少模光纤通信系统中的自适应频域均衡算法

发布时间：2018-04-26 04:24

本文选题：光通信 + 变步长-频域块最小均方算法　；参考：《激光技术》2017年01期

【摘要】：少模光纤模式复用存在模式耦合和差分模式时延,必须通过自适应均衡算法补偿。为了降低长距离少模光纤通信系统中自适应均衡算法的复杂度,采用基于变步长-频域块最小均方算法的多输入多输出均衡器对2×2模分复用系统解复用。利用频域块最小均方自适应算法修正均衡器权系数,并通过变步长函数调整步长因子,兼顾算法收敛速度和收敛性能。算法可通过快速傅里叶变换降低计算复杂度。在112Gbit/s的1000km少模光纤高速通信仿真系统中,保证相同收敛速度情况下,提高信号Q2因子3.7d B,并在可编程现场门阵列上验证了100km少模光纤通信系统时的算法性能。结果表明,该算法能够实现模分复用系统的信号解复用,达到快速收敛、低稳态失调的目的。
[Abstract]:Mode coupling and differential mode delay exist in mode multiplexing of optical fiber, which must be compensated by adaptive equalization algorithm. In order to reduce the complexity of adaptive equalization algorithm in long-distance and low-mode optical fiber communication systems, a multi-input and multi-output equalizer based on variable step size and frequency domain block least mean square algorithm is used to demultiplex the 2 脳 2 module division multiplexing system. The equalizer weight coefficient is modified by using the frequency domain minimum mean square adaptive algorithm, and the step size factor is adjusted by variable step size function, which takes into account the convergence speed and convergence performance of the algorithm. The algorithm can reduce the computational complexity by fast Fourier transform. In the 1000km low mode optical fiber high speed communication simulation system of 112Gbit/s, the signal Q2 factor is improved by 3.7 dB under the same convergence speed. The algorithm performance of the 100km low mode optical fiber communication system is verified on the programmable field gate array. The results show that the algorithm can realize signal demultiplexing in modular division multiplexing system and achieve fast convergence and low steady-state misalignment.
【作者单位】：天津大学精密仪器与光电子工程学院光电信息技术教育部重点实验室;
【分类号】：TN929.11

【相似文献】