100Gbps光通信数字信号处理器预处理系统的设计与验证

发布时间：2018-07-16 20:27

【摘要】：进入4G时代以来,各种语音和视频、高速数据业务的快速发展,导致了IP流量也跟随其快速增长,从而对骨干传输网络提出了更高的要求。相应的,光纤通信也得到了飞速发展,100Gbps高速长距离光传输系统,100Gbps高速城域光传输系统以及200G高速城域光传输系统等高速通信已经面临大量商用的局面,然而其成本则居高不下,其原因是光纤高速通信的DSP技术被少数公司所垄断,因此开发出一款DSP产品有利于光传输市场的充分竞争,不但能提升网速并且能降低流量价格,使广大用户受益。在高速光纤通信的系统传输过程中,信号在传输过程中主要受到了以下干扰:光电转换,电光转换,光调制解调器等模拟器件对信号的损伤;本振光源和发送光载波的频差以及相位噪声;光纤色度色散的影响;两个偏振态之间的串扰。DSP预处理系统作为DSP芯片收端第一级,着力解决于前级光电转换,电光转换,光调制解调器等模拟器件对信号引入的直流分量,四路延时不对齐,以及IQ不平衡,并根据信号计算出功率增益以控制前级的放大器,使模拟信号功率使得ADC工作在最佳状态。为解决上述问题,设计去直流模块用于信号取反和去直流,延时调整模块用于信号取反和延时调整,动态延时跟踪模块用于动态延时的计算,IQ不平衡补偿模块用于IQ两路幅度的调平,功率增益模块用于功率增益计算和功率丢失LOS告警信号的计算。在设计完成之后,针对预处理系统提取出45个功能点,并规划71条测试用例,截止论文结束时,71条用例全部通过,并覆盖所有功能点。本文中对DSP预处理系统从算法,硬件和验证三个角度进行了详述,对作者在预处理系统中的工作做了总结,并在文章的最后对后期工作做了展望。总而言之,未来几年,光纤通信行业将迎来空前的发展,100Gbps传输网络将大量的进入市场,希望文中100Gbps数字信号处理技术能够成功进入市场,造福广大用户。
[Abstract]:Since the 4G era, the rapid development of voice, video and high-speed data services has led to the rapid growth of IP traffic, which puts forward higher requirements for backbone transmission networks. Accordingly, optical fiber communication has also been developed rapidly, such as 100Gbps high-speed metropolitan optical transmission system and 200G high-speed metropolitan optical transmission system. However, its cost is still high. The reason is that the DSP technology of fiber-optic high-speed communication is monopolized by a few companies, so developing a DSP product is conducive to the full competition of the optical transmission market, which can not only increase the speed of the network, but also reduce the price of traffic, and benefit the vast number of users. In the transmission process of high-speed optical fiber communication system, the signal is mainly affected by the following interference: photoelectric conversion, electro-optic conversion, optical modem and other analog devices damage the signal; The frequency difference and phase noise of local light source and transmitting optical carrier, the influence of chromatic dispersion of optical fiber, the crosstalk between two polarization states, the DSP pretreatment system, as the first stage of receiving end of DSP chip, are solved in the front stage photoelectric conversion, electro-optic conversion, etc. Analog devices, such as optical modems, introduce DC components, four-channel delay misalignment, and unbalanced IQ, and calculate the power gain according to the signal to control the amplifier, so that the analog signal power makes the ADC work in the best state. In order to solve the above problems, the de-DC module is designed for signal retrieval and de-DC, and the delay adjustment module is used for signal retrieval and delay adjustment. The dynamic delay tracking module is used to calculate the dynamic delay and the IQ imbalance compensation module is used to adjust the amplitude of IQ, the power gain module is used to calculate the power gain and the power loss Los alarm signal is calculated. After the design is completed, 45 function points are extracted for the preprocessing system, and 71 test cases are planned. By the end of the paper, all of the 71 use cases have passed and all the function points have been covered. In this paper, the DSP preprocessing system from the algorithm, hardware and verification three aspects are described in detail, the author's work in the pre-processing system is summarized, and in the last part of the paper, the future work is prospected. In short, in the next few years, the optical fiber communication industry will usher in an unprecedented development of 100Gbps transmission network will enter the market a large number of hope that the 100Gbps digital signal processing technology can successfully enter the market, for the benefit of the vast number of users.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN929.1;TP332

【参考文献】