| Summary: | 碩士 === 國立中央大學 === 通訊工程研究所 === 93 === COFDM (Coded Orthogonal Frequency Division Multiplexing) is used as the modulation method for the DVB-T (Digital Video Broadcasting-Terrestrial) system. The OFDM system has the ability to support high transmission data rate. Since the OFDM system is sensitive to carrier frequency offset and symbol timing error, how to make the synchronization perform well is an important issue.
In this paper, we study the synchronization problems which include carrier frequency offset and symbol timing offset in the DVB-T system. Then, we construct a solution for synchronization in the multi-path and heavy noise environment. Matlab simulations are used to explore the characteristics and efficiency of the solution we proposed. Finally, we design the synchronization modules by VHDL.
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