, les besoins en bande passante des utilisateurs ont augmenté en raison des résultats satisfaisants relevés des différentes applications telles que la vidéo et la navigation sur Internet. Ceci a permit à plusieurs technologies de voir le jour et qui ne ces
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28

Pathak, Bhumin H. "Video transmission over UMTS mobile radio network." Thesis, Oxford Brookes University, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.432790.

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Lim, Woo Lip. "Handover for high altitude platform station UMTS." Thesis, University of Surrey, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250939.

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30

Thomas, Nicholas J. "Techniques for mobile location estimation in UMTS." Thesis, University of Edinburgh, 2001. http://hdl.handle.net/1842/426.

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The subject area of this thesis is the locating of mobile users using the future 3rd generation spread spectrum communication system UMTS. The motivation behind this work is twofold: firstly the United States Federal Communications Commission (FCC) mandated the provision of user location into services in the United States of America due to the increasing number of emergency calls originating from unknown locations. Secondly the user location can enable a number of other potentially profit–making applications and services. These are generally thought to be the important new applications of the
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31

Amador, António Jorge Vieira. "Distribuição de sinais UMTS sobre fibra óptica." Master's thesis, Universidade de Aveiro, 2008. http://hdl.handle.net/10773/2026.

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Mestrado em Engenharia Electrónica e Telecomunicações<br>O principal objectivo deste trabalho passa por descrever, demonstrar e simular um novo conceito de sistema de comunicação opto-electrónico. Este novo conceito de sistema de comunicação híbrido consiste em aplicar Code Division Multiple Access (CDMA) eléctrico num sistema Wavelength Division Multiplexing (WDM) óptico por forma a que a cada comprimento de onda seja atribuído um código ortogonal CDMA único antes da modulação do respectivo LASER. O objectivo desta abordagem é recuperar o canal de informação presente em cada comprimento de on
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32

Oh, Seong-Hoon. "Satellite-UMTS : specification of protocols and traffic performance /." Aachen : Mainz, 2005. http://opac.nebis.ch/cgi-bin/showAbstract.pl?u20=3861301768.

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33

Bing, Torsten. "Zeitduplexbasierte Mobilkommunikation, untersucht am Beispiel eines TD-CDMA-Mobilfunksystems." [S.l.] : [s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=963489496.

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34

Mäder, Andreas. "Performance models for UMTS 3.5G mobile wireless systems." Würzburg Inst. für Informatik, Lehrstuhl für Verteilte Systeme, 2008. http://d-nb.info/999915061/34.

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35

Modi, Nikunj. "Performance Evaluation of TCP Variants over UMTS Networks." Thesis, Uppsala University, Department of Information Technology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-98273.

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<p>With the evolution of 3G technologies like Universal Mobile TelecommunicationSystem (UMTS), the usage of TCP has become more popular for a reliable end-to-end (e2e) data delivery. However, TCP was initially designed for wired networks and therefore it suffers performance degradation due to the radio signal getting affected by fading, shadowing and interference. There are many strategies proposed by the research community on how to improve the performance of TCP over wireless links such as introducing link-layer retransmission, explicitly notifying the sender of network conditions or using n
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Baloch, Yasir Ali. "UMTS Positioning Methods and Accuracy in Urban Environments." Thesis, Linköpings universitet, Kommunikations- och transportsystem, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-73853.

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During the 2nd generation Global System for Mobile Communications (GSM) mobile communication, the focus of the mobile positioning was mostly on call setup and messaging. But the evolution of the 3rd generation Wideband Code Division Multiple Access (WCDMA) has changed the focus of mobile positioning. With the increase use of smart phones the mobile positioning is now extensively used for location based services (LBS’s). Mobile positioning becomes extremely important when the user requests any particular LBS, because it directly affects the communication and resource handling between the networ
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Seeger, Ralf [Verfasser]. "Effiziente Konzepte für die UMTS-Abwärtsstrecke / Ralf Seeger." Aachen : Shaker, 2010. http://d-nb.info/1101184272/34.

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Osman, Ammar. "Low-complexity OFDM transceiver design for UMTS-LTE." Thesis, Blekinge Tekniska Högskola, Avdelningen för signalbehandling, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3716.

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Over the past two decades the mobile wireless communication systems has been growing fast and continuously. Therefore, the standardization bodies together with wireless researchers and mobile operators around the globe have been constantly working on new technical specifications in order to meet the demand for this rapid growth. The 3rd Generation Partnership Project (3GPP) one of the largest of such standardization bodies, works on developing the current third generation (3G) mobile telecommunication systems towards the future 4th generation. Research towards meeting the higher demands for hi
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Gombachika, Harry Sam Harrison. "Mobile telecommunication CDMA power control for S-UMTS." Thesis, University of Surrey, 2003. http://epubs.surrey.ac.uk/842850/.

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Since under the UMTS framework, the development of S-UMTS follows that of T-UMTS with the ultimate aim of achieving close integration between S-UMTS and T-UMTS air-interface designs, closed-loop transmit power control (TPC) remains a physical-layer procedure option for enhancing the performance of S-UMTS. In S-UMTS, however, closed-loop TPC should be modified to take into account large TPC command delays due to propagation. In this thesis, we study strength-based closed-loop TPC schemes for S-UMTS in order to develop TPC schemes that mitigate the effects of TPC command delays due to propagatio
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Werner, Marc Walter. "Maßnahmen zur Qualitäts- und Kapazitätssteigerung in UMTS-Mobilfunknetzen /." Aachen : Mainz, 2006. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=014903973&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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Knoche, Klaus [Verfasser]. "Empfänger-Strukturen für die UMTS-Abwärtsstrecke / Klaus Knoche." Aachen : Shaker, 2009. http://d-nb.info/1156518180/34.

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42

Ahn, Dae-Young. "Interference management and code planning in WCDMA UMTS." Thesis, University of Surrey, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.252354.

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43

Hadef, Mahmoud. "Adaptive equalisation for downlink UMTS terrestrial radio access." Thesis, University of Southampton, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.438723.

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VALE, EDUARDO RODRIGUES. "TECHNIQUES FOR VOICE TRANSMISSION IMPROVEMENT IN UMTS SYSTEMS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2006. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=8933@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>A partir da necessidade do transporte de informação multimídia, foram desenvolvidos os Sistemas Celulares de Terceira Geração, ainda em fase de padronização, cujo candidato mais promissor é o UMTS (Universal Mobile Telecommunications System). De forma consonante com a tendência mundial de utilização crescente da tecnologia IP (Internet Protocol) nas redes fixas, o UMTS veio a incorporar este protocolo, que apresenta uma maior flexibilidade para a introdução de novos serviços. Assim, na arquitetura do UMTS existem atualmente dois modo
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45

Gleissner, Filip. "Koexistence mobilních komunikačních systémů GSM-EDGE a UMTS." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-233470.

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The dissertation thesis deals with the investigation of the coexistence of GSM–EDGE and UMTS systems with focus on the physical layer of the systems. The aim is to provide a set of recommendations for practical cooperation while the systems operate in both the separated and the common radio bands. A detailed description of signal processing of both the systems on the physical layer is presented. On the basis of this description, models of both systems were created and implemented in the MATLAB environment. The simulations are focused on the physical layer quality parameters, especially the bit
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46

Almeida, Carlos Filipe Pereira de. "Acesso rádio UMTS, WLAN e WIMAX sobre fibra." Master's thesis, Universidade de Aveiro, 2008. http://hdl.handle.net/10773/2005.

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Mestrado em Engenharia Electrónica e Telecomunicações<br>O presente trabalho tem por objectivo o estudo e implementação de uma rede óptica passiva para a transmissão de sinais rádio sobre fibra. Para tal, são estudados e analisados diversos componentes optoelectrónicos que constituem uma rede óptica passiva, tendo em vista a optimização e desenvolvimento da mesma. Por forma a definir os limites, bem como desenvolver conhecimentos sobre os processos que limitam ondas de rádio em fibra, foram realizadas simulações computacionais em redes óptica passivas com transmissão de sinais 3G-UMTS, objecti
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47

Pinho, Pedro Nuno Santos. "Plataforma de simulação para sistemas UMTS TDD UL." Master's thesis, Universidade de Aveiro, 2003. http://hdl.handle.net/10773/21760.

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Mestrado em Engenharia Electrónica e Telecomunicações<br>Este trabalho descreve a arquitectura e o desenvolvimento de uma plataforma de avaliação de esquemas de processamento de sinal avançadas para a transmissão ascendente do modo TDD do “Universal Mobile Telecommunications System” (UMTS). A plataforma de simulação é baseada no pacote de simulação comercial COSSAP e abrange a camada física do “UMTS Terrestrial Radio Access” (UTRA), a partir / depois da descodificação / codificação do sinal, como especificada pelo 3GPP. Começa por dar uma perspectiva histórica da evolução das comunicaçõ
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48

Krishna, Emir. "Security issues on m-Commerce over 3G/UMTS /." Leeds, 2001. http://www.leeds.ac.uk/library/counter2/compstmsc/20002001/krishna.doc.

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49

Bednárik, Ján. "Modelování řízeného využití síťových zdrojů v sítích UMTS." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-218142.

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The main aim of my master thesis was to get acquainted with the implementation of quality-of-service support methods in UMTS 3G mobile network and the evaluation of these methods in a simulation environment with main interest in the characteristic features of the traffic classes. The impact of the QoS methods available on different service types were verified in the OPNET Modeler simulation environment. I examined mainly the potentials of the model to support the required quality parameters for the connections. The models of typical network applications, available in real UMTS networks, togeth
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50

Predajňa, Martin. "Lokalizátor interferencí pro kmitočtová pásma EGSM a UMTS." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219108.

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Diploma thesis describes direction finding principles for passive localization of emitting source. Direction finding system with one rotating antenna was chosen with triangulation calculation of emitter position. Input parameters are position of measurement point and direction of maximum signal receiving level. A suitable digital compass module and GPS receiver module for this measurement was chosen. For this purpose was created a graphic user interface, which allow user to communicate with external devices and control spectrum analyzer. Results of measurements are displayed at map, together w
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