中国激光, 2014, 41 (s1): s105009, 网络出版: 2014-07-03
光纤通信相干接收系统中基于峰均功率比的色度色散的动态监测与补偿研究
Chromatic Dispersion Dynamic Monitoring and Compensation Based in Peak to Average Power Ratio for Coherent Optical Communication Receiving System
光通信 色度色散 峰值平均功率比 两级搜索算法 optical communications chromatic dispersion peak to average power ratio two search algorithm
摘要
在相干接收系统中,采用峰值平均功率比(PAPR)作为反馈信号来动态监测与补偿色度色散(CD),该方法对码型、偏振模色散及偏振相关损耗不敏感。由于链路中CD积累最少的时候PAPR最小,则可以用PAPR作为相干接收算法中频域补偿CD的反馈信号。对相干接收中通过模数转换器的信号进行CD补偿,使用直接搜索和两级搜索两种算法搜索PAPR最小值,并根据此时滤波器的抽头系数监测链路中CD值。两种算法监测CD与补偿的平均误差分别为312 ps/nm和226 ps/nm, 与直接搜索算法相比,两级搜索算法耗时短,复杂度低,灵敏度更高。
Abstract
Chromatic dispersion (CD) dynamic monitoring and compensation technique by using peak to average power ratio (PAPR) to as a feedback is used in coherent communication system , and this method is insensitive for pattern, polarization mode dispersion and polarization dependent loss. Because the smallest PAPR typically corresponds to the CD that results in the best performance, PAPR is used as feedback signal. We search PAPR minimum through direct search and two step search algorithms in frequency compensation. CD compensation value is the accumulated value in the link. The average errors of two methods to monitor CD are 312 ps/nm and 226 ps/nm. Therefore two search algorithm has lower complexity, and higher sensitivity.
张玮, 席丽霞, 赵东鹤, 张肇敏, 白顺昌, 唐先锋, 张晓光. 光纤通信相干接收系统中基于峰均功率比的色度色散的动态监测与补偿研究[J]. 中国激光, 2014, 41(s1): s105009. Zhang Wei, Xi Lixia, Zhao Donghe, Zhang Zhaomin, Bai Shunchang, Tang Xianfeng, Zhang Xiaoguang. Chromatic Dispersion Dynamic Monitoring and Compensation Based in Peak to Average Power Ratio for Coherent Optical Communication Receiving System[J]. Chinese Journal of Lasers, 2014, 41(s1): s105009.