【作者】 王浩；

【导师】 李平；

【作者基本信息】 山东大学 ， 电子与通信工程（专业学位）， 2018， 硕士

【摘要】 高速数字光纤通信是现如今应用最为广泛的信息通信方式,在社会生产、人类生活、国防事业等各个领域发挥着不可替代的作用,也正是由于高速数字光纤通信系统在信息通信领域扮演的重要角色,对其安全性和可靠性提出了更高、更加严格的要求。在影响高速数字光纤通信可靠性的因素中,误码是一项最重要的指标,是衡量高速数字光纤通信的数据传输质量的标准之一。在高速数字光纤通信系统中,误码的出现会对网络数据的传输造成严重影响,误码现象一旦发生,会随着网络传输交换节点设备的增多而不断恶化,再加上外界环境的干扰,还会使得误码情况进一步扩大,严重时将会导致传输业务彻底中断或崩溃,严重降低了高速数字光纤通信系统的可靠性。本文通过对WDM高速数字光纤通信系统进行研究分析,提出了一种基于误码分析的高速数字光纤通信系统性能预测方法。针对串联网络和并联网络的各自结构特点建立相应的可靠性方程,应用可靠性理论方法建立网络对误码数据进行统计学研究,分析了影响光纤通信可靠性的各种因素并制定了光纤的保护和恢复方案。本文简要介绍了 WDM光纤通信误码数据的采集方法,并制定了光传输系统误码数据的处理流程,为了研究WDM光纤通信系统的误码率,以质量因子(Q因子)为对象,采用MATLAB对光信号进行了仿真分析。结果表明,在其他变量确定的条件下,Q值将随着激光器的频率先增大然后减小,当频率为191Thz时,取得最大Q值为11.1042;当功率为OdB时,取得最大Q值为10.7786;当衰减系数为0.21时,取得最大Q值为10.7797,且达到最大值后,Q值随着激光器的功率增大而减小。设计了基于时间序列法和回归分析法的误码数据分析方法,然后采用最小二乘法进行多项式曲线拟合,建立了 WDM高速数字光纤通信系统性能预测模型。最后分别采用MATLAB对两种方法的预测模型进行了仿真验证,从对比的仿真结果可以看出,虽然基于指数平滑法预测的结果有一定的参考价值,但基于回归分析法的高速数字光纤通信性能预测模型能够很细腻的反馈原始数据的变化趋势,拟合的曲线与原始数据的贴合度较高,因此对误码数据的预测精度明显高于基于指数平滑法的预测模型,获得了较为理想的预测效果。通过本文的研究,梳理了 WDM高速数字光纤通信系统可靠性的影响因素,建立了性能预测模型,并结合研究结果提出了提高WDM高速数字光纤通信系统可靠性的有效措施,对改善WDM高速数字光纤通信系统的安全性和生存性具有重要意义。本文创新性的建立了一种基于高速数字光纤通信系统误码数据分析的可靠性研究方法,以误码数据为依据,进行高速数字光纤通信系统的可靠性预测,对提高高速数字光纤通信系统的安全性和可靠性具有重要研究价值。更多还原

【Abstract】 High-speed digital optical fiber communication is the most widely used mode of information communication nowadays.It plays an irreplaceable role in social production,human life,national defense and other fields.It is also because of the important role of high-speed digital optical fiber communication system in the field of information and communication,the security and reliability of the system put forward higher and stricter requirements.Among the factors that affect the reliability of high-speed digital optical fiber communication,error code is the most important index and one of the standards to measure the data transmission quality of high-speed digital optical fiber communication.In high-speed digital optical fiber communication system,the emergence of error code will seriously affect the transmission of network data.Once the error phenomenon occurs,it will worsen with the increase of network transmission switching node equipment,and the external environment will interfere with it.It will further expand the error rate situation,which will lead to the complete interruption or collapse of transmission services,which seriously reduces the reliability of high-speed digital optical fiber communication system.In this paper,through the research and analysis of WDM high-speed digital optical fiber communication system,a performance prediction method of high-speed digital optical fiber communication system based on error analysis is proposed.Aiming at the respective structural characteristics of the series network and the parallel network,the corresponding reliability equations are established.The reliability theory method is used to establish a network to study the error data statistically.Various factors affecting the reliability of optical fiber communication are analyzed and the protection of the optical fiber is established.And recovery plan.The method of collecting the error data of WDM optical fiber communication is briefly introduced,and the processing flow of the error code data of the optical transmission system is formulated.In order to study the BER of WDM optical fiber communication system,the quality factor(Q factor)is used as the object,and the optical signal is simulated using MATLAB.The results show that,under the conditions determined by other variables,the Q value follows the frequency of the laser.Increase and decrease.When the frequency is 191Thz,the maximum Q value is 11.1042.When the power is OdB,the maximum Q value is 10.7786.When the attenuation coefficient is 0.21,the maximum Q value is 10.7797,and the maximum value is reached.After that,the Q value decreases as the power of the laser increases.The error data analysis method based on time series method and regression analysis method is designed.Then the least squares method is used to perform polynomial curve fitting.The performance prediction model of WDM high-speed digital optical fiber communication system is established.Finally,Matlab was used to verify the prediction models of the two methods.From the comparison of the simulation results,we can see that although the results based on the exponential smoothing method have certain reference value,the performance of high-speed digital fiber communication based on the regression analysis method The predictive model can be very delicate feedback on the change trend of the original data,and the fitted curve has a high degree of fit with the original data.Therefore,the prediction accuracy of the error data is significantly higher than that based on the exponential smoothing method,and better results are obtained.The prediction effect.Through the research of this paper,the influencing factors of the reliability of WDM high-speed digital optical fiber communication system are combed,a performance prediction model is established,and the effective measures for improving the reliability of WDM high-speed digital optical fiber communication system are proposed in combination with the research results,and the WDM high-speed digital optical fiber is improved.The security and survivability of communication systems are of great significance.This article innovatively establishes a high-speed digital optical communication system reliability research method based on error data analysis of high-speed digital optical communication systems.Based on the error data,the reliability prediction of high-speed digital optical communication systems is performed to improve the high speed.The safety and reliability of digital optical fiber communication system have important research value.更多还原