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Mobile communication systems with multiple antennas
Teplý, Lukáš ; Maršálek, Roman (referee) ; Klozar, Lukáš (advisor)
This term paper deals with the use of MIMO Technology in wireless systems intended for mobile communication. At the beginning are described the advantages of the MIMO Technology and the scheme of the communication channel. The communication occurs through communication channels where each channel has its own capacity and other parameters which are described in chapter two. The following chapter deals with the use of MIMO Technology in wireless network and with the wireless standards based on it. The next chapter applies the mobile communication standards LTE and LTE-Advanced. Their network is nowadays being built around the world. These standards are much more faster in comparison with the existing mobile network and enable to manage the increasing amount of “clever” telephones and of transmitted data in the mobile network. There are described the transfer framework structures and their transmission by this network. The end of this chapter pursues the network LTE working in the world and the situation in the Czech Republic.
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Security device with GSM module
Křístel, Jan ; Klozar, Lukáš (referee) ; Prokopec, Jan (advisor)
The Bachelor´s thesis the construction of electronic security system with GSM module. The security system will mainly guard both residential and business premises. The first chapter of study analyses detectors and their correct application. The next chapter describes purpose and functionality of each system component. The remaining chapters present the architecture of security control panel including description of functionality, assembly and block diagrams.
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Control unit for aeroponic growing system
Vrabec, Miroslav ; Dulík, Tomáš (referee) ; Klozar, Lukáš (advisor)
This thesis deals with the history of a method of plants cultivation without original substrate. The method is hydroponics and its subsequent development is called aeroponics. This work outlines the design of the whole aeroponic system including a control unit. The control unit has been designed to control the injection of nutrient solution, which is essential to the life of plants.Further, the control unit performs the control of lighting period, temperature, air flow and also regulation of nutrient solution pH. The control unit also keeps records of all data necessary for the monitoring process and for the evaluation of time differencies in the system.
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Measurement of mobile network parameters
Gábor, Tomáš ; Hanus, Stanislav (referee) ; Klozar, Lukáš (advisor)
This work deals with theoretical study and practical implementation of measurement and storing of mobile network parameters and following designing an programming web interface for their presentation. IT describes structure and development of GSM and UMTS networks. It also deals with satellite navigation system GPS and measuring module Telit UC864-G, which was used for measuring. The next step was to select a group of parameters that are important for calculating the quality of the signal path and to analyze process of storing the data into the database. In the end is completely described web interface and also all applied programming languages and methods.
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Localization system making use of GPS and GSM
Klozar, Lukáš ; Pust, Radim (referee) ; Šebela, Radek (advisor)
Aim of this master´s project is to analyse localization possibilities in GSM and GPS wireless networks. Choise of proper module and design location device for both GPS and GSM networks. Design and construction of system, which is able to designate it´s positron, using both GPS and GSM networks. The location informations, are send to Internet server, using GPRS system. Localization techniques in both wireless network are described. The system which is able to get position information was designed and constructed. The module´s driving software and the software, which process the localization informations and controls the database storing process, was designed.
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LED light with adjustable spectral radiation for breeding and growing
Satora, Ondřej ; Hrach, Petr (referee) ; Klozar, Lukáš (advisor)
The aim of my master’s thesis is the design of the LED lighting system for breeding and growing purposes as replacement for the classical high-pressure sodium lamps and other sources of light used today. The whole system can be controlled locally by buttons or remotely by web server using Ethernet interface. LEDs are powered by five-channel step-down converter with current feedback. Converters are controlled by pulse width modulation generated by microcontroller.
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Control unit for 3G wireless module
Vávra, Tomáš ; Hanus, Stanislav (referee) ; Klozar, Lukáš (advisor)
This document deals with theoretical analysis of types and parameters of 3G UMTS modules. Briefly describing basic terms and principles of cellular networks and Global Position System. UMTS modules are firstly described from general point of view and subsequently there is comparison of two specific modules. Part of this document is practical design of control unit for 3G wireless module Telit UC864-G. Design starts with analysis of the module features and subsequently there is description of design procedure that begins with block diagram and ends with circuit schematic and printed circuit layout. Last part of this document describes construction of controll unit, its testing and finally even testing of module itself through serial bus RS-232 from PC with use of program with grafic interface, which have been written for this purpose.
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Control unit for aeroponic growing system
Vrabec, Miroslav ; Dulík, Tomáš (referee) ; Klozar, Lukáš (advisor)
This thesis deals with the history of a method of plants cultivation without original substrate. The method is hydroponics and its subsequent development is called aeroponics. This work outlines the design of the whole aeroponic system including a control unit. The control unit has been designed to control the injection of nutrient solution, which is essential to the life of plants.Further, the control unit performs the control of lighting period, temperature, air flow and also regulation of nutrient solution pH. The control unit also keeps records of all data necessary for the monitoring process and for the evaluation of time differencies in the system.
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Signal propagation in mobile communication systems
Julínek, Pavel ; Hanus, Stanislav (referee) ; Klozar, Lukáš (advisor)
The aim of this thesis is to describe the basic principles and function of signal propagation in mobile communication systems. Closer look is taken at GSM and UMTS communication systems. The thesis deals especially with the problem of path losses, which occurs between transmitter and receiver. Possible propagation scenarios for cellular network are theoretically described. Also the propagation models for outdoor and indoor path loss prediction are described and simulated. The developed program estimates path loss and graphically represents the results of simulation for various model parameters, environments and scenarios.
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