|
|
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.
|
|
|
Properties of the physical layer of ZigBee
Humpolík, Tomáš ; Frýza, Tomáš (referee) ; Prokopec, Jan (advisor)
The ZigBee standart works on using physical and data link layer of IEEE 802.15.4 standart. Three bands were defined (2.4GHz, 915MHz and 868MHz). There was also number of physical layers defined, each of them using one of the three bands and number of modulation and spreading functions. This thesis is focused first of all on specification 2,4GHz physical layer, which is world-wide used because this band can be used (with observace of the local rules) without license. Thesis is in its first part focused on modulation function, as well on used spreading functions and number of channels for each physical layer. In the second part is paid attention to demonstration kit by ATMEL Corporation, which enables associate a simple network in star topology and using the network for demonstration of simple functions of associated devices, and kit by Radiocrafts corporation, which is used in laboratory work. Laboratory work is focused on characteristics measurement during data transfer.
|
|
|
Design of reconstruction the damaged streambed Rusava in the village Rusava
Zelíková, Gabriela ; Bajza, Rostislav (referee) ; Uhmannová, Hana (advisor)
Design of reconstruction the damaged streambed Rusava in the village Rusava The task of this thesis is to evaluate the existing capacity of the streambed and design the reconstruction of Rusava river km 26,000 to 28,230. Rusava watercourse takes place in urban area of village Rusava in Zlín region. Channel revetment was badly damaged by floods in July 2011. The assessment of the current state of the watercourse was based on personal visit of the place and taken photos. Current state was modeled in HEC – RAS 3.1.3 software. The reconstruction is designed according to the assessment of the current river channel condition and also contains proposals for new buildings on the river.
|
|
|
Minimizing the effect of interference on wireless network
Doležal, Jan ; Kyselák, Martin (referee) ; Škorpil, Vladislav (advisor)
This thesis is concerned the technology with technologies of transfer through wireless devices. It is about possibilities of optimization of transfer in wireless net, especially of the reduction of interference influence. The first part is about theory and the standards development of wireless technology. There are methods and principles used in wireless technologies. The second part is a practical measuring and testing of an internal wireless net, with the emphasis being on the source of interference influence. Measuring was focused on interference between access points and was not about meteorological influence. It continues with theory and testing of interference of the microwave oven in our wireless net. Then, it is a practical demonstration of interference in an external environment. There are practical examples of interference between different providers’ nets on the same area and solutions to prevent or to cancel this interference. In next part of work the wireless net is parsed and described in a given territory. Here is described the way how to precede the reciprocal interference and eventually how this mutual disturbance suppress. Consequently, our net is optimized for customer growth and for today’s options of newer and more powerful components for wireless transfer. Finally there are two laboratory tasks. The first one is about practical measuring and testing of wireless net’s parameters and the second one is about simulation of wireless networks in the Opnet program.
|
|
|
The design of the multipurpose small water reservoir
Pitka, Roman ; Dobešová, Renata (referee) ; Doležal, Petr (advisor)
Master´s thesis aims to design multipurpose reservoirs in the river basin Žlebovský potok in cadastre Vysoké Popovice. The main purpose of the reservoir will be improving the drainage conditions in the basin of the river and revitalization. The reservoir will be designed according ČSN 75 2410 – Malé vodní nádrže. The master´s thesis consists of a text section, hydraulic calculations and graphic attachments.
|
|
| |
|
|
The quality of assembly in data transmission
Šalplachta, Milan ; Křepelka, Václav (referee) ; Filka, Miloslav (advisor)
The content of this work is theoretical and practical an analysis of transmission characteristics of structured cabling and related effect of assembling, which directly affects the characteristics of channel. Individual treshold limits of channel parametres, as technological methods of montages are outgoing from corresponding european specifications.
|
|
|
Effects of restoration and renaturation measures applied on watercourses
Brychtová, Anna ; Matoušková, Milada (advisor) ; Králová, Magdalena (referee)
This work focuses on the effects of restoration on watercourses, in particular on a planned restoration of Klíšský brook in Ohře basin and a finished restoration of Rokytka in Běchovice. The main goal is to use the methods HEM and MoRPh for evaluation of hydromorphology in both areas. In case of Klíšský brook, HEM is used to estimate ïts future condition after restoration. Another goal is to assess and propose a vegetation structure for the of Klíšský brook restoration, then to describe it on Rokytka. Research on the topic of river restoration, their goals and effects is included, as is an introduction to in the Czech Republic less known method MoRPh. The results of hydromorphological and vegetation structure assessment are introduced. Both utilised methods show adverse hydromorphological conditions on Klišský brook in comparison to Rokytka. Vegetation also shows higher diversity around and in Rokytka's channel. This work is a base for further monitoring of hydromorphology and vegetation evolution in both areas. The results from Klíšský brook were also used in its restoration proposal. Key words: river restoration, renaturation, hydromorphology, channel, riparian belt, flood plain, riparian vegetation
|
|
|
Reconstruction of the inlet channel to the turbine
Hanuš, Roman ; Perla, Jan (referee) ; Strnad, Jiří (advisor)
The subject of this bachelor's thesis is designing the reconstruction of the watercourse leading to the mill complex in the Bohumileč village in Northern Bohemia. A proposal for a new safety weir has been developed on the watercourse, connecting to the existing dam with its original weir in an unsatisfactory state. A diagnostic survey and assessment of the original reinforced concrete channel in the former mill building, which has been supplying water to the water turbine since 1914, have been conducted.
|
|
|
The design of the lateral variant of the dam Skalička
Vahalík, Zbyněk ; Galatík, Prokop (referee) ; Říha, Jaromír (advisor)
This diploma thesis deals with the design of the lateral variant of the dam Skalička. The introduction part describes the area around the dam, followed by the history and the current situation. The following part process the design of the dam's location, its integration into the terrain, the development of the shape and composition of the dam's cross and longitudinal section. The diploma thesis includes the design of the inflow and the outflow object, cross section of the inlet channel including its longitudinal section, as well as the implementation of the dam's water management solution and assessment of the reservoir’s transformation capacity. The thesis is supplemented by hydrotechnical calculations.
|
guest ::
