文章在分析地面传输信道特性的基础上，介绍了地面广播数字电视的DVB - T标准，探讨了其核心的正交编码频分多路复用COFDM技术、前端发射设备的系统结构及其优缺点。

Base on the analysis of terrestrial transfer channel, the paper introduces the DVB-T standard, and discuss the core COFDM technology as well as front-end transmit system structure.

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在中国数字电视广播地面传输标准(DTMB)中，使用了非规则准循环ld P C码(QC - LDPC)作为前向纠错编码的核心部分。

In Chinese national standard for Digital Terrestrial Multimedia Broadcasting (DTMB), irregular Quasi Cyclic LDPC (QC - LDPC) code is used as core part of forward error correction coding.

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