摘要
在超长距离传输时,信号调制格式是可提高系统传输性能的一项关键技术。先进的信号调制格式将提高系统的色散、非线性容限,延长系统传输距离。文章简要介绍了基于强度调制的NRZ、RZ和CSRZ三种编码的产生原理,并通过仿真分析了它们在不同速率下的抗色散和非线性的能力,最后采用CSRZ码对系统进行优化设计。
Modulation format of signal has become a key technique to enhance the transmission capability of system in the long-distance system. Advanced formats will enhance the limitation of dispersion and nonlinearity, and prolong the transmission distance. This paper introduced the bring principle of NRZ, RZ and CSRZ, which were based on amplitude modulation. Then it analysed their ability to stand against the dispersion and nonlinearity under different velocity on the plat of OptSim. At the last, it optimized the system with CSRZ.
出处
《光通信技术》
CSCD
北大核心
2010年第7期20-22,共3页
Optical Communication Technology
