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PAPR reduction in OFDM and simulation in Scilab
Maňák, David ; Maršálek, Roman (referee) ; Urban, Josef (advisor)
Main goal of this dissertation is read over principal and properties of the OFDM modulation. Onward we become acquainted with basic methods for PAPR dynamics reduction in OFDM such as Clipping or Interleaving. Simulation of reduction methods will be realized in Scilab environment, in which are made basic functions for OFDM modulator and demodulator. Furthermore there are created functions for PAPR reduction methods. All established functions are implemented in the GUI.
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WRC Specification Cars
Urban, Jiří ; Svída, David (referee) ; Dundálek, Radim (advisor)
In this bachelor’s thesis are introduced and briefly described the most important functional parts of WRC specification sport car in light of constructional solutions, specialities and differences from stock produced car. The car is primary designed for racing in World Rally Championship under the auspices of International Automobile Federation FIA. Finally is shortly outlined possible future evolution of this motorsport category.
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Communication Strategy for Company Ježek
Urban, Jan ; Zatloukal, David (referee) ; Šimberová, Iveta (advisor)
The goal of the submitted thesis: “Analysis of company´s communication mix” is the analysis of the company´s present communication mix and proposal of a new mix. The study is divided into two parts, theoretical and practical. Theoretical part discusses the established methods of analysis a company´s internal and external environment, describes and compares particular tools of marketing communication and its principles in the theoretical level. Introduction of practical part introduces selected company. Main part analyses company´s environmental and particular tools of promotion. Last part gives proposals of the new communication mix.
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Optical characterization of perovskite nanostructures
Urban, Jakub ; Kvapil, Michal (referee) ; Dvořák, Petr (advisor)
The present bachelor's thesis focuses on the optical characterization of CsPbBr3 nanocrystals ranking among the group of materials called perovskites which are remarkable for their high photoluminescence (PL) quantum yield. An algorithm for a correlation of experimental data measured by PL mapping with morphological and topological properties obtained by using Scanning Electron Microscopy and Atomic Force Microscopy has been developed which clears the way for a particular crystal detection and their spectrum analysis. Specifically, crystals the shape of which can be approximated by a cuboid have been detected and the volume dependence of the centre of mass of their PL, which is proportional to V^(-2/3) as predicted by the theorethical model, has been discovered. The measurement of PL dependency on temperatures ranging from 40 to 60 °C has also been conducted and in this temperature interval linear dependence of the full width at half maximum of their PL spectral line that rises with rising temperature has been confirmed. On the contrary, the centre of mass of PL has been found to be temperature independent.
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Variants of the first separation stage with two-stage water treatment
Urban, Jaromír ; Látal,, Milan (referee) ; Biela, Renata (advisor)
The subject of this bachelor thesis is to introduce the possibilities of the first separation stage with the two-stage treatment of raw water for drinking water. The thesis is divided into the theoretical and practical part. At the beginning of the theoretical part, I make research of raw water sources, requirements for their quality, the possibilities of water treatment for raw drinking water and the distribution of water treatment plants according to the number of separation stages. In addition, the first separation stage for two-stage water treatment is described in more detail, equipment and technology used for a given level of treatment and detail information of the individual types of the first separation stage. In the practical part of the thesis, two selected types of the first separation stage - settling tank and clarifier for specified design flow Q = 80 l/s are calculated. The following drawings are based on previous calculations. For the proposed rectangular settling tank with a horizontal flow and a clarifier with a mechanical float cloud, the ground plan, longitudinal and cross section are processed.
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Urban viaduct in Povazska Bystrica
Kaut, Tomáš ; Urban, Jiří (referee) ; Nečas, Radim (advisor)
The content of the diploma thesis is design urban bridge in Považská Bystrica. From three possible options was selected one, which represents cable stayed bridge-extradosed with four spans. This selected option was elaborated in detail in this diploma thesis. Design procedures and assessments were performed to comply with ultimate limit state and serviceability limit state according to valid europeans standarts. The calculation model was performed in program Midas Civil in logitudinal axis and in SCIA Engineer in transversal axis. Structural assessment were done manually. The part of the diploma thesis are detailed drawings and visualizations.
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Multicarrier modulator and demodulator for software defined radio
Klučka, Jaroslav ; Urban, Josef (referee) ; Maršálek, Roman (advisor)
This thesis deals with computer simulation of the communication chain using the OFDM modulation. In the beginning of my thesis there is a brief description of digital modulations, especially OFDM. The model of the transmitter, radio channel and receiver, including a simple timing and frequency synchronization and equalization is designed and simulated in the Matlab environment. There is a designed communication system implemented into USRP development board in the Simulink environment. The development board could not work simultaneously as a transmitter and as a receiver. Function of the transmitter was verified by measuring on spectrum analyzer. Testing OFDM signal using the arbitrary waveform generator CompuGen 4302 was generated for the verification of the function of the receiver. Testing signal was received and demodulated on the development board which works as a receiver.
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Prestressed bridge No. 202 on the expressway R2 in Slovakia
Janek, Tomáš ; Urban, Jiří (referee) ; Koláček, Jan (advisor)
My diploma thesis deals with design of the bridge number 202 on expressway in Slovakia. The bridge leads across the road number I50 (between Trenčín and Bánovce nad Bebravou) and railway number 130 (between Trenčín and Chynorany). For each course there is a separate super-structure. Only left super-structure is considered for the work. The box girder with four spans is chosen from three variations. This bridge is designed according to limit states, construction´s influence on design is taking into consideration. Structural model of construction is made as a spatial bar model. Structural analysis, well arranged drawings and visualization are elaborated in this thesis too.
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The study of the reconstruction of the pool water treatment plant of the summer swimming pool Břeclav
Urban, Jaromír ; Látal,, Milan (referee) ; Biela, Renata (advisor)
The subject of the diploma thesis is to introduce the problems of communal spas, namely the treatment of water for swimming pools. Following is a proposal of reconstruction of the treatment plant for a real, operated area of the summer swimming pool. The thesis is divided into theoretical and practical part. At the beginning of the theoretical part I make research of the history of balneology, the effects of bathing and swimming on the human body, possible resources for spa purposes and hygiene requirements for these waters. I also describe commonly used methods of treatment of swimming pool water. In the practical part I first describe the summer swimming pool in the town of Břeclav. There is a description of the swimming pool, its history and equipment. In the next chapter I present the currently operated technological line. Based on a personal visit, the next chapter evaluates the technical condition of the plant. Based on this evaluation, a new technological line for treatment of swimming pool water of the Břeclav summer swimming pool is proposed.
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