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ISM band wireless transmission
Juráň, Jeroným ; Nešpor, Dušan (referee) ; Friedl, Martin (advisor)
This document summarizes the basic possibilities of communication using ISM bands. It also includes extracts from the ČTÚ regulation concerning usage of ISM bands. The theoretical part describes mainly the functions of chosen transmitter and receiver module. Secondly it describes the design and realization of transmitter and receiver devices including the C libraries for basic use, usable distance measurement and example application using developed devices.
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The Influence of Modulations in optical networks based on OTDM
Kočí, Lukáš ; Šifta, Radim (referee) ; Münster, Petr (advisor)
The bachelor thesis inquires into influence of modulations to transfer in optical nets, with the 320 Gbit/s zone width, based on the OTDM principle. There are also explained effects impacting on the signal transfer by optical fiber, single-mode and multi-mode op- tical fibers are described here and also principles of used technologies of multiplexing are explained. There is compiled the proposal of transmission system, which is subsequently simulated in the OptSim programme. On the initial simulation model there are the mo- dulation formats tested progressively, patterned on theoretic knowledges and its influence on the transmission quality is evaluated.
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Speed Measurement Using Radar
Martinů, Lukáš ; Široký, Vít (referee) ; Maršík, Lukáš (advisor)
Bachelor's thesis is focused on method of object's speed detection using a low-cost continuous wave radar module. In the first section, it describes differences between basic types of radar modules and their fundamental principles. The main part of thesis is dedicated to signal processing of radar modules K-MC1, K-MC4, that contents data to analyze moving objects. Doppler effect is used to determine the object's relative speed. Moreover, there is used FSK technique to measure the distance and there are solved issues associated with cosine factor. To verify the performance and stability, the application is tested on a several appropriate objects. In the end, the implemented application is evaluated and the possible continuation of this work is stated.
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Model of communication system with the PLC channel
Kovařík, Tomáš ; Krajsa, Ondřej (referee) ; Mlýnek, Petr (advisor)
The aim of this work was to develop a model of a communication system with the PLC channel. The model contains different types of modulations with the possibility of their settings. The impact of a disturbance on different numbers of states QAM modulation has been evaluated. The theoretical part describes the PLC technology with its functions and the most widely used narrowband modulation.
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Aeroplane model control using ISM 433 band
Juráň, J.
The aim of this work was to design multifunctional pair of devices for wireless transmission. Next goal was to use it to create RC model from hand launch glider to demonstrate wide possibilities of the developed system.
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FSK modem with AX.25 protocol
Vojtek, Michal ; Šebesta, Jan (referee) ; Fuchs, Michal (advisor)
The purpose of this thesis is to design FSK modem for Packet communication. In accordance with accessible literature was constructed functioning circuit schema and subsequently there was constructed a motherboard which is mainly assembled from SMD technology. It makes this modem mobile and very easy usable in terrain. Modem communicates with PC via USB bus. Also this bus is used as power source for this device. Communication between modem and PC is realized by KISS protocol and connection with tranciever is realized by AX.25 protocol.
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Design of new laboratory exercises in the course Access and transport networks
Ťupa, Martin ; Kyselák, Martin (referee) ; Škorpil, Vladislav (advisor)
In my final project there are proposed two new laboratory tasks for the subject Access and transport network. These tasks are focused on the problem of shift keyings. There are a lot of types of shift keyings, however, I directed my attention at the following ones – the Amplitude shift keying ASK, the Frequency shift keying FSK and the Phase shift keying PSK. I used TutorTIMS training system for measurement and observation. The aim of my final work is to collect both practical and theoretical information based on the shift keyings and help the Access and transport network students in the future.
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