高速光通信中多进制调制格式传输性能研究

发布时间：2018-01-05 08:11

本文关键词：高速光通信中多进制调制格式传输性能研究　出处：《聊城大学》2014年硕士论文　论文类型：学位论文

【摘要】：如今，随着互联网业务的飞速增长和各种新业务的不断出现，使得光通信网络的传输速率持续增加。对于单信道40Gbps及其以上的高速光传输系统，其核心路由的接口速率将超过100Gbps，原本不需要考虑的非线性效应和偏振模色散（PMD）影响变得严重，光信号质量恶化，数据误码率急剧上升，降低了系统的传输性能。作为高速光传输系统研究的关键技术之一的新型码型调制格式，不仅可以有效地降低传输系统的传输损伤和提高系统的抗色散能力和抗非线性效应能力，而且可以适当的改善高速光通信系统的频谱效率和传输性能。由于不同的传输系统有不一样的参数，如速率、长度、频谱宽度、光纤型号、放大器等，所以不同的传输系统有其最为适用的调制格式。而采用新型的多进制调制格式是解决上述问题的重要手段之一。本论文主要针对基于相位调制的多进制调制格式在高速光传输系统中的传输性能（包括色散容限和非线性容限等）进行了系统模型仿真、对比，，同时还将先进的编码调制技术与偏振复用以及FDPC技术相结合，搭建了高速长距离光传输系统，仿真分析其系统的传输性能。所做的主要工作有： 1、研究并熟练掌握基于相位调制原理的三种多进制调制格式CSRZ-DQPSK/CSRZ-8DPSK/CSRZ-16DPSK的调制和解调原理。 2、利用Matlab和OptiSystem光通信仿真软件搭建高速单信道光传输系统模型，对三种多进制相位调制格式在系统中的抗色散能力以及抗非线性能进行了仿真分析，指出其在色散容限和非线性容限上的优势和不足。同时还研究了不同的色散补偿方式对三种多进制调制格式的影响。 3、在以上工作的基础上，通过理论分析和软件仿真，搭建起了100Gbps高速光POLMUX-CSRZ-DQPSK-WDM传输系统，并从系统Q值随3dB带宽滤波的变化曲线、系统的消光比随光脉冲时延的变化曲线、系统的差分群时延（DGD）容忍度以及系统的非线性容忍度这四个方面分别对系统的传输性能进行了研究分析。
[Abstract]:Nowadays, with the rapid growth of Internet services and the emergence of various new services, the transmission rate of optical communication networks continues to increase. For single-channel high-speed optical transmission systems with 40Gbps or more. The interface rate of the core route will exceed 100 Gbps. the nonlinear effect and polarization mode dispersion (PMDs) effect which should not be considered has become serious, the optical signal quality has deteriorated, and the data bit error rate has risen sharply. It reduces the transmission performance of the system. As one of the key technologies in the research of high-speed optical transmission system, it is a new type modulation format. It can not only effectively reduce the transmission damage of transmission system, but also improve the ability of anti-dispersion and anti-nonlinear effect of the system. Because different transmission systems have different parameters, such as speed, length, spectrum width, fiber type, amplifier and so on. Therefore, different transmission systems have their most suitable modulation format, and the adoption of a new multi-ary modulation format is one of the most important means to solve the above problems. In this paper, the transmission performance (including dispersion tolerance and nonlinear tolerance) of the multi-ary modulation scheme based on phase modulation in high-speed optical transmission system is simulated and compared. At the same time, the advanced coding modulation technology, polarization multiplexing and FDPC technology are combined to build a high-speed long distance optical transmission system. The transmission performance of the system is simulated and analyzed. The main work is as follows: 1. Study and master the modulation and demodulation principle of CSRZ-DQPSK/CSRZ-8DPSK/CSRZ-16DPSK based on phase modulation principle. 2. The high-speed single-channel optical transmission system model is built by using Matlab and OptiSystem optical communication simulation software. The anti-dispersion and anti-nonlinear performances of three kinds of multi-ary phase modulation schemes in the system are simulated and analyzed. Its advantages and disadvantages in dispersion tolerance and nonlinear tolerance are pointed out. At the same time, the influence of different dispersion compensation methods on the three multiary modulation schemes is also studied. 3. Based on the above work, a 100Gbps high speed optical POLMUX-CSRZ-DQPSK-WDM transmission system is built through theoretical analysis and software simulation. The Q value of the system varies with the 3dB bandwidth filter and the extinction ratio of the system with the time delay of the optical pulse. The differential group delay (DGD) tolerance of the system and the nonlinear tolerance of the system are studied and analyzed respectively.
【学位授予单位】：聊城大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.1

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