基于二维编/解码器的非相干OCDMA系统研究  

The Study of Incoherent OCDMA System based on Two-Dimensional Encoder/Decoder

作　　者：洪媛 徐宁[1] HONG Yuan;XU Ning(School of Optoelectronic Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210046,China)

机构地区：[1]南京邮电大学光电工程学院,南京210046

出　　处：《光通信研究》2018年第4期1-4,共4页Study on Optical Communications

基　　金：国家自然科学基金资助项目(61272084)

摘　　要：为提高非相干光码分多址(OCDMA)系统的安全性和光纤带宽利用率,采用p=5的素数码/素数码作为二维地址码设计了二维光编/解码器,并在OptiSystem软件中搭建了二维非相干OCDMA系统。仿真结果表明,二维非相干OCDMA系统能够实现信号传输。当存在多用户时,系统产生多址干扰(MAI),会恶化系统性能。仿真分析表明,在二维非相干OCDMA系统接收端引入光硬限幅器,可以有效抑制MAI,提高系统性能。To improve the security and optical fiber bandwidth utilization of incoherent Optical Code Division Multiple Access （OCDMA） system,the two dimensional optical encoder/decoder based on prime code/prime code in = 5 as two dimensional address code is proposed. Two dimensional incoherent OCDMA system is analyzed based on OptiSystem platform. The simulation indicates that the two dimensional incoherent OCDMA system is able to transmit signal successfully. The performance of OCDMA system is deteriorated due to the Multiple Access Interference （MAD when multiple users exist. Then the method to suppress the MAI is proposed. The simulation results show that MAI can be effectively avoided when optical hard limiters exist.

关 键 词：光编/解码器 二维非相干光码分多址系统 多址干扰 系统性能 

分 类 号：TN914[电子电信—通信与信息系统]