本文通过MATLAB编程实现正交频分复用（OFDM）的系统仿真，系统采用卷积码和交织码级连的差错控制编码。

This test realized emulational system of OFDM through MATLAB programming, adopted error control coding of concatenation of convolutional codes and interlaced codes.

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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DVB系统中卫星传输采用QPSK，有线传输采用QAM方式，地面传输采用COFDM(编码正交频分复用)方式。

In DVB satellite transmission system used QPSK, using QAM cable transmission, terrestrial transmission using COFDM (coded orthogonal frequency division multiplexing) way.

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