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CDMA Network Capacity
Pasečný, Jan ; Kejík, Petr (referee) ; Hanus, Stanislav (advisor)
The Bachelor thesis deals with determining which factors influence the capacity of CDMA network. This type of network is now being used worldwide due to its huge increase in capacity when compared to other transmissions systems. The work contains summary of basic parameters of single-cell and multi-cell systems with reference to the capacity. Obtained results are assesed and compared at the end of the work.
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Cellular Network Coverage Model
Unzeitig, Lubomír ; Mikulka, Jan (referee) ; Gleissner, Filip (advisor)
This work deals with a mobile signal propagation in electromagnetic wave form in a real environment of city microcell. The electromagnetic wave passing through the city environment is affected by many kinds of mechanism. It includes especially diffraction along vertical edges of buildings, diffraction across building roofs and buildings or ground refraction. These mechanisms are time variable. If we want to predicate them, we have to use sort of approached model. For an experimental part of this work, the Berg’s recursive model with a possibility of path loses or signal level prediction in a selected microcellular system is chosen. The software for a cellular network coverage is created on the basis of this fact. Its advantage is a possibility of up to five base stations placing and many kinds of settings, e.g. operating frequency, base station transmitting power, base and mobile station antennas height etc. There is a possibility of system GSM 900, GSM 1800 or UMTS choice. The Berg’s recursive model features are checked by simulations on experimental and real maps of build-up area.
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Expertimental GSM jammer
Charvát, Jiří ; Prokopec, Jan (referee) ; Frýza, Tomáš (advisor)
This thesis describes GSM communication, the method of its jamming and design of a jammer for this band. This document is mainly focused on design of the jammer with the variable bandwidth of jamming and the variable level of output power. Requested parameters of jamming are set by a control panel with a LCD display. In this document there is a detailed description of each function block and connection between them. At the end of this thesis there are released measured results of designed jammer.
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CDMA Network Capacity
Pasečný, Jan ; Kejík, Petr (referee) ; Hanus, Stanislav (advisor)
The Bachelor thesis deals with determining which factors influence the capacity of CDMA network. This type of network is now being used worldwide due to its huge increase in capacity when compared to other transmissions systems. The work contains summary of basic parameters of single-cell and multi-cell systems with reference to the capacity. Obtained results are assesed and compared at the end of the work.
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|
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Expertimental GSM jammer
Charvát, Jiří ; Prokopec, Jan (referee) ; Frýza, Tomáš (advisor)
This thesis describes GSM communication, the method of its jamming and design of a jammer for this band. This document is mainly focused on design of the jammer with the variable bandwidth of jamming and the variable level of output power. Requested parameters of jamming are set by a control panel with a LCD display. In this document there is a detailed description of each function block and connection between them. At the end of this thesis there are released measured results of designed jammer.
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|
|
Cellular Network Coverage Model
Unzeitig, Lubomír ; Mikulka, Jan (referee) ; Gleissner, Filip (advisor)
This work deals with a mobile signal propagation in electromagnetic wave form in a real environment of city microcell. The electromagnetic wave passing through the city environment is affected by many kinds of mechanism. It includes especially diffraction along vertical edges of buildings, diffraction across building roofs and buildings or ground refraction. These mechanisms are time variable. If we want to predicate them, we have to use sort of approached model. For an experimental part of this work, the Berg’s recursive model with a possibility of path loses or signal level prediction in a selected microcellular system is chosen. The software for a cellular network coverage is created on the basis of this fact. Its advantage is a possibility of up to five base stations placing and many kinds of settings, e.g. operating frequency, base station transmitting power, base and mobile station antennas height etc. There is a possibility of system GSM 900, GSM 1800 or UMTS choice. The Berg’s recursive model features are checked by simulations on experimental and real maps of build-up area.
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