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Power Line Communication - demonstration test bed
Jureková, Petra ; Fujdiak, Radek (referee) ; Mlýnek, Petr (advisor)
This thesis is focused on data communication through electrical power grid - PLC Power Line Communication (PLC). It describes PLC communication, its present possibilities and two main types of transmission - broadband and narrowband, which are compared in detail. Major topic is an impact of noise on PLC signal and effect of growing distance on transmission efficiency. Within that is processed the analysis of distance and noise influence. Practical part of the thesis contains many types of measurements focusing especially on broadband modems. Measurements were performed both in the home and in the laboratory environment. The results show the effect of the distance and interference on the network throughput and the spectral power of the PLC signal. The RFC2544 methodology was also used for measurements.
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Application of GPRS module for real-time transmission of JPG files
Rusinský, Jan ; Hošek, Jiří (referee) ; Dostál, Otto (advisor)
This document describes a design procedure of interface between VGA camera and GSM/GPRS modem for displaying JPEG pictures captured by camera on website. Interface is realized by eight-bit micricontroller ATMEL with application written in C language. For picture transfer to server a TCP/IP stack is implemented into modem. The document is divided into two main parts. The first part describes architecture of the system, used components (camera, modem, microcontroller) and electronic circuit design. The second part of the document is focused on the software for the system. Firstly operating system of modem is desribed, OpenAT development environment for modem application design and WIPsoft library, which is used to implement TCP/IP stack. Next is described application for microcontroller which controlls camera and modem. Last part of this document describes server application and web interface.
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Narrowband data transmission over the power lines
Valenta, Jaroslav ; Mišurec, Jiří (referee) ; Mlýnek, Petr (advisor)
This bachelor´s thesis is focused on narrowband data transmission over power lines. At first are described possibilities of narrowband data transmission over power lines, next the type of noises and then thesis deals with parameters of communication channel. In this thesis are described too modulation, error corection and data encryption for reliable communication. In the last part of thesis are realized practical measuring in laboratory workplace. The influence of data communication on primary function of power lines are tested. In the end are realized measuring of noise influence on data communication.
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Influence of physical parameters and age of power lines on PCL/BPL performance and reliability
Janás, Jan ; Mlýnek, Petr (referee) ; Benešl, Lukáš (advisor)
With the increasing demands on data transmission, other ways are being sought than standard data transmission via conventional data cables. One of these ways is communication over power lines - PLC or BPL technology. This method of communication is widely used in households, energy, industry and other fields where it is used for data collection, communication, or control of various devices. Before considering the use of BPL technology, it is first necessary to evaluate the considered power line to see if it is suitable and technically competent for this purpose.
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Testing of ZigBee wireless modems
Kasper, Robin ; Molnár, Karol (referee) ; Martinásek, Zdeněk (advisor)
This thesis deals with the testing of wireless radio modems CDX800. Modems communicate in the unlicensed 869MHz band and are based on the ZigBee standard. The first chapter is devoted to the description of this standard. Thesis aims to test the modems according to RFC2544 and RFC1242 recommendations for testing networks, which are discussed in the work. For testing of the network in accordance with those recommendations have been selected hardware testers Trend Unipro GbE. Testers are primarily intended for Ethernet networks, and therefore it was necessary to use converters from Ethernet to serial line which modems use to communicate with other devices. Measurements of the testers were unsuccessful by virtue of inappropriate choice of converters. The work shows potential substitute for these converters. Furthermore, the work deals with testing the modems in terms of radio range on the line of sight and in build-up area. For this purpose was chosen service program Radwin. At the conclusion of the work was created network design for decentralized wastewater treatment for the community Podbřezí from the measured parameters. Designed network is composed of 50 stations and one control center.
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Universal communication unit
Ružička, Michal ; Mlýnek, Petr (referee) ; Sláčik, Ján (advisor)
This bachelor thesis is going to deal with communication over the power network. Aim of this project is to clarify this issue and consequently to use the acquired knowledge for desingning own communication unit. The basic parameters of power network which influence this type of communication are being described in this thesis. The concept of universal communication unit is created. Pheripheral solutions are chosen for this concept and the given device will be made of them. The custom communication unit is created on this basis. The funkcionality of this unit is tested in the work.
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Data transmission in GPRS and EDGE networks
Slovák, Jiří ; Ries, Michal (referee) ; Hanus, Stanislav (advisor)
The thesis is conceived as a part of the laboratory task innovation in subject Radio and mobile communications. The main part of the project is to create a complex GUI application in MATLAB programming environment that mediates measuring of bitrate in GPRS and EDGE networks, communication with used modem via virtual serial port and consists of other related functions. The problematics is at first described in detail on theoretical basis with special focus on physical layer of mobile technologies mentioned above. In practical part, there are briefly outlined mechanisms that were used during development. The following part consists of a detailed description of the application itself, created using gained theoretical knowledge.
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USB Host with PIC Microcontrollers
Kučera, Pavel ; Janoušek, Vladimír (referee) ; Hanáček, Petr (advisor)
The aim of master thesis is implementation of USB host in a microcontroller PIC. The thesis contains description of ways of peripherals to computer connections with detailed description of USB bus. There are also discussed several approaches in implementations USB host for embedded systems. A concept of layered USB host system is designed on the basis of analysis of the state of the art. Finally, the designed system is implemented in microcontroller. Resulting firmware of development kit is tested on real USB device.
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Narrowband Power Line Communication with Yitran module
Chernikau, Ivan ; Sysel, Petr (referee) ; Mlýnek, Petr (advisor)
This bachelor’s thesis is focused on a narrowband data transmission over power lines. At first, possibilities of the narrowband data transmission over power lines were described. Then we focused on the properties of a narrowband modem Yitran IT700. A communication between modems was tested in different modes. Different dependences were measured (dependence of the data transmission speed on the distance, dependence of the error percentage on the distance and on the impedance). Experiments took place on the usual power lines at the Faculty of Electrical Engineering BUT in the building T12. Then an application for remote control of a relay through power lines on the base of PLC communication and Yitran modems was designed and implemented.
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Modem - repeater for narrow band technology of PLC
Bednář, Jan ; Mlýnek, Petr (referee) ; Mišurec, Jiří (advisor)
Bachelor’s thesis is focused on PLC communications, particulary on PLC modem. For starters it is necessery to learn about basics of PLC, learn how is PLC transmited, advantages and disadvantages. In the next part i will focus on modem itself, choosing a suitable communication unit by given parameters, creating external circuits to adjust the signal for our purposes. At last i will design printed circuit, realize the modem and verify its funcionality.
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