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Coexistence of LoRa and Wi-Fi in the RF band 2.4 GHz
Kaučiarik, Filip ; Miloš, Jiří (referee) ; Polák, Ladislav (advisor)
Diplomová práca sa zaoberá štúdiom koexistencie, ktorá môže nastať medzi bezdrôtovými komunikačnými systémami LoRa a Wi-Fi v bezlicenčnom ISM pásme 2,4 GHz. V teoretickej časti práce sú stručne popísané fyzické vrstvy obidvoch systémov. Následne sú definované spoločné frekvenčné pásma a koexistenčné scenáre, ktoré môžu vzniknúť medzi uvažovanými systémami v spoločnom rádiofrekvenčnom (RF) pásme. V experimentálnej časti práce je prezentované laboratórne meracie pracovisko, ktoré bolo navrhnuté na meranie rôznych koexistenčných scenárov medzi technológiou LoRa a Wi-Fi. Funkčnosť navrhnutej koncepcie je overená experimentálnym meraním. Výsledky meraní sú detailne komentované a prezentované. Je navrhnutá laboratórna úloha a vzorový protokol pre vzdelávacie účely v Laboratóriu Mobilných a Bezdrôtových komunikácií.
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Measurement and analysis of the DAB system
Kaštánek, Petr ; Kufa, Jan (referee) ; Polák, Ladislav (advisor)
This thesis deals with the measurement and analysis the performance of the Digital Audio Broadcasting (DAB) system. Theoretical part of the work contains a brief description of the signal processing chain of DAB. Attention is devoted to physical layer (PHY). In the experimental part of the work is designed and implemented laboratory measuring workplace for reception, processing and evaluation of DAB signal. The RTL2832U software defined radio (SDR) is used as a receiver of the DAB signal. The functionality of the proposed concept is verified by a detailed measurement.
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Coexistence of wireless communication systems and LTE in the ISM band
Mikláš, Michal ; Kratochvíl, Tomáš (referee) ; Polák, Ladislav (advisor)
This bachelor thesis deals with a definition, description and measurement of coexistence scenarios which can occur between LTE and WLAN (technology IEEE 802.11xx) wireless communication systems in the ISM band. Based on the common radio frequency (RF) bands, used by these systems, different coexistence scenarios are defined. Appropriate measurement testbed and method are proposed to measure coexistence between LTE and WLAN systems. Functionality of the proposed measurement testbed has been proved and extensive measurement of previously defined coexistence scenarios has been done. The obtained results are evaluated in details.
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Coexistence of wireless systems LoRa and Bluetooth
Paul, Filip ; Kratochvíl, Tomáš (referee) ; Polák, Ladislav (advisor)
Bakalářská práce je zaměřena na koexistenci LoRa a Bluetooth technologií v bezlicenčním 2.4 GHz ISM pásmu. Práce se skládá ze dvou hlavních částí, jmenovitě teoretické a experimentální. Ve své teoretické části se věnuje popisu fyzické vrstvy obou systémů a definuje koexistenční scénáře, které mohou mezi oběma systémy nastat. V experimentální části je navržen a zrealizován měřící testbed pro měření koexistenčních scénářů, které mohou nastat mezi LoRa a Bluetooth systémy v 2.4 GHz ISM pásmu včetně následného zpracování naměřených dat. Na závěr je navrhnuta laboratorní úloha a založená na experimentální části diplomové práce, která slouží pro edukativní účely pro kurz mobilních komunikací vyučovaný na univerzitě VUT.
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Co-existence of the still used and upcoming digital terrestrial television and mobile communication services
Plaisner, Denis ; Kratochvíl, Tomáš (referee) ; Polák, Ladislav (advisor)
This work deals with exploring, measuring and evaluation of possible coexistence scenarios between terrestrial digital TV (DVB-T/HT2) and mobile wireless services (GSM, LTE), which can occur in a shared RF frequency bands The DVB-T, DVB-T2 and LTE standards are briefly described. RF band, where these systems are operated, are outlined too. . There are defined different coexistence scenarios. For the measuring, monitoring and evaluation of these scenarios, an appropriate laboratory workplace is proposed and realized. Results from the measurements show various influence of interfering mobile services on the interacted DVB-T/H system, depending on the considered coexistence scenario.
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Coexistence of DVB-T2 and LTE in the 800 MHz band
Walach, Dominik ; Miloš, Jiří (referee) ; Polák, Ladislav (advisor)
This bachelor thesis deals with the study and evaluation of coexistence scenarios which can occur between DVB-T2 and LTE systems in the UHF band 800 MHz Both DVB-T2 and LTE systems are briefly described, and their common frequency bands are defined. An appropriate laboratory workplace is proposed and realized for the measurement, analysis and evaluation of the DVB-T2 and LTE coexistence scenarios. These systems work in adjacent or even in the same frequency bands. Thereby these systems can coexist, and different coexistence scenarios can occur.
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Laboratory workplace for measurement of DVB-T2 MISO broadcasting
Bárta, Vojtěch ; Kratochvíl, Tomáš (referee) ; Polák, Ladislav (advisor)
This bachelor thesis deals with measurement and analysis of DVB-T2 MISO broadcasts. The theoretical part of the thesis describes the broadcasting chain of the DVB-T2 system at the level of the physical layers. Attention is paid to both SISO and MISO transmit modes. In the experimental part of the work is to design a measuring workplace for monitoring and analysis of DVB-T2 MISO transmission in laboratory conditions. The functionality of the proposed concept and chosen measuring methodology was verified by a set of experimental measurements.
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Coexistence of LTE and LoRa in the 2.4 GHz ISM band
Potočňak, Martin ; Staněk, Miroslav (referee) ; Polák, Ladislav (advisor)
This diploma thesis deals with the study and measurement of coexistence scenarios that can occur between the LTE and LoRa systems in the unlicensed ISM band 2.4 GHz. A common radio frequency band in which LTE and LoRa systems can coexist is defined. An appropriate laboratory measurement is proposed and realized, allowing automatized measurement of the defined coexistence scenarios. For this purpose, a personal computer, professional measurement equipment and software MATLAB are utilized. Functionality of the proposed concept is verified by extensive measurements. The obtained results are graphically shown and discussed in detail.
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Estimating mobile coverage by means of regression
Walach, Dominik ; Raida, Václav (referee) ; Blumenstein, Jiří (advisor)
This diploma thesis deals with the use of freely available data sets to estimate the signal strength in localities where measurements are missing. This work aimed to use interpolation and regression methods to estimate as accurately as possible the possible signal coverage in a given locality. First, data sets were analyzed, based on results, a test model for various methods has been created. The methods with the best results have been implemented on real data sets containing thousands of measurements. At the end of the work, accurate estimates are commented and circumstances to reduce the deviation of the measured and calculated values are specified.
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Laboratory Workplace For Performance Measurement Of The Dab/Dab+ System
Kaštánek, Petr
In this paper, a simple laboratory measurement workplace, proposed for educational purposes, to measure the performance of the DAB/DAB+ signal is presented. The RTL2832U software defined radio (SDR) is used as a receiver of the DAB signal in the measurement setup. Freeware available program DAB Player is used to analyze the DAB signal on the objective and subjective level. The functionality of the proposed concept as well as the applied measurement methodology is verified by simple experimental measurements.
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