Research On The Key Technologies Of Terrestrial Digital Television System Based On Microwave Transmission

Presently,digital and informational revolution has extended into our whole personal lives.The tastes of the viewers are improving,which results in the higher demand on quality and effects.These promote the development of digital TV.The digital broadcasting network,no matter at home or abroad,has been built.DTV standards are also constantly renovated.Terrestrial wireless digital video broadcasting is using microwave to transmit signals and realize signal coverage.It has lots of unique advantages,which makes this transport is widely used.It doesn't need long wired routes.The fail-over mechanism,flexibility and mobility of this way have expressed much better than others.However,there are lots of interface factors in wireless channels.The proposed system has difficult receiver and high complexity.So,we need to know how to reduce these negative factors,and how to refine the system.If you want to specialize in digital broadcasting,you must have a good command of the features of the microwave and the negative factors.Then,you can analyze what makes the digital signals get worse and choose the right method to solve the problem.This article mainly discusses the present situation,the future development and the standards of terrestrial wireless digital video broadcasting.It analyzes the SFN work and list the actual problems when we are building SFN.In the end,the paper show us how to test and optimize the network step by step according to the actual work.