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Model of physical layer of communication system IEEE 802.11af
Saprykin, Yaroslav ; Ulovec, Karel (referee) ; Polák, Ladislav (advisor)
Tato diplomová práce se zabývá analýzou, návrhem a simulací modelu fyzické vrstvy bezdrátového komunikačního systému IEEE 802.11af. V práci je především popsána vysílací část komunikačního systému s důrazem na zpracování IEEE 802.11af signálu. Následně je vytvořeno blokové schéma a model pro vysílací a přijímací části ve vysílacích módech SISO a MIMO. Model je realizován s grafickým uživatelským rozhraním v programovém prostředí MATLAB. Vytvořená aplikace slouží k prozkoumání vlastností IEEE 802.11af modelu na základě jeho systémových parametrů. Systémové parametry jsou volitelné uživatelem a aplikace poskytuje možnost simulace různých přenosových scénářů.
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Digital terrestrial television broadcasting DVB-T/H and DVB-T2
Pospíchal, Martin ; Ulovec,, Karel (referee) ; Kratochvíl, Tomáš (advisor)
Master's thesis compares the standard for digital terrestrial television broadcasting of the first generation DVB-T/H and the second generation DVB-T2 with particular emphasis on the modulator, a security channel interference, the signal from the transmitting environment itself and the modulation signal. The following description of specific models of transmission channels for fixed, portable and mobile reception of digital terrestrial signal. Comparison with the particular relates of the transmission parameters for different types of reception of digital terrestrial television with achieving efficiency and effectiveness of transmission at the level of laboratory measurements and computer simulation.
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Network planning for digital terrestrial television and radio broadcasting
Dostal, Radek ; Ulovec,, Karel (referee) ; Kratochvíl, Tomáš (advisor)
Master’s thesis is focused on SFN (Single Frequency Network) and MFN (Multi Frequency Network) networks design in digital television broadcasting based on DVB-T standard and digital radio broadcasting based on T-DAB standard. First part of the thesis is focused on the theoretical description of the MPEG-2 TS transmission, its propagation from transmitter across free space, to be decoded in the DVB-T receiver. In the second, practical part of the thesis, basic parameters of a software package for broadcast network design in RadioLab, RadioBase and Sítě SFN are introduced and the results are displayed on the digital terrain map and morphologic map. Within solution of this thesis was created signal coverage model of DVB-T digital transmitters in entire area of the Czech Republic, so called networks no. 1-4, according to its status in spring 2010, and its future expansion, which is known from TPP (Technical Plan of Conversion) document. At the conclusion of thesis there were made experiments with the modeling of transmitters’ radiated power, guard interval selection and location of DVB-T transmitters in the SFN network.
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Analysis of the transmission in the mobile digital audio broadcasting
Kresta, Daniel ; Ulovec,, Karel (referee) ; Kratochvíl, Tomáš (advisor)
This thesis deals with an analysis of a system called Digital Audio Broadcast and describes its mathematical model created in MATLAB program. In the first part basic blocks of a transmitter and a receiver are analyzed along with their principles. Then different types of transmission channels for static, portable and mobile receivers are described. The second part contains description of the DAB mathematical model itself. Individual blocks are described in the order of the DAB signal path, from the transmitter through the transmission channel to the receiver side. In this part the graphical user interface is also described. In the final part the results of experimental measurements and simulations are presented.
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Simulation of the Transmission Channels for the Digital Television DVB-T/H
Kučera, Jan ; Ulovec,, Karel (referee) ; Kratochvíl, Tomáš (advisor)
This thesis focuses on analysis, classification, simulation and assessment of the signal fading in the scope of terrestrial digital television reception. This is a phenomenon associated with signal multipath propagation caused by the reflection, dispersion and diffraction of electromagnetic waves in interaction with relief and artificial obstacles. Wave propagation issues in a specific landscape are not the central theme of this project. Signal transmission between the transmitter and receiver is defined by channel profile models. Attention is directed not only to static reception but also to portable and mobile reception. Simulation of this phenomenon takes place in the software environment of MATLAB. In the framework of this project program fundament was created which allows simulate the signal processing across the entire communication chain of television broadcasting, including its transmitting and receiving parts.
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Model of physical layer of communication system IEEE 802.11af
Saprykin, Yaroslav ; Ulovec, Karel (referee) ; Polák, Ladislav (advisor)
This diploma thesis deals with analysis, modeling and simulation of the IEEE 802.11af wireless communication system on the physical layer. When designing the solution, it is necessary to understand in details the features and specifics of the IEEE 802.11af system. The work is primarily describes the transmitting part of the communication system with emphasis on processing IEEE 802.11af signal. Subsequently the block diagram and the basic model are created for the transmitting and receiving parts in SISO and MISO broadcast modes. The model is implemented with graphical user interface in the MATLAB programming environment. This application is used to explore the features and performance of the IEEE 802.11af based on its system parameters. System parameters are user configurable what allows to simulate different scenarios. The application also supports simulation of fading channel.
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Analysis of the transmission in the mobile digital video broadcasting DVB-T2 Lite and NGH
Golubev, Martin ; Ulovec,, Karel (referee) ; Kratochvíl, Tomáš (advisor)
This master thesis is focused on description of the standards for mobile and portable receive of a digital television broadcast DVBT2Lite and DVBNGH. In MATLAB has been developed an application simulator with adjustable parameters of the transmitter and transmission channel. Application shows the constellation diagram of the received signal, resultant bit error and frequency characteristic of transmission channel. In this thesis are discussed simulation results with measured results from different simulation scenarios.
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Transmission analysis and measurements in digital television DVB-S/S2
Kaller, Ondřej ; Ulovec,, Karel (referee) ; Kratochvíl, Tomáš (advisor)
This master’s theses consists of theoretical introduction which includes basic search of referenced literature about digital television systems and picture quality classification. The results of signal character measurement of selected TV channels from satellites ASTRA 1E (DVB-S) and ASTRA 1L (DVB-S2) are provided. The energy budget calculation of downlink and results of 24-hour TS error rate measurement is included as well. The video quality by DVQL metric for each particular program of CS link stream was measured during full 24 hours.
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Simulation of the DVB-H and DVB-SH Transmission
Arvai, Luboš ; Ulovec, Karel (referee) ; Polák, Ladislav (advisor)
The paper deals with the channel coding and modulation in DVB-H and DVB-SH and with the simulation of the components in MATLAB. In the case of DVB-H the document also discuss the influence of different types of transmission channels on the transmission process. The first part of this work describes the channel coding and inner modulation in DVB-H and DVB-SH. The next part describes applications created in MATLAB for settings and simulation of the transmission in the standards DVB-H and DVB-SH. The last part of this document graphically presents selected results of the simulation of the transmission and discuss them.
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Model of physical layer of communication system IEEE 802.11af
Saprykin, Yaroslav ; Ulovec, Karel (referee) ; Polák, Ladislav (advisor)
Tato diplomová práce se zabývá analýzou, návrhem a simulací modelu fyzické vrstvy bezdrátového komunikačního systému IEEE 802.11af. V práci je především popsána vysílací část komunikačního systému s důrazem na zpracování IEEE 802.11af signálu. Následně je vytvořeno blokové schéma a model pro vysílací a přijímací části ve vysílacích módech SISO a MIMO. Model je realizován s grafickým uživatelským rozhraním v programovém prostředí MATLAB. Vytvořená aplikace slouží k prozkoumání vlastností IEEE 802.11af modelu na základě jeho systémových parametrů. Systémové parametry jsou volitelné uživatelem a aplikace poskytuje možnost simulace různých přenosových scénářů.
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