Research On Key Techniques Of Mobile TV Based On OFDM

In this paper, key techniques of mobile TV based on digital terrestrial broadcasting were researched chiefly. First, basic theory and the components of digital terrestrial broadcasting system are researched, the characteristics of wireless propagation channels and key techniques of digital terrestrial broadcasting system are studied. Second, the paper introduces the basic principles of OFDM, the synchronization algorithms of OFDM are researched and the performances of them are analyzed by simulation. Then DVB-T and DVB-H standards of Europe are researched. The steps of implementing interleaver and deinterleaver of DVB broadcasting systems based on reading and writing addresses of RAM were proposed in the paper. The technique of time slicing in DVB-H is studied and the effect of power conservation is researched by quantitative calculation. At last, computer simulation of DVB-H was implemented basing on the simulation platform, the BER performances of perfect channel, Rice channel, multipath channel of user-defined and mobile reception channel are getted and analyzed.