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Compensation of Temperature Instability of the Received Signal Level of Microwave Links
Repa, Pavol ; Musil, Petr (referee) ; Bubniak, Milan (advisor)
This thesis deals with the field of microwave links. Specifically, it is concerned with compensating for the temperature instability of the received signal level of microwave links. This problem is solved according to the proposed algorithm, which can be used to suppress the temperature waveforms, and thus achieve better results in the calculation of collisions in the Telcorain software application. A compensation algorithm has been developed to compensate for microwave links with strong temperature dependence. By~compensating for these non-compliant microwave links, it was possible to reuse them in the calculation of the average rainfall intensity, and hence they were retained in~the~generation of the 2D rainfall maps. The compensation algorithm is implemented in the~Telcorain application, where the individual results of the precipitation calculation can be verified. Throughout the thesis, microwave joints from two manufacturers, each with a~different technology used, were analysed. Their comparison with each other is~the~focus of this thesis, in which the individual differences between these microwave links are published.
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Acceleration of Particles Tracking on CBM Experiment
Roth, Michael ; Kolář, Martin (referee) ; Musil, Petr (advisor)
The focus of this work is to research various methods of particle track reconstruction in the CBM experiment, and the problem of hardware acceleration of these methods. The advantages and disadvantages of the extended methods were discussed and a reconstruction method based on cellular automata and Extended Kalman filters was selected for further study. In particular, the thesis details the development of a simulation model suitable for generating test data to facilitate the implementation of the selected tracking algorithm, which was subsequently sped up using distributed computing methods. Two different particle simulation models and a reconstruction algorithm were implemented, with the reconstruction algorithm offering up to 800 per cent speed up factor in respect to the sequential algorithm and up to four orders of magnitude lower memory complexity.
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Using Synthetic Data for Improving Detection of Cyclists and Pedestrians in Autonomous Driving
Kopčilová, Zuzana ; Musil, Petr (referee) ; Smrž, Pavel (advisor)
This thesis deals with creating a synthetic dataset for autonomous driving and the possibility of using it to improve the results of vulnerable traffic participants' detection. Existing works in this area either do not disclose the dataset creation process or are unsuitable for 3D object detection. Specific steps to create a synthetic dataset are proposed in this work, and the obtained samples are validated by visualization. In the experiments, the samples are then used to train the object detection model VoxelNet.
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Secure web application for surface temperature monitoring based on machine learning methods
Hejna, Jan ; Bubniak, Milan (referee) ; Musil, Petr (advisor)
The bachelor thesis is focused on the exploration of the influence of solar radiation on the measured temperature by temperature sensors in microwave devices and on the possibilities of quantifying this influence. The thesis explores the possibility of using these devices to measure ambient temperature using selected machine learning methods. The aim was to create a secure web application that will be used for area-based ambient temperature monitoring, thus expanding existing networks of meteorological measurement points. The theoretical part of the thesis focuses on the technology of microwave links and the environmental influences that affect the measured temperature of these devices. In the practical part of the thesis, a correlation analysis was performed between the measured temperatures from different telecommunication equipment technologies and the temperatures of the surrounding meteorological stations. The analysis aimed at selecting an appropriate technology for ambient temperature prediction. The next part of the practical work involved the process of training a machine learning model. The last part involves the development of a web application that displays temperature maps of the Czech Republic.
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Design of a system for detecting devices connected to the electrical network
Homola, Michal ; Kováč, Daniel (referee) ; Musil, Petr (advisor)
This master thesis deals with the creation of a system for detecting devices connected to the power network using the measurement of high-frequency noise obtained via BPL modems. In the theoretical part, there was an introduction to the issue of PLC, electromagnetic compatibility of EMC, the issue of impedance in PLC and noise characteristics in PLC. In the practical part, measurement of noise characteristics for individual devices and the creation of a dataset took place. The dataset, which was then tested on five machine learning models selected for this task based on their properties. Finally, the suitability of each model for our application was evaluated.
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Design of a BPL modem with an ethernet interface
Malček, Ladislav ; Rusz, Martin (referee) ; Musil, Petr (advisor)
The task of the master thesis is the review of selected module PLC Stamp 1200, which provides data communication via power-lines. Subject of the first part is description of PLC communication and its types, especially BPL communication. Afterwards transmission lines, communication interfaces and couplers for injecting the signal into the lines are described. Next, general procedure of design printed circuit boards is presented, followed by specific application rules for prototype BPL modem, especially for RMII and RGMII interfaces. In the second part the design of printed circuit boards for BPL modem is presented. Next, the results of measurement of modem prototype and final device is provided. In the last part of the master thesis, there is a design and results of testing of noise coupler for injection of noise into transmission lines. This device is used for BPL modem testing in worsened conditions.
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Broadband over powerline modem
Mahút, Michal ; Šilhavý, Pavel (referee) ; Musil, Petr (advisor)
The aim of the diploma thesis is to look into the issues of Broadband Over Powerline Communication, design and construct a BPL modem. The theoretical part of the thesis covers the division and description of Powerline Communication, its standards, and factors affecting communication over electrical wiring. The practical part includes the design of a printed circuit board for the BPL modem with the selection of necessary components for the modem construction. The output of the thesis is a constructed broadband PLC modem, whose transmission properties and interference resistance are compared with commercially available solutions.
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Impact of devices connected to powerline on selected BPL topologies
Mahút, Michal ; Musil, Petr
The following article deals with the impact of device originated noise on BPL (Broadband over powerline) communication for different topologies of BPL modems. In household scenario, every device connected to power line has an impact on transmission spectrum and limits throughput. Different topologies and two types of devices were tested and evaluated. The aim of this article is to determine the appropriate connection of BPL modems into the powerline with the lowest possible decrease of data throughput.
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Evaluation of broadband couplers for noise injection into powerlines.
Malček, Ladislav ; Musil, Petr ; Mlýnek, Petr
This paper deals with the problem of coupling noise into the transmission power line. The main goal is development of device which can effectively inject noise into transmission lines. This device will be used for testing industrial or commercial-used BPL (Broadband Powerline) modems and their ability to communicate under certain conditions. In the first part, there is an overview of coupler types. Next, the appropriate type was chosen according to required qualities. PCB (Printed Circuit Board) design of final device was developed on the principle of capacitive coupler. In the end, final PCB design was tested with several combinations of magnetic coils and capacitors.
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