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THE REDUCTION OF SIGNAL DYNAMIC IN ORTHOGONAL FREQUENCY DIVISION MULTIPLEX SYSTEMS
Urban, Josef ; Lúč, Andrej (referee) ; Galajda,, Pavol (referee) ; Maršálek, Roman (advisor)
This doctoral thesis is focused into the area of multicarrier radio communications systems. These systems are perspective for current and incoming mobile communications and wireless networks. Advantages of multicarrier systems like better multipath propagation resistivity are redeemed by some disadvantages. The high peak to average power ratio of transmitted signal belongs to these disadvantages, for its inconvenience for high efficient power amplification. The thesis concerns with peak to average power ratio reduction methods for OFDM systems, that belongs to the most used multicarrier systems. One of the main objectives is the modification of the existing methods with the intention of complexity reduction. Following subject of interest is the analysis of suitable methods combinations possibilities for more significant peak to average power ratio reduction. One part of this thesis is research of influence of these methods on the OFDM signals with different parameters.
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Implementation of laser technology
Urban, Jan ; Mouralová, Kateřina (referee) ; Osička, Karel (advisor)
The aim of this thesis is to describe the replacement of wire cutting laser cutting for cutting inserts made of hard material. Description of current situation in the company Vydona, tender and choice of laser and the need for post-laser workshop. The next section deals with the cutting of a particular sample. The last part of the technical economic assessment are calculated hourly rates of machines and the time and cost loads of different cutting inserts.
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Garage Control System with Remote Supervision
Urban, Jakub ; Kaczmarczyk, Václav (referee) ; Arm, Jakub (advisor)
This bachelor’s thesis describes control system of garage with remote monitoring. The first part is only theoretical and it deals with automation elements of the garage. Next part describes the choice of appropriate platform and its means of programming. Following part describes means of control of the garage door. Final part is dedicated to remote monitoring.
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GSM alarm for motorcycles
Beníček, Martin ; Fedra, Zbyněk (referee) ; Urban, Josef (advisor)
The main target of this work is to design and to implement unfailable safety appliance for motocycles with use any GSM technology. In my masters’s thesis I applied to individaul fields which I had to knows for realization of this work. The introductory chapter tells the reader about evaluation of former semestral projects and about brief description of the realized mechanism. It is followed by descripctoin of principles of communication between PC and mobile phone. The main part of my work is dedicated to application itself. The applicaton is called motoalarm. The last chapter creates description service of localisation mobil phones which is called Kde je... The conclusion includes evaluation of this master´s project and general description of the realized mechanism.
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Self-priming pump
Urban, Jiří ; Hudec, Martin (referee) ; Pochylý, František (advisor)
Diploma thesis is focused on self-priming pump 25 - OVE Sigma pumpy Hranice s.r.o., for its function is essential the ejector which is placed in the body of the pump. On the basis of the results of measurements there are designed construction modifications using a mathematical model. For the first time were made measurements to verify the self-priming capability with determining the maximum suction height.
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ARKOV eCommerce portal project
Urban, Jiří ; Tichý, Martin (referee) ; Dydowicz, Petr (advisor)
The intent of this work is to make internet communication between customer and company more effective. The work will evaluate the possibilities of new e-Commerce company portal development and it’s design, including on-line connection with ERP system of the company SAP Business One. The result of this work will be a recommended proposal of the best and as well as cost friendly solution for the company.
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