基于相干检测技术的RoF-WDM-PON系统研究

发布时间：2018-03-09 08:28

本文选题：光载射频(RoF)　切入点：WDM-PON　出处：《北京交通大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着互联网技术的发展,高清视频、互动直播等新业务的兴起,用户对网络带宽的需求越来越大,因此对与用户联系最为紧密的接入网技术提出了更高的要求。将能够有效利用毫米波带宽资源、接入灵活的光载射频(RoF)技术与具有巨大带宽优势、能满足多种业务需求的波分复用型无源光网络(WDM-PON)技术相融合,成为了未来解决接入网传输速率和用户需求等问题的最佳选择之一。将具有高接收灵敏度的相干检测技术应用于RoF-WDM-PON的融合系统,则可以进一步延长传输距离,提升系统的传输性能。论文围绕WDM-PON技术、RoF技术和相干检测技术,主要进行的研究工作如下:(1)分析RoF与WDM-PON的基本原理与关键技术,理论推导了基于外调制器的光载毫米波信号产生的原理。搭建仿真模块,实现了双边带(DSB)、单边带(SSB)和光载波抑制(OCS)三种调制方式的光毫米波信号的产生,比较三者的频谱结构并分析不同调制下生成的毫米波信号的特点。(2)理论推导相干检测技术的基本原理,分析比较M进制相移键控和正交振幅调制两种高阶调制的特点。搭建基于相干检测技术的16QAM传输系统,仿真分析传输中非线性效应的影响,以及相干检测中各数字信号处理模块的作用。(3)提出一种基于偏振复用与相干检测技术的RoF-WDM-PON融合系统。在方案设计中,通过偏振控制,分别调制正交偏振方向的载波,使得接收端在不需要引入独立激光器的情况下,可同时完成零差检测和外差检测,实现有线信号和无线信号的分发。此外,该方案也实现了载波重利用,即从下行传输中分离出纯净载波用于上行传输。通过搭建仿真系统,对误差矢量值(EVM)曲线及信号星座图等仿真结果进行分析,验证了该方案设计的可行性。
[Abstract]:With the rapid development of Internet technology, high-definition video, interactive broadcast and other new business on the rise, the user demand for network bandwidth is more and more big, so the contact with the user to put forward higher requirements for access network technology closely. The effective use of millimeter wave bandwidth, flexible access optical RF (RoF) technology with huge bandwidth advantages, can meet various service requirements of WDM passive optical network (WDM-PON) technology integration, has become one of the best choice to solve the access network transmission rate and user demand in the future. With the fusion system and high receiver sensitivity of coherent detection technique in RoF-WDM-PON, you can further extend the transmission distance, improve the transmission performance of the system. Based on WDM-PON technology, RoF technology and coherent detection technology, the main research work is as follows: (1) analysis of RoF and WDM-PON The basic principle and key technology, theoretical derivation of the principle of external modulator optical millimeter wave signal is generated. Based on building the simulation module realizes the double sideband (DSB), single sideband (SSB) and optical carrier suppression (OCS) of three kinds of modulation of the optical millimeter wave signal, the spectrum structure is three and analysis of different modulation of the millimeter wave signal characteristics. (2) the basic principle theory of coherent detection technology, analyzing the characteristics of M binary phase shift keying and quadrature amplitude modulation of two kinds of high order modulation. Build a 16QAM transmission system based on coherent detection technology, the simulation analysis of nonlinear effect in the transmission well, the digital coherent detection in signal processing module. (3) based on polarization multiplexing and coherent detection technology RoF-WDM-PON fusion system. In the design, through polarization control, respectively orthogonal polarization modulation The carrier, the receiver does not need to introduce independent laser under the condition of complete homodyne detection and heterodyne detection at the same time, the distribution of wired and wireless signals. In addition, the scheme is also implemented using pure carrier carrier, namely for the uplink transmission is separated from the downlink transmission. Through building simulation system. The error vector magnitude (EVM) signal constellation simulation curves and the results were analyzed to verify the feasibility of the design.

【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.1

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