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Parallelism in Digital Signal Processing
Mego, Roman ; Wyrzykowski, Roman (referee) ; Vágnerová, Jitka (referee) ; Frýza, Tomáš (advisor)
Dizertační práce je zaměřena na systémy pro číslicové zpracování signálů, jejich architekturu a možnosti vývoje softwaru. Text pojednává o základním rozdělení počítačových systémů z hlediska paralelního zpracování dat. Rovněž demonstruje chování nízkoúrovňových a vysokoúrovňových programovacích jazyků na vícejadrovém signálovém procesoru založeném na architektuře VLIW. Cílem dizertační práce je vytvořit nástroj, který může být použitý při implementaci DSP algoritmů na VLIW procesory s efektivností nízkoúrovňových programovacích jazyků, ale s výhodami vysokoúrovňových programovacích jazyků. Výsledkem je software, který využívá pro popis algoritmů graf signálových toků a generuje kód v jazyce symbolických adres.
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High-speed optical transmission systems
Pekárková, Kateřina ; Číž, Radim (referee) ; Münster, Petr (advisor)
The diploma thesis is focused on high-speed optical connections using optical fibers for transmission and transmission systems with speeds above 100\,Gb/s. In the first part of the work, the theory of the area of optical high-speed connections is discussed, especially the work is focused on the coherent type of data transmissions. Modulation and multiplexing formats, chromatic dispersion, modal and polarization modal dispersion, optical fiber attenuation and nonlinear phenomena are also described. The theoretical part of the work also deals with the description of the differences between coherent and non-coherent transmission methods and the description of coherent high-speed optical transmission and its components. The practical part contains two laboratory tasks that, using simulations in the VPIphotonics environment, compare two-state and multi-state modulation for systems with a transfer rate of 10\,Gbit/s and 100\,Gbit/s. The properties of these modulation formats are demonstrated using decision eye diagrams, constellation diagram and bit error rate values for different lengths of optical fiber, which are the output of the simulation environment.
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Design and Development of a Hardware Accelerator of Demanding Computations with Multiple FPGAs
Zach, Petr ; Levek, Vladimír (referee) ; Šťáva, Martin (advisor)
This master's thesis focuses on the design and development of a printed circuit board with multiple FPGA connected by a high-speed bus. The goal of the project is to design and develop a board that will be able to accelerate calculations of demanding algorithms in various applications such as image processing, machine learning, cryptography, and other algorithms from the field of digital signal processing. The first chapter introduces the field of hardware acceleration, focusing on the characteristics of chips used in this field and comparing them. The second chapter examines the possibilities of hardware accelerators on the market. The third chapter describes the conceptual design of a custom hardware accelerator. First, the conceptual design is introduced, explaining the structure of the device. Subsequently, the design of the prototype of this device and its implementation on a PCB are described in detail.
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Automatic detection of tool fracture in metal sheet punching
Kluz, Jan ; Rajchl, Matej (referee) ; Brablc, Martin (advisor)
This Bachelor thesis deals with the design and subsequent implementation of the realtime fault detection system during the sheet metal punching process with a tool of small dimensions (0.5 × 12 mm). The proposed system is important for significant ease of the operator's work, acceleration of the process of production, as well as saving of the company finance budget. The first part of this thesis deals with the theoretical background of the studied issue. The following part is a brief theoretical introduction to the field of digital signal processing. The next chapter presents methods developed for fault signals detection including speed enhancing and data flow reducing algorithms. The main examined methods were: frequency peaks, frequency bands, autocorrelation, frequency correlation methods and machine learning including deep machine learning. Deep machine learning of the neural network achieved the best results overall. Features from time and frequency domain were used for purposes of creating the classification model using machine learning. The possibility of developing the predictive maintenance system is also described, including research of this area in a modern industry. Subsequently, the achieved results and their evaluation are presented. The end of this thesis is dedicated to the description of the implementation of classification system into realtime form and connecting this system to the punching press computer using Arduino Uno microcontroller and basic signal control electronics. The proposed system has been successfully assembled, tested and put into on-site testing.
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Digital signal processing using field programmable gate arrays
Vykydal, Jan ; Kubíček, Michal (referee) ; Kolka, Zdeněk (advisor)
This thesis deals with the design, implementation and testing of an equipment that performs spectral analysis of a gamma radiation, based on the evaluation of pulses from a scintillation detector. The pulzes are pre-amplified and digitized, and their further processing takes place numerically in an FPGA, which allows a simple modification of the function of the developed device. After an introduction to the issue of gamma radiation spectroscopy with a focus on its detection, the thesis is devoted to the development of a multichannel analyzer hardware, whose individual parts are further described later. Next, the development of a digital signal processing system in the FPGA is described. Followed by an analysis of a microcontroller firmware, and a text protocol for the controlling of the device. Finally, the results of the work are discussed, with a focus on the test measurement of gamma radiation.
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Homology search using digital signal processing methods
Kamar, Yana ; Jugas, Robin (referee) ; Maděránková, Denisa (advisor)
Thesis includes the theoretical introduction to molecular biology and genetics on the necessary level, including a description of the structure of DNA and the homologous gene. Described are fixed and physic-chemical kinds of nucleotide mapping, methods for processing digital signals. Numerical representations of genes that were programmed in MATLAB: unwrapped and accumulated phases, density vectors. Using the unwrapped phase and density vectors with windows of different lengths was performed CDS searching in the entire genome by calculation metric distances (euclidean and canberian) and correlation. Also, using the metric distances, a homologous gene was found in more or less similar bacterial genomes. The result is the approximate threshold of distance (euclidean and canberian) using to find homologous genes in genome.
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Research of dynamics features comparing audio records
Zemánková, Šárka ; Smékal, Zdeněk (referee) ; Kiska, Tomáš (advisor)
This work deals with the analysis of parameters related to the dynamics of sound recordings. It contains a brief description of the history of sound processing in analogue and digital form and the process of audio signal processing nowadays. The following chapter includes selection of the most suitable parameters for describing an audio recording, especially those describing the dynamics. This work further characterizes the methods used in similar researches in the world. There is also a system designed to calculate 43 dynamic parameters and the possibilities of their analysis are outlined as well. 35 different interpretations of one musical work were compared. Finally, the calculated parameters were drawn into scatter plots and evaluated using visual cluster analysis.
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Digital signal processing from MEMS microphones
Koníček, Cyril ; Pristach, Marián (referee) ; Fujcik, Lukáš (advisor)
Proposed bachelor thesis is focused to the filter design for digital signal processing from digital microphone (MEMS type). The microphone types, structure of AMDP421 digital microphone and digital filter types are described in details. Selected filters are modelled, designed and simulated in MATLAB tool to meet the filter specification. The results are sufficiently commented and assessed. Afterwards the digital filters are described in VHDL language and implemented to the target FPGA circuit. In frame of the work the extended modules to SPARTAN 3 STARTER KIT are developed and designed to evaluate and demonstrate the proper function of the proposed filter design.
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Design of bandpass digital filter
Dvořák, Vojtěch ; Pristach, Marián (referee) ; Fujcik, Lukáš (advisor)
The aim of this work is to explain the problems of digital IIR filters, demostrate process of designing digital filters in Matlab and design a model of ideal band-pass filter with concrete parameters in Matlab. This filter will then serve as a reference model for verification with the filter described in VHDL.
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Web-Based Demonstration of Linear Filtering
Novotný, Ondřej ; Bařina, David (referee) ; Černocký, Jan (advisor)
The aim of this work is to create a demonstration application of discrete linear filtering. The introductory section summarizes the theory of digital filtering and filter design. The following chapter describes the existing applets. Subsequently, the concept of the demonstration and its implementation are described. The final part contains tutorial examples of using the demonstration and summary of users' reactions.
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