A novel chromatic dispersion 16/64-QAM system based on histogram monitoring technique for asynchronous amplitudehistogram  

作　　者：YAN Li-juan ZHU Bo LIU Guo-qing HU Fang-ren 

机构地区：[1]Department of Optical Information Technology, Nanjing University of Posts and Telecommunications, Nanjing210046, China

出　　处：《Optoelectronics Letters》2013年第3期229-232,共4页光电子快报（英文版）

基　　金：This work has been supported by the National Natural Science Foundation of China （No.61274121）, the Natural Scienee.Foundation of Jiangsu Province （No.BK2012829）, and the Scientific Research Foundation of Nanjing University of Posts and Telecommunications p/qo.NY212007）.

摘　　要：A novel chromatic dispersion （CD） monitoring technique based on asynchronous amplitude histogram （AAH） for higher order modulation formats is proposed in this paper. Without demodulating the signal, in the monitoring scheme, the received signal is sampled asynchronously, and thus clock information and high-speed sampling units are unnecessary, resulting in low cost and high reliability. Simulations of CD monitoring technique for non-return-to-zero/return-to-zero （NRZ/RZ） 16- and 64-quadrature amplitude modulation （QAM） systems with different optical signal-to- noise ratios （OSNRs） and duty cycles are investigated, and the tolerance of the scheme is also discussed. Simulation results show that the presented CD monitoring technique with high sensitivity can be applied to monitor the residual CD of a transmission link in the next-generation optical networks.

关 键 词：QAM系统 监测技术 异步采样 直方图 色散 正交幅度调制 信号噪声比 下一代光网络 

分 类 号：TN911.5[电子电信—通信与信息系统] S858.31[电子电信—信息与通信工程]