The thesis describes the operation of fourth generation mobile networks, with an emphasis on the radio part, as it was originally standardized, unless otherwise stated within the text.
The first part presents the overall architecture of the access and backbone network. Specific elements and importance of interfaces and protocol stacks for their interaction. The following chapter shows in detail the composition of the radio signals, multiplexing and modulation methods, the structure of radio frames, the importance of the Fourier transform, orthogonality of sine waves, multi-antenna assemblies, transmission channels and signals and at the end, the application of these in the case of the initial access of the terminal to the network. The final section presents planning approaches in building fourth-generation base stations. It describes the four stages of design, from the initial rough calculations to the final adjustments, maintenance and optimization.
In the practical part of the thesis we verified the operation of existing commercial implementation of base stations in the suburban area by measuring system parameters and key performance indicators according to a predetermined measurement methodology. The measurements included the time required for the passage of the terminal into active mode, round trip time of packages, response time of the domain name system, the data transfer rate, the mean opinion score of web page loading times and strength of the received signal. They are shown in histograms and tables of key values. Visible are the advantages and disadvantages in the reception of radio signals in different frequency ranges, different bandwidths.
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