| Based on an overview of HDTV, this paper gives the COFDM transmission theory and DVB_T COFDM scheme.On the basis of synchronization theory in multi-carrier modulation,it analyses the symbol timing recovery, frequency offset estimation and sampling clock offset estimation in principle. Simulation of some algorithms with Matlab has been done and a design scheme based on FPGA proposed.This paper also makes the simulation of circuits with Quartus and FPGA-hardware into reality.
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