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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Impulzové modulace / Pulse modulations

Šiška, Martin January 2013 (has links)
This work deals with the analysis of pulse modulation issues, work is divided into six chapters. The first chapter of the thesis deals with pulse modulations as a whole. It explains the concept of modulation, the distinction between analog and digital modulation, and there is the basic classification of pulse modulation done. The second chapter focuses on the issue of non-quantized pulse modulation. For each modulation belonging to this group is verbally and graphically explains the principle of its activities. In the third chapter, which is similar to the second chapter, the work focuses on quantized pulse modulation. Again, each of these modulations explained its basic principle. It is also in this chapter outlines the design models in Matlab-Simulink. The fourth chapter presents calculations and tables with calculated values needed for simulations. In the fifth chapter, a comparison waveforms. It contains a discussion about the dependence of modulation on their parameters, parameters of the input signal and the sampling frequency. In the final sixth chapter deals with the early design concepts and detailed diagrams for the production of demonstration products.
2

Vysokorychlostní mobilní systém LTE / High bit rate LTE mobile system

Ohera, Vlastimil January 2009 (has links)
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.
3

Výkonový zesilovač pro pásmo krátkých vln / Shortwave power amplifier

Zamazal, Bořivoj January 2015 (has links)
This semestral thesis describes RF power amplifier design. In the first section of the work, the possible solutionsand a reflection on the possible solution are presented. In the second section, the principle and thesis for power amplifier design is described. In the third section, the power amplifier design, based on the theoretical knowledge, is described.
4

Výkonový zesilovač pro pásmo krátkých vln / Shortwave power amplifier

Zamazal, Bořivoj January 2015 (has links)
This master‘s thesis describes RF power amplifier design. In the first section of the work, the possible solutions and a reflection on the possible solution are presented. In the second section, the principle and thesi for power amplifier design is described. In the third section, the power amplifier design, based on the theoretical knowledge, is described and in fourth section the finaly construction solution and real parameters are described. The last part sumarized the results of this thesis.
5

Úzkopásmový PLC modem / Narrowband PLC modem

Novák, Pavel January 2016 (has links)
The theses is focused on the use of PLC technology. The aim of the thesis is creating device which communicates in a narrowband transmission frequency band. Transmission of communication between plc elements runs through the low voltage distribution network. The frequency and phase modulations are used in order to change the character of data signal. Transmitter and receiver parameters are subjects to the CENELEC standard. The theses gives more attention to the area of hardware build communication element rather than the area of programming.
6

Úzkopásmový PLC modem / Narrowband PLC modem

Novák, Pavel January 2016 (has links)
The theses is focused on the use of PLC technology. The aim of the thesis is creating device which communicates in a narrowband transmission frequency band. Transmission of communication between plc elements runs through the low voltage distribution network. The frequency and phase modulations are used in order to change the character of data signal. Transmitter and receiver parameters are subjects to the CENELEC standard. The theses gives more attention to the area of hardware build communication element rather than the area of programming.
7

Časovač pro RC modely / Timer For RC Models

Fišer, Ondřej January 2018 (has links)
This paper describes complete design of timer for RC models. Described timer has three PWM outputs. With these outputs it is possible to connect two independent servo-motors and engine controller. 1 signal. The whole is controlled by 8-bit microprocessor. The time records are stored in external EEPROM, that can be programmed using I2C. Paper further discuss design of programming, which can be easily programmed the memory of EEPROM by the PC or smartphone. The goal of this paper is to design and build high quality RC timer with accessories.
8

Detekce dronu v prostoru / Detection of a Drone in Space

Rydlo, Štěpán January 2019 (has links)
This master thesis purposes is create localization system using software defined radio. The purpose of this thesis is to create new localization system, which will be independent of existing systems. To create a localization system, we will use ADALM-PLUTO device to send and receive radio signals. This work contains a decription of serval possibilities how to create the localization system and description of their comunication.
9

Řízení světelných zdrojů s LED / Control of LED light sources

Břoušek, Adam January 2020 (has links)
This thesis deals with design of devices for control and regulation of LEDs. The document summarizes basic information about light, its origin and variety. This work discusses the effects of light on humans. There are also discussed the possibilities of lighting control with LEDs. The work includes a diagram that describes a device for controlling and controlling light for daylight and night light.
10

Model systému OCDM / The OCDM system model

Sekanina, Tomáš January 2021 (has links)
Master thesis The OCDM System Model is focused on problematics of multi carrier modulation techniques and in detail analyses the OCDM system. The first part of the work contains theoretical and mathematical description of digital communication system in general. The next part focuses on OCDM system and Fresnel transform, whose discrete form is kernel of the system. Digital model of the OCDM system is realized in programming language MATLAB. In the digital model is performed simulation of information from transmitter to receiver in AWGN and fading channel. The results are evaluated from the viewpoint of the system resilience against errors and achievable system throughput. The end of the master thesis is dedicated to mutual compatibility and comparison between OCDM and OFDM system.

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