【作者】 杨康；

【导师】 刘剑飞；

【作者基本信息】 河北工业大学 ， 通信与信息系统， 2010， 硕士

【摘要】 随着光通信网络速率的不断提升,信号在传输过程中产生的色散现象也越来越严重,因此为了保证信号传输的准确性,对传输信号进行色散补偿成为信号传输过程中必不可少的环节。由于自适应电子补偿器具有实时补偿、便于扩展、成本低等优点,使得这种补偿方法受到了人们越来越广泛的关注。本文首先介绍了国内外色散补偿技术的研究现状;接下来对各种自适应补偿系统的模型进行比较分析,通过比较可以看出,在使用相同自适应算法的前提下,判决反馈补偿器的补偿效果比较好;随后对判决反馈均衡器中前馈和反馈滤波器的结构进行了讨论,包括横向滤波(TF)结构和横向行波滤波(TWF)结构及TWF的改进结构,为了得到较大的可用带宽,通过仿真比较我们最终选择了TWF结构作为判决反馈补偿器中前馈和反馈补偿的实现结构。接着,对自适应补偿器的电路和版图的实现方式进行了详细研究,并从以下两个方面进行了仿真:一是时域仿真,通过MATLAB仿真,在理论上验证了均衡器在高速传输系统中能够完成对色散的补偿;二是S参数仿真,通过这个仿真来验证功率增益和输入输出的匹配情况。通过仿真结果,我们可以看到在高速的传输信道中,判决反馈补偿器能够对色散进行有效的补偿。更多还原

【Abstract】 As the speed of optical communication continue to increase, the dispersion phenomenon which is generated in the process of signal transmission. Therefore, in order to ensure the accuracy of signal transmission, it is necessary to compensate the dispersion of the transmission signal. As the adaptive electronic dispersion compensator has the advantage of real-time compensation, easy extension and low cost, the compensation has been grown widespread concern.In this paper, we first described the research status of compensation technique at home and abroad. Next, we compared and analyzed a variety of self-adaptive compensation system models, after compared we obtained the balanced effect of decision-feedback model was better. Then the structures of DFE in the feed forward and feedback filter were discussed, including transverse filter (TF) , transverse wave filter structure (TWF) and its two kinds of improvement structures. In order to get a larger bandwidth, we finally chose the latter one as a DFE in the feed forward and feedback equalizer implementation structures through the comparison and simulation. After that, we carried out a detail study of the implementation approach of the circuit and layout structures of DFE. And two parts simulation were carried out. The first part was time-domain simulation by using MATLAB; we theoretically verified the equalizer could complete its dispersion compensation in 40 GB/s system; the second part was S parameters simulation, we verified the power gain and the match of the input and output through this simulation. We can see that in high-speed transmission channel, the DFE can effectively compensate PMD.更多还原