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数字视频广播COFDM传输系统中的编解码技术

Channel Coding Technique in COFDM Transmission System for Digital Video Broadcasting

【作者】 郝东来

【导师】 葛建华;

【作者基本信息】 西安电子科技大学 , 通信与信息系统, 2002, 硕士

【摘要】 本文介绍了高清晰度电视发展的概况,阐述了COFDM传输原理和数字高清晰度电视地面广播系统的COFDM实现方案。在对COFDM传输系统中基于串行级联码的信道编解码性能进行Matlab软件仿真的基础上,完成了系统中FEC模块的Quartus仿真和FPGA硬件电路的实现。最后在此基础上,结合系统调试提出了用并行级联的Turbo码来替代串行级联码的方案,并通过性能仿真探讨了该方案实施的可行性。

【Abstract】 Based on an overview of HDTV, this paper gives the COFDM transmission principle and DVB_T COFDM scheme.On the basis of theory about channel coding, simulation of the performance on SCCC-based with Matlab has been done and a design scheme based on FPGA proposed.This paper makes the simulation of circuits with Quartus and FPGA-hardware into reality too. Finally,Turbo coding applicated in COFDM is discussed and its feasibility also tested by lots of performance analysis.

  • 【分类号】TN941.3
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