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Classification of Radar Detections Using Convolutional Neural Networks
Láníček, Adam ; Zemčík, Pavel (referee) ; Maršík, Lukáš (advisor)
Cílem této práce bylo vytvořit mechanismus klasifikace detekcí z radaru pracujícího v pásmu milimetrových vln. Práce představuje systém pro zakódování radarových dat do obrázku a dále specializovaný anotační nástroj pro podporu vytváření datových sad cílených pro použití v You Only Look Once (YOLO) metodách detekce objektů. Na datové sadě vytvořené na základě radarových snímků z cyklostezky vykazoval tento detektor úspěšnost 91%. Na základě této skutečnosti lze konstatovat, že moje řešení je důkazem proveditelnosti tohoto přístupu, který lze dále rozvíjet směrem k docílení vyšší přesnosti detekcí, případně jej přizpůsobit speciálním potřebám a prostředím.
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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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Classification of Radar Detections Using Convolutional Neural Networks
Láníček, Adam ; Zemčík, Pavel (referee) ; Maršík, Lukáš (advisor)
Cílem této práce bylo vytvořit mechanismus klasifikace detekcí z radaru pracujícího v pásmu milimetrových vln. Práce představuje systém pro zakódování radarových dat do obrázku a dále specializovaný anotační nástroj pro podporu vytváření datových sad cílených pro použití v You Only Look Once (YOLO) metodách detekce objektů. Na datové sadě vytvořené na základě radarových snímků z cyklostezky vykazoval tento detektor úspěšnost 91%. Na základě této skutečnosti lze konstatovat, že moje řešení je důkazem proveditelnosti tohoto přístupu, který lze dále rozvíjet směrem k docílení vyšší přesnosti detekcí, případně jej přizpůsobit speciálním potřebám a prostředím.
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Educational needs analysis (research)
Charvátová, Eva ; Reichel, Jiří (advisor) ; Šnýdrová, Ivana (referee)
Graduation theses considers training needs analysis at concrete company's call center. Analysis goal is to find out reason of insuficient service in areas concerning company education. The theses mentions exploring key areas and formulize key question of research, which is what employees know about education. Taking decision aboute qualitative type of research and data acquisiton method, such as questionnaire, observation and document analysis, follows. Collected data are transcribed and encoded to allowed deeper analysis. Theses proofs that level of knowing between the employees is not sufficient and homogenous. Suggested action plan concern immediate change of communication and following education structure and long term recommendation, which is need of new, proper and complex analysis. Theses describes regular procedure advised by technical literature as well as true experience including changes forced by call center operating.
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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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