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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本文介绍采用相干接收方法的高密集度频分复用光纤通信的基本原理及实现这种接收方法的技术难点。

This paper introduces the fundamental principle of the high density FDM fiber optic communications with coherent reception and key points for its realization.

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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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