基于OFDM的WDM-PON前传网络  

WDM-PON Fronthaul Networks Based on OFDM

作　　者：王逸霖 张春蕾[1] WANG Yi-lin;ZHANG Chun-lei(School of Electronic and Information Engineering,Lanzhou Jiaotong University,Lanzhou730070,China)

机构地区：[1]兰州交通大学电子与信息工程学院,兰州730070

出　　处：《兰州交通大学学报》2022年第3期86-91,共6页Journal of Lanzhou Jiaotong University

摘　　要：为了满足5G前传网络传输容量大、高速率、业务多的需要,采用基于正交频分复用的波分复用无源光网络系统作为前传网络.系统下行链路传输正交频分复用信号,上行链路传输非归零信号,上下行传输速率均为10Gb/s,并用反射式半导体光放大器进行再调制.通过光通信仿真软件验证该系统,对系统在不同传输距离下的传输性能进行研究和分析.仿真结果表明:在10,20km光纤传输后,下行正交频分复用信号星座图端正,星座点分布均匀,上行非归零信号眼图张开度大,传输性能良好,验证了下行传输10Gb/s的正交频分复用信号、上行传输10Gb/s非归零信号的波分复用无源光网络系统可以作为承载方案应用于5G前传网络.In order to meet the needs of 5 G fronthaul network with large transmission capacity,high speed and many services,a wavelength division multiplexing passive optical network(WDM-PON)system based on orthogonal frequency division multiplexing(OFDM)is used as the fronthaul network.The system downlink transmits OFDM signals,while the uplink transmits non-return-to-zero(NRZ)signals,both the uplink and downlink transmission rates are 10 Gb/s,and the reflective semiconductor optical amplifier(RSOA)is used for remodulation.The system is verified by optical communication simulation software,and the transmission performance of the system under different transmission distances is studied and analyzed.The simulation results show that after 10 km and 20 km optical fiber transmission,the constellation diagram of the downlink OFDM signal is correct,the constellation points are evenly distributed,the eye diagram of the uplink NRZ signal has a large opening,and the transmission performance is good.It is verified that the WDM-PON system that transmits 10 Gb/s OFDM signals downstream and 10 Gb/s NRZ signals upstream can be applied to 5 G fronthaul networks as a bearer scheme.

关 键 词：正交频分复用 波分复用无源光网络 反射式半导体光放大器 前传网络 5G 

分 类 号：TN914[电子电信—通信与信息系统]