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Universal Cabling Design for the Company GNT s.r.o
Doležal, Martin ; Koleňák, Jiří (referee) ; Ondrák, Viktor (advisor)
The thesis is to analyse and design universal cabling in a multi-functional house that will be subject to a thorough reconstruction. The house shall serve for business purposes of the company GNT, s.r.o.. The cabling design is based on investor´s requirements and the construction plan analysis of the house. There had been no computer network in the house. The thesis shall encompass a complete documentation of the project, and its estimated budget.
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Communication systems based on MB-OFDM
Škapa, Martin ; Šebesta, Vladimír (referee) ; Maršálek, Roman (advisor)
The aim of the Master’s Thesis is to describe ideas of the MB-OFDM principle that represents the possibility of OFDM principle implementation in ultra wideband systems. There are compared physical layers of the IEEE 802.15.3a and the ECMA-368 standard which include the MB-OFDM principle. In practical part of the thesis, there was created a model of ECMA-368 physical layer in MATLAB environment including CDMA access principle. Finally, the MB OFDM system resistance against disturbance and the Peak-to-Average-Power Ratio is analyzed and commented.
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Computer Network Design for the Multifunctional House
Lukeš, Pavel ; Steidl, Jaromír (referee) ; Ondrák, Viktor (advisor)
This bachelor thesis deals with the analysis, followed by design of a computer network in the multifunctional house, which will be used for purposes of an unnamed company and also for a family of four members. First part is based on the analysis of the current state of the house. The second part is focusing on the theoretical bases, which will be used, together with an analysis, to design a custom solution. This custom solution, including specific procedures and elements, which will be implemented in realization, is described in the final part of this bachelor thesis.
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GSM-EDGE and UMTS Systems Coexistence
Gleissner, Filip ; Hanus, Stanislav (advisor)
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 error ratio evaluation for various ratios of useful signal power to noise power during the transmission over the radio channel. Simulation is also used to examine the quality of received useful signal while it is interfered by signals from the same and adjacent channels. The purpose is to determine the isolation between these adjacent channels, when the bit error ratio of the useful signal does not exceed a certain reference value. The simulation results are subsequently subjected to comparison with the results of the experimental measurements in laboratory conditions. Before the measurements are carried out, a study of possible interference types is performed. Consequently, the crucial parameters of the measuring equipment used are verified. From the results of simulations and measurements, the proposal of a minimum and recommended carrier separation between both the systems is presented in order to efficiently utilize the assigned frequency spectrum. Furthermore, for the cooperation in both the separated and the common radio bands, the necessary precautions are given for reaching the required isolation and thereby inter-system interference minimization.
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Physical layer model of LTE system
Kounek, Milan ; Wieser, Vladimír (referee) ; Hanus, Stanislav (advisor)
Master’s thesis deals with the signal processing in LTE system, specifically focuses on the physical layer. The first part describes in detail the signal processing at the physical layer of the LTE system. Based on the acquired knowledge of signal processing is created a block diagram that graphically describes the process of the signal processing. Next part deals with the created mathematical model, which is programmed in Matlab. This section describes the limitations of the model, configuration options and view simulation results. The last part shows the results of simulations and analyzed the results.
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Physical security and network management on physical layer
Rozsypal, Ondřej ; Burda, Karel (referee) ; Hajný, Jan (advisor)
This master's thesis is focused on physical security, mainly the network management of the ISO/OSI physical layer. First part deals with the motivation of introducing inteligent solutions. The second part explains the basic principles used in the physical layer management. The third section is focused on particular solutions available by the Molex company. The last parts of this thesis describe identified weaknesses and a comparison of such solution and other solutions provided by competition. The appendix of this thesis involves a created laboratory exercise.
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Novel Hybrid One-wire Bus for Microelectronic Systems
Levek, Vladimír ; Bajer,, Josef (referee) ; Husák, Miroslav (referee) ; Šteffan, Pavel (advisor)
The thesis is focused on the research and development of a new hybrid one-wire bus with special use enabling microelectronic integration. The bus, its physical layer and protocol have been developed based on applied research to meet the complex requirements of a new application group. These requirements are especially laid on the bus robustness and its immunity to interference and to work under real operating conditions. Part of the thesis is a description of existing solutions of one-wire buses, definition of current solutions and setting of goals for research of the new bus. Further are made the design of protocol and operating parameters of the bus operating in low power and power mode. In conclusion, the thesis deals with the practical verification of the proposed solution and there is also suggested a perspective of follow-up research in this area.
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Models of Control Channels in the LTE System
Miloš, Jiří ; Wieser, Vladimír (referee) ; Masopust, Jiří (referee) ; Hanus, Stanislav (advisor)
Dizertační práce se zabývá zpracováním signálu fyzických řídicích kanálů systému LTE a vyšetřováním bitové chybovosti při přenosu řídicí informace z vysílače do přijímače v závislosti na podmínkách příjmu. Práce je rozdělena do dvou hlavních částí. První část práce je zaměřena na simulaci přenosu řídicí informace LTE v základním pásmu. Jsou zde prezentovány vytvořené simulátory řídicích kanálů ve směru uplink i downlink. Simulace jsou provedeny pro všechny druhy nastavení systému a základní modely přenosového prostředí. Jsou zde popsány výsledky vlivu použití MIMO technologií na kvalitu příjmu řídicí informace především v únikových kanálech. Druhá část práce je zaměřena na možnost nasazení systému LTE ve sdíleném pásmu ISM (2.4 GHz). Jsou zde představeny základní koncepce použití, na jejichž základě je vytvořen scénář simulací. Kapitola dále popisuje tvorbu simulátoru koexistence LTE a systému Wi-Fi v přeneseném pásmu ISM 2.4GHz. Jsou zde uvedeny výsledky simulací koexistence LTE a rušivého systému Wi-Fi provedených dle vytvořeného scénáře. Výsledky simulací koexistence LTE a Wi-Fi jsou ověřeny měřením v laboratorních podmínkách. Toto porovnání je důležité z hlediska optimalizace simulátoru koexistence. Dle výsledků obou typů simulací a měření jsou stanovena provozní doporučení, která mají přispět k bezpečnému a spolehlivému vysílání a příjmu řídicích informací LTE i při nepříznivých podmínkách příjmu.
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LTE system models
Navrátil, Petr ; Masopust, Jiří (referee) ; Hanus, Stanislav (advisor)
Master’s thesis is focused on part of mobile network named LTE. Project is analyzes the LTE physical layer, which is divided into four basic parts: Physical channels and modulation, Multiplexing and channel coding, Physical layer procedures, Physical layer measurements. Every part is described by actual 3GPP standard [1]. To understand the problem is expected a reader basic knowledge of OFDM systems, which the LTE system uses. The next part of this master’s thesis is dedicated to mathematic model physical layer of system LTE, created by program Matlab. This model is designed to measure errors in data transmission.
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Duplex simulation of LTE-Advanced system
Třetina, Vítězslav ; Staněk,, Miroslav (referee) ; Miloš, Jiří (advisor)
Master‘s thesis discusses about the issues of LTE-Advanced networks. The paper is divided into 4 parts. At the beginning describes some differences which are other then are mentioned in previous 2G and 3G networks. Next chapter focuses on the physical layer LTE. It describes the structure of transmission frames, channels and functions of transmission signals. It also describes briefly the function of HARQ process, turbo encoder and rate matcher. The penultimate chapter focuses on the design of the LTE-Advanced duplex simulator. The last chapter summarizes the results of the created round-trip simulator in the Matlab environment.
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