DVB-T pilot sensing algorithms

Projecte final de carrera fet en col.laboració amb Linköping UniversityThe world nowadays is in the middle of a digital to analog TV transition where digital transmission technology is substituting completely the analog television. This is because digital transmission has many advantages in terms of spectral efficiency, flexibility and robustness which make it especially attractive over analog transmission. Digital Video Broadcasting for Terrestrial (DVB-T) is the DVB European-based consortium standard for the broadcast transmission of digital terrestrial television. This system transmits compressed digital audio, video and other data over an MPEG-2 stream, using COFDM modulation. This paper deals with a C++ application currently being developed to simulate a DVB-T transmission in different real channels in order to test several pilot sensing algorithms, compare them and determine in which conditions and scenarios their use is more appropriated. Therefore an emitted DVB-T signal has been generated and detected after crossing a channel. Channel models and detection algorithms have been chosen from existing ones. All the blocs are implemented as specified in the DVB-T standard (ETSI EN 300 744 V1.6.1). Throughout this paper performance of DVB-T is defined and all the technical details needed to understand the application are explained. The application developed and its functions are described. Finally, the obtained results are evaluated and discussed