摘要
正交频分复用(OFDM)实际上是一种多载波调制技术(MCM)[1]。文章中使用的软件Optisystem则是由Optiwave system公司开发的一款光通信系统软件。它集成了设计,测试,优化光纤通信系统的功能。在本次仿真过程中,OFDM信号是由Matlab程序实现的,而信号在光纤链路中的传输则由Optisystem来完成。文章详述了OFDM信号产生,传输的原理,仿真设置过程。并对其性能指标进行了分析。
Orthogonal Frequency Division Multiplexing（OFDM） is actually is one kind of methods of Multi-Carrier Modulation （MCM）. Optisystem is a software developed by Optiwave system Inc. with functions of design, test and optimization in the field of optical fiber commxinication. In this simulation, we used Matlab program to generate an OFDM signal in the time field and then loaded this signal into Optisystem via the Matlab program interface. By observing optical/electrical waveform in time/ fre- quency field of each point of the transmission links, it is clear to observe how the original signal is transformed or modulated by Mach-Zehnder interferometer（MZI） or other components. Finally, by using Matlab program, we also analyzed different perform-ance between high-frequency and low-frequency subcarrier in channel based on their various the bit error rate.Key words：
出处
《信息通信》
2017年第8期48-50,共3页
Information & Communications
