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Quality and accessability measurement of GSM network
Vondra, Marek ; Wieser,, Vladimír (referee) ; Hanus, Stanislav (advisor)
The thesis is specialized on a possibility of measuring qualities and availability of a cellular radio system and also on evaluation qualities, fruitfulness interface, permeability etc. It includes short description of a basic mobile technology. Further analysis of the possibility of measuring the mobile network and how implement the measure. It also includes a draft program for measuring and evaluation of the GSM network with help several tests by a mobile phone connected through the Bluetooth.
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High bit rate LTE mobile system
Ohera, Vlastimil ; Kejík, Petr (referee) ; Hanus, Stanislav (advisor)
Aim of thesis was to acquaint with architecture and process of signal in systems using broadband LTE wireless technology. Thesis in detail is described physical layer of system. Next there is described comparison of LTE and WiMAX and table with all present systems. Thesis also is contained information about tested LTE system in real traffic. Next aim was created simulation of LTE system in downlink and uplink. Interface was created for easier configuration of each characteristics of transfer and type of interference of useful signal. This interface is contained control of whole simulation and presentation of measured values. Measured data were processed into graphs, which show dependence of error rate BER on C/N of useful and interference signal.
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Data transmission in GPRS and EDGE networks
Slovák, Jiří ; Ries, Michal (referee) ; Hanus, Stanislav (advisor)
The thesis is conceived as a part of the laboratory task innovation in subject Radio and mobile communications. The main part of the project is to create a complex GUI application in MATLAB programming environment that mediates measuring of bitrate in GPRS and EDGE networks, communication with used modem via virtual serial port and consists of other related functions. The problematics is at first described in detail on theoretical basis with special focus on physical layer of mobile technologies mentioned above. In practical part, there are briefly outlined mechanisms that were used during development. The following part consists of a detailed description of the application itself, created using gained theoretical knowledge.
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Model of UMTS System
Srdínko, Milan ; Gleissner, Filip (referee) ; Hanus, Stanislav (advisor)
Spread Spectrum Communication techniques have been widely used in mobile and wireless communications. They have very beneficial features like antijam and security (noise-like character, pseudorandom codes usage). At first, the features of Spread Spectrum systems are described with emphasis on the Direct Sequence Spread Spectrum (DS-SS) scheme. Main specifications of UMTS system are also introduced. The goal of this thesis was to create the model of a physical layer UMTS suitable for investigation of disturbing signals influences in Matlab Simulink. This model was used to measure how the Bit error rate (BER) is affected by the Processing gain and the Signal-to-noise ratio. Finally, two important charts which describe the relation of Bit error rate versus the Processing gain and the Signal-to-noise ratio have been plotted.
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Special security system
Náhlík, Ondřej ; Masopust, Jiří (referee) ; Hanus, Stanislav (advisor)
This master’s thesis is focused on design and realisation of special security system for space and property protection. System is devided into two parts, transmitting and receiving. Transmitting part is formed by Raspberry Pi Model B+, motion sensor, webcam and USB LTE modem Huawei E398. Receiving part consists of computer with suitable application for communication with FTP server. Data transfer in mobile systems is described in the first part of this thesis, transmitting part is designed in the second part. There is one transmitting option chosen in the third part and there are also described applications of the transmitting part. The last part of this thesis is focused on the receiving part and its application.
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E-UTRAN Air Interface Description
Opletal, Prokop ; Kejík, Petr (referee) ; Hanus, Stanislav (advisor)
The aim of this bachelor’s thesis was to study a basic principles of wireless system LTE with a view to radio interface. Readers are familiarize with a basic concepts of system within a text, like modulation OFDM, which is principal for LTE technology. Further in text are shortly describe OFDMA and SC-FDMA technologies, which are employ in LTE downlink and uplink. There are also summarize parameters, which radically change a bit rate in LTE systems. In dependence on the theoretic knowledge was designed a model of LTE system in MATLAB. With this model were performed simulations of transmission of LTE signal through the radio channel.
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Security system using mobile networks
Svoboda, Adam ; Wieser, Vladimír (referee) ; Hanus, Stanislav (advisor)
This master´s thesis deals with design of security system, which transmits captured video using mobile systems. There are chosen representatives of cameras and motion sensors that could be used in the construction. The thesis also deals with the theoretical design of the transmission system, which consists of a camera, a motion sensor, an USB modem and a microprocessor, that manages all operations. There is also a proposed block diagram of a communication method. The security system is designed and tested in various conditions.
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Orthogonal Frequency Division Multiplex
Spurný, Jan ; Maršálek, Roman (referee) ; Hanus, Stanislav (advisor)
OFDM is now days very important and widely used modulation technology, which allows high transmission speeds and is able to be used within radio communication channels. The aim of this bachelor`s project is to gain understanding of OFDM modulation, and an analysis of the processing signals, which are used. And finally, form a block diagram of modulator and demodulator in MATLAB environment, which allows observing signal in time and frequency domain.
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GSM-EDGE and UMTS Systems Coexistence
Gleissner, Filip ; Hanus, Stanislav (advisor)
The dissertation thesis deals with the investigation of the coexistence of GSM–EDGE and UMTS systems with focus on the physical layer of the systems. The aim is to provide a set of recommendations for practical cooperation while the systems operate in both the separated and the common radio bands. A detailed description of signal processing of both the systems on the physical layer is presented. On the basis of this description, models of both systems were created and implemented in the MATLAB environment. The simulations are focused on the physical layer quality parameters, especially the bit error ratio evaluation for various ratios of useful signal power to noise power during the transmission over the radio channel. Simulation is also used to examine the quality of received useful signal while it is interfered by signals from the same and adjacent channels. The purpose is to determine the isolation between these adjacent channels, when the bit error ratio of the useful signal does not exceed a certain reference value. The simulation results are subsequently subjected to comparison with the results of the experimental measurements in laboratory conditions. Before the measurements are carried out, a study of possible interference types is performed. Consequently, the crucial parameters of the measuring equipment used are verified. From the results of simulations and measurements, the proposal of a minimum and recommended carrier separation between both the systems is presented in order to efficiently utilize the assigned frequency spectrum. Furthermore, for the cooperation in both the separated and the common radio bands, the necessary precautions are given for reaching the required isolation and thereby inter-system interference minimization.
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Physical layer model of LTE system
Kounek, Milan ; Wieser, Vladimír (referee) ; Hanus, Stanislav (advisor)
Master’s thesis deals with the signal processing in LTE system, specifically focuses on the physical layer. The first part describes in detail the signal processing at the physical layer of the LTE system. Based on the acquired knowledge of signal processing is created a block diagram that graphically describes the process of the signal processing. Next part deals with the created mathematical model, which is programmed in Matlab. This section describes the limitations of the model, configuration options and view simulation results. The last part shows the results of simulations and analyzed the results.
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