Implementace OFDM modulace na bázi softwarově definovaného rádia (SDR) pro vnitřní komunikaci viditelným světlem (VLC)

Abstract

The diploma thesis deal with communication with visible light (VLC), theory of orthogonal frequency division multiplexing (OFDM) and measurement of basic parameters for data transmission such as bit error ratio (BER), signal level and transmission rate. In the theoretical part of the thesis there is an explanation of what communication by visible light is. Second part describes the OFDM multiplexing, along with its communication scheme. The second chapter contains a description of the practical measurement of the thesis and the description of the measuring set, with the respect to the harware solution and the software aplication in LabVIEW. In the third part of t he thesis, there is the evaluation of all measured and calculated results, such as bit error ratio, signal level and transmission rate. The last but one part of the thesis is devoted to the discussion of the problems that occurred during the measurements. Finally, the evalutaion of the entire thesis is summarized at the end of the thesis.