Simulation and Evaluation of Ofdm Based Digital Video Broadcasting (dvb) over Different Wireless Communication Channels

Digital video broadcasting (DVB) is the television digital system. It’s however much more than a simple replacement for existing analogue television transmission, this system has many advantages such as picture quality and allows you a range of new features and services including subtitling, multiple audio tracks, interactive content and multimedia content. The main purpose of this paper is to develop and simulate a DVB system using the Matlab software – the language of Technical Computing. The system is based on the Quadrature Amplitude Modulation (QAM) and orthogonal Frequency Division Multiplexing (OFDM) technology, which allows DVB system to exploit the spectrum frequencies in a better way, saving spectrum. This paper analyses the construction of DVB-T system model using Simulink with the purpose of investigating the bit error rate (BER) performance analysis of the OFDM based DVB-T 2k mode using different modulation schemes in different transmission channels. .