|
|
Wireless stopwatch
Hampl, Tomáš ; Pristach, Marián (referee) ; Bohrn, Marek (advisor)
This bachelor thesis describes the design and implementation of the system of the wireless digital stopwatch for timing. Stopwatch is implemented by microprocessor ATmega16 and the wireless transfer of data by module RFM22. The theoretical part of the work is focused on the description of the all used technologies. The practical part is focused on the design and overall realization of the system. For the processing of the measured results is programmed user application. The final result is the functional prototype of the device including software for microprocessors and computer.
|
|
|
Wireless Tire Pressure Monitoring
Hampl, Tomáš ; Čožík, Ondřej (referee) ; Levek, Vladimír (advisor)
This master‘s thesis describes the design of a system usable for wireless measurement of the tire pressure. The goal is to make a theoretical acquintace with the wireless measurement of a tire pressure. Within the master‘s thesis was suggested device at the block level. For individual blocks have been chosen specific circuits. For the device has been selected the pressure sensor SP100-7AT, the microcontrollers Atmega8 and Atmega16 and the wireless module RFM22. The result of the work is a functional prototype of device including software for microprocessors. Final solution was tested during the experimental measurement.
|
|
|
Wireless Security System
Matyáš, Jan ; Kočí, Radek (referee) ; Hanáček, Petr (advisor)
This thesis describes the design and implementation of portable wireless security device for monitoring object. The device consists of a control module allowing user to set and monitor current state of the measuring module which communicates with the control module wireless using the ISM band. The device is battery powered and highest possible battery life per charge is required.
|
|
|
Models of Control Channels in the LTE System
Miloš, Jiří ; Wieser, Vladimír (referee) ; Masopust, Jiří (referee) ; Hanus, Stanislav (advisor)
Dizertační práce se zabývá zpracováním signálu fyzických řídicích kanálů systému LTE a vyšetřováním bitové chybovosti při přenosu řídicí informace z vysílače do přijímače v závislosti na podmínkách příjmu. Práce je rozdělena do dvou hlavních částí. První část práce je zaměřena na simulaci přenosu řídicí informace LTE v základním pásmu. Jsou zde prezentovány vytvořené simulátory řídicích kanálů ve směru uplink i downlink. Simulace jsou provedeny pro všechny druhy nastavení systému a základní modely přenosového prostředí. Jsou zde popsány výsledky vlivu použití MIMO technologií na kvalitu příjmu řídicí informace především v únikových kanálech. Druhá část práce je zaměřena na možnost nasazení systému LTE ve sdíleném pásmu ISM (2.4 GHz). Jsou zde představeny základní koncepce použití, na jejichž základě je vytvořen scénář simulací. Kapitola dále popisuje tvorbu simulátoru koexistence LTE a systému Wi-Fi v přeneseném pásmu ISM 2.4GHz. Jsou zde uvedeny výsledky simulací koexistence LTE a rušivého systému Wi-Fi provedených dle vytvořeného scénáře. Výsledky simulací koexistence LTE a Wi-Fi jsou ověřeny měřením v laboratorních podmínkách. Toto porovnání je důležité z hlediska optimalizace simulátoru koexistence. Dle výsledků obou typů simulací a měření jsou stanovena provozní doporučení, která mají přispět k bezpečnému a spolehlivému vysílání a příjmu řídicích informací LTE i při nepříznivých podmínkách příjmu.
|
|
|
Wireless data transmission in ISM frequency band using Manchester encoding
Záděra, Zdeněk ; Němec, Karel (referee) ; Zeman, Václav (advisor)
This work is dedicated to the design and implementation of modules for the bidirectional transmission of data in the ISM band (Industrial, Scientific and Medical), used for private purposes, such as the transmission of telemetry data between mobile devices in the field. Delivery is solved by using RF modules RFM12BP the maximum power 500mW, these intelligent modules are controlled with microprocessor companies ATtiny2313 Atmel. Microprocessor is also used for the transfer of serial interface between computers and RF interface module. Utility for microcontrollers is written in C language development in middle CodevisionAVR. The project is designed in cooperation with the staff development center in Brno Honeywell.
|
|
|
Coexistence of the communication systems in ISM band
Nowak, Dan ; Kejík, Petr (referee) ; Prokopec, Jan (advisor)
The purpose of this work is to study the physical layer technology of the communication systems working in the ISM band, to describe coexistence mechanisms in the selected frequency band, consequently to create models of the physical layers in the Simulink interface, to simulate synchronous transmission of the devices and to modify the model in order to correspond with coexistence mechanisms described in IEEE standard 802.15.2. The practical part of this paper examines the effect of Wi-Fi device output power on the transmission speed during synchronous transmission with Bluetooth device.
|
|
|
Access Control System using BodyCom Technology
Křístel, Jan ; Zamazal, Michal (referee) ; Povalač, Aleš (advisor)
This master's thesis is primarily focused on the design of an electronic access control system using the BodyCom technology. The first section describes the working principle of this technology and its influence on human body. The second section shows an application of this technology in construction options of the electronic access control system.
|
|
|
Radiocommunication Monitor for ISM Band at 868 MHz
Frecer, Petr ; Zamazal, Michal (referee) ; Povalač, Aleš (advisor)
This thesis deals with the design and the realization of the radiocommunication monitor for the 868 MHz band. In the thesis, a description of licence-free radio bands complying ITU recommendations and ETSI standards is given. A special attention is paid to the 863 MHz - 870 MHz band. The transceiver CC1020 that forms the base for the monitor is described in detail. The circuit design, the monitor assembly and the firmware creation are presented step by step. The radiocommunication monitor is portable and battery powered. The monitor is able to display RF signals in the 868 MHz band, to indicate the frequency error of the transmitter and to receive FSK modulated signal. Demodulated data can be transferred to the personal computer via the USB.
|
|
|
Wireless communication modules for microcontrollers
Klíma, Jan ; Matěj, Zdeněk (referee) ; Fedra, Zbyněk (advisor)
The aim of this master’s thesis is analysis of wireless communication between mikroprocesors. The first part of the work are analysed the problems the wireless free ISM band. Mainly RFM12B and ZigBee module, which i these band work and ZigBee standart. The second part are described relazation board for both module. Further how programming ZigBee module. And at last programs for tested module.
|
|
| |
guest ::
