摘要
CO-OFDM(相干光正交频分复用)系统具有高效的数字信号处理能力,是未来100Gbit/s高速光传输实现的备选方案。文章对PDM-CO-OFDM(基于PDM(偏分复用)技术的CO-OFDM)系统的传输机理及数学模型进行了分析,在此基础上对系统联合信号均衡算法进行了讨论,并通过数值仿真加以验证。结果表明,PDM-CO-OFDM系统采用联合信号均衡可有效抑制PDM带来的噪声影响,实现偏振信号的不敏感接收。在不需偏振控制器的条件下,通过SMF(单模光纤)传输960km后,系统Q值较CO-OFDM系统降低了0.3dB。
With highly-efficient digital signal processing capability, the Coherent Optical Orthogonal Frequency Division Multi- plexing （CO-OFDM） system is considered as a promising option for future 100 Gbit/s high-rate optical transmissions. This paper analyzes the transmission mechanism and mathematical model of the Polarization Division Multiplexing （PDM）-based CO-OFDM technology and on this basis discusses a joint signal equalization algorithm for this system. Numerical simulation results verify that using this algorithm, the said system can effectively suppress the noise effects brought about by PDM, reali- zing the insensitive reception of the polarization signals. Specifically, the system Q value is lowered by only 0.3 dB than the CO-OFDM system after 960 km single-mode fiber transmission without any polarization controller.
出处
《光通信研究》
北大核心
2015年第3期5-8,共4页
Study on Optical Communications
基金
国家"九七三"计划资助项目(2012CB315600)
江苏省自然科学基金资助项目(Bk2012508)
