Simulation & Performance Analysis of DVB-T System Using Efficient Wireless Channels

This paper presents the critical comparative analysis of efficient wireless channels using the modeling of Digital Video Broadcasting (DVB) system. In the last few years, the telecommunication industries´ development has focused on an intensive use of broadband systems, which are characterized by high quality features. For this issue, new technologies with lower Bit Error Rate abilities have been designed. That is the fundamental of the wireless communication system that allows a fast deployment as well as efficient channel modeling. Digital Video Broadcasting (DVB) is a set of internationally accepted open standards for digital television, maintained by the DVB Project. This system is much more than a simple replacement for existing analogue transmission. The paper helps to understand the concept of effective modeling of a DVB-T system with the proper use of various types of wireless channels under appropriate circumstances. In this paper, we build up a DVB-T simulator which is designed for digital terrestrial television services to operate within the existing VHF (Very High Frequency) and UHF (Ultra High Frequency) spectrum allocations for analog transmissions, 50-230 MHz and 470-870 MHz respectively including digital modulation, OFDM modulator and demodulator, different channel models such as AWGN, Rayleigh and Rician fading channels. In the first phase the modeling and simulation of DVB-T system has been presented along with different types of channels. In the second phase the comparative analysis of AWGN, Rayleigh and Rician channel has been done under practical scenario by taking the various values of Bit Error Rate and S/N ratio as well as Doppler shift.