Digital Tv Terrestrial Mobile Broadcast Coverage Optimization Studies

Digital television is the latest achievement of TV set after black-and-white television and colorful television. The process of transferring digital TV from theory of digital technology to practice in reality is inevitably full of various challenges. The covering ways of digital TV are respectively by satellite, by cable, and by terrestrial. There is no breakthrough in analogue TV, digital TV satellite and covering way by cable. However, as to the covering way by terrestrial, due to its complicated information transmission line, there exists great challenge in theory construction and technology implementation.This thesis, combined with the experiment of digital TV terrestrial broadcast of Shandong Television Station (including choices of transmission standards, places, equipment, test parameters and etc in experiments), presents a comprehensive analysis of various digital TV standards and programs of China and other countries, offers a comparison of their performances, and proves the feasibility of popularizing the achievements of the experiment.The thesis contains the scientific data from the experiment as well as the improved scheme in theory and practice formulated on the basis of examining the covering effects of the experiment. In the scheme, present a theoretical demonstration of the measures of improving the land covering of digital TV. The demonstration encompasses the effect of an increased broadcasting power to covering area, the beneficial influence of a changing antenna experiment system to the covering effect of digital TV, and the bettered land broadcasting equality when the unit driver which have advance technology of digital beforehand distortion adjust replaces the unit driver which use analogy beforehand distortion adjust technology .By implementing the scheme in experiment, increasing the broadcasting power and applying unit of driver with advanced digital processing technology,...