Investigation and Simulation of a Noise-Resistant 16-Qam Demodulator in A Dvb-T2 Standard Digital Tv System Using the Matlab/Simulink Program Environment
Abstract
In this work, a noise-immune 16-QAM demodulator in a digital television system of the DVB-T2 standard is investigated and modeled using the Matlab/Simulink software environment. The requirements for normalized technical parameters that determine the quality and noise immunity of a 16-QAM demodulator in the DVB-T2 standard have been analyzed and investigated. Various communication channels are modeled and investigated, such as: the Gaussian, Rice and Rayleigh channel to determine and measure the signal-to-noise ratio, the theoretical and practical influence of communication channels on noise immunity without a filter and with a filter. The results of researches on the dependence of the bit error probability and the number of bits received with an error on Eb/N0, the spectrum of 16-QAM signals and constellation diagrams are presented.