摘要
为了补偿卫星平台随机振动引起的空间光-单模光纤耦合效率损失,对比分析了基于章动算法和随机并行梯度下降(SPGD)算法的参数选取对算法稳定性和收敛速度的影响,并在典型卫星振动谱条件下对2种算法的补偿效果进行了评估。仿真结果表明:章动算法补偿后的平均耦合效率为81.26%,均方根误差为7.2×10^-4;SPGD算法补偿后的平均耦合效率为80.72%,均方根误差为1.9×10^-3。相比于SPGD算法,在最优情况下章动算法的均方根误差降低了62.1%,其稳定性更好。
In order to compensate for the coupling efficiency loss of space optical-single mode fiber caused by random vibration of satellite platform,the influence of parameter selection based on nutation algorithm and random parallel gradient descent(SPGD)algorithm on the stability and convergence speed of the two algorithms is compared and analyzed.The compensation effects of the two algorithms are evaluated under typical satellite vibration spectrum conditions.The simulation results show that the average coupling efficiency of nutation algorithm is 81.26%,and the root mean square error is 7.2×10^-4;the average coupling efficiency of SPGD algorithm is 80.72%,and the root mean square error is 1.9×10^-3.Compared with SPGD algorithm,the root mean square error of nutation algorithm is reduced by 62.1%in the optimal case,and its stability is better.
作者
赵卓
谌明
刘向南
杨成武
李晓亮
ZHAO Zhuo;CHEN Ming;LIU Xiangnan;YANG Chengwu;LI Xiaoliang(Beijing Research Institute of Telemetry,Beijing 100094,China)
出处
《光通信技术》
北大核心
2020年第12期47-51,共5页
Optical Communication Technology
基金
民用航天资助项目资助
中国航天科技集团有限公司自主研发项目资助。
关键词
卫星激光通信
随机振动
光纤耦合
章动
随机并行梯度下降
satellite laser communication
random vibration
optical fiber coupling
nutation
stochastic parallel gradient descent