直接检测FSK－FDM光纤通信系统时域分析与计算机模拟

Time Domain Analysis & Computer Simulation of Direct Detection FSK-FDM System

光频分复用（ＯＦＤＭ）充分地利用了光纤传输带宽，扩大了通信系统容量，近年来取得了很大发展。文中根据ＦＳＫ－ＦＤＭ系统特性，介绍了一种时域分析方法，进行计算机数值解，给出了接收信号的眼图。通过眼图可以直观地分析系统参数对系统的影响，得到了系统参数优化设计值。

Optical frequency division multiplexing (OFDM) is an optical communication method which explores optical fiber band and expands the transmission capacity. In recent years,the research in OFDM has made great progress. To decrease the crosstalk and signal distortion, we need to optimize the channel parameters when we design an OFDM system. According to the characteristics of OFDM system,the paper describes a method of time domain analysis,offers the computer numeric solution and stimulates the eye pattern of the received signals. Then, by the eye pattern that illustrates the influence of the parameters on the system performance,the optimized value of the parameters is obtained.