National Repository of Grey Literature 53 records found  previous11 - 20nextend  jump to record: Search took 0.00 seconds. 
Secure PC Connection
Winter, Jan ; Škarvada, Jaroslav (referee) ; Kubek, Ján (advisor)
Aim of this master's thesis is the creation of serial communication interface for FITkit. This serial interface is a full duplex industrial bus based on 20mA loop circuit and it should allow connection of two FITkits by RS-485. Aim of this paper is to design simple software allowing communication of two FITkits and to secure this communication on RS-485 link against interference or transfer errors.
FITkit as a Remote Controller Transceiver
Růžek, Michal ; Strnadel, Josef (referee) ; Vašíček, Zdeněk (advisor)
The bachelor's thesis is about communication protocols used in infrared remote controls of consumer electronics. It describes widely used protocols such as RC5, NEC and SIRC, their properities and methods of decoding. Transceivers are realized via components inside FITkit's FPGA chip, using simple HW module. Demo application written in C language is also included.
Using radio-orientering principles for mobile robot localization
Maixner, Jiří ; Povalač, Aleš (referee) ; Chromý, Adam (advisor)
Localization of a mobile robot is one of the most important areas of basic support for the operation and navigation of robots in space. This work deals with robot localization based on the principle of radio-orienteering. There is also described the production of transmitter and SDR receiver, which can be used for localization.
Design of suitable HW and SW components for remote data transmission
Pietrowicz, Daniel ; Marada, Tomáš (referee) ; Němec, Zdeněk (advisor)
This thesis is focused on the design of remote data transmission equipment, without access to mains power. The device will measure the voltage of the gas pipeline and send this information to the operator for processing. Analysis of today's technologies for long-distance transmission and based on the selected technology, the device will be designed. According to selected components, its power supply will be designed with the aim of long-term functionality and continuous operation.
Wireless Messaging System
Machatý, Jiří ; Rozman, Jiří (referee) ; Sekora, Jiří (advisor)
This project proposal describes the involvement of a wireless pager. It describes the possibility of realization, block diagrams of the receiver and transmitter controlprogram for their individual and flowcharts. In the theoretical design are taken intoaccount the ease of use, durability and endurance of the battery function. Was chosenfor the realization of a suitable wireless module, with a sufficient range. The goal is todesign a suitable wireless pager with sufficient range, durability and reasonable price that could be used within a department or a house to call for help.
Software-defined radio OFDM frame generation according to IEEE 802.22
Honek, Marek ; Gazda, Juraj (referee) ; Maršálek, Roman (advisor)
Tato práce navrhuje nový radio komunikační standard AWRAN určený pro přístup k radioamatérké síťi HAMNET která nevyžaduje volný LOS k přístupovému bodu. Dále se práce popisuje prototypovou implementaci zjednodušených rámců tohoto standardu na SDR a testovací aparaturou, která je používána pro tyto účely. V první kapitole je představen standard IEEE 802.22 WRAN, ze kterého AWRAN vychází. Jsou popsány pojmy jako OFDM a OFDMA, výhody a způsoby jejich použití. Dále jsou zde popsány také modulační techniky PSK a QAM, kódování pro detekci a opravu chyb přenosu a zdroje těchto chyb. V druhé kapitole je zevrubný popis parametrů navrhovaného standardu AWRAN. Jsou popsány OFDM parametry, struktura rámců a superrámců. Je popsán způsob co-existence více buněk AWRAN a přesná podoba čtrnácti řídících zpráv, které umožňují efektivní rozdělení zdrojů přenosového pásma mezi až čtyři základnové stanice a až 63 uživatelů pripojených ke každé z těchto stanic. Třetí kapitola popisuje strukturu zjednodušeního rámce, který byl implementován na testovací aparatuře RPX-100. Popisuje i aparaturu samotnou a její základní stavební hardwarové prvky i softwarovou knihovnu, která byla pro implementaci zjednodušeného rámce použita. V této kapitole je popsán i připravený testovací spoj a teoretický výpočet útlumu tohoto spoje. Čtvrtá kapitola se zabývá programy, které byly v rámci této práce vytvořeny. Dva z nich sloužily pro první seznámení s hardwarem a softvarovými knihovnami. Další program slouží jako generátor dříve popsaných zjednodušených rámců, které následne odesílá za použití SDR. Ten stejný program slouží i jako příjmač těchto rámců. Poslední připravený program provádí simulaci bezdrátového přenosu pomocí matematického modelu kanálu. Dále počítá závislost BER na SNR u takto simulovaného přenosu. V poslední kapitole jsou vypsány funkce, které byly nadefinovány a použity v programech popsaných v předchozí kapitole.
Transceiver and TNC for Data Communication in UHF Band with CC1020 Chip
Hlavica, Petr ; Šebesta, Jiří (referee) ; Urbanec, Tomáš (advisor)
The aim of Master’s thesis Transceiver and TNC for Data Communication in UHF Band with CC1020 Chip is design of unit, which provides a data transfer by the packet radio net. It is an experiment, whether CC1020 chip is possible to use for TNC design. The thesis consists of study AX25 a KISS protocols, study of CC1020 features, design of PA and LNA and programming control software for Atmel AVR microcontroller.
Transmitter of PD MIDI messages
Čepl, Josef ; Kubánek, David (referee) ; Káňa, Ladislav (advisor)
The bachelors thesis consider in problems of MIDI communication in musical industry with a view to control external sound module assist in user-simply equipment. For the realisation were chosen facilities such as microprocessor, keyboard and LCD display. Product will extend possibilities of usage musical instruments which, except playing, doesn’t dispose the ability to control external MIDI compatible modules. The transmitter will involve to MIDI system from between instrument and possible reflected end use device. Software will specialize on programming language C, which is one of the most wide-spread. There is development environment freeware WinAVR which supports even C language. Technology of AVR programmers will allow implementation of the program to microcontroler. The first part of thesis is analyse of MIDI interface used in commercial reachable musical systems from specification of the interface to types of messages. The second part contains of detail solution with aspect on it’s practical use to potentional user. The conclusion sumarizes of work and possible other updates and actualizations of manufacture.
Spread-spectrum Communication System
Machala, Pavel ; Šimek, Milan (referee) ; Číž, Radim (advisor)
The thesis focuses on issues around communication system with the Direct Spread Spectrum Signal Signal. This work outlines the theoretical analysis of this technique and subsequently is created a communication system concept. The device concept is adjusted so that the device can be used as a laboratory device, presenting the spreading technique. This thesis offers a comprehensive and detailed description of the communication system construction, including design of transmitter, receiver and a common transmission channel. In conclusion are stated the results of devised communication system.
Accuracy assesment of underground spaces electromagnetic localization method
Skulina, Radim ; Machotka, Radovan (referee) ; Kratochvíl, Radim (advisor)
The aim of this diploma work is accuracy assesment of underground spaces electromagnetic localization method and comparison with results made by Ing. Matin Šklíba in 2006. Existing Purpose-built geodetic control Býčí skála and previous measuring for past 15 years was used for accuracy assessment.

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