一种新的自适应增益盲优化算法提高自由空间光通信性能

Improving performance of free space optical communication using an adaptive gain blind optimization algorithm

摘要:

由于大气湍流的影响,光束在大气中传输时产生 严重畸变,造成自由空间光(FSO)通信链路 性能恶化。为了提高系 统性能,构建了基于盲优化自适应光学的FSO通信系统,提出了一种新的自适应 增益随机并行梯度下降(SPGD)优化 算法。数值模拟结果表明,本文算法对大气湍流引起的波前误差进行实时补偿,能 够达到 很好的校正效果,比固定增益优化算法具有更好的收敛速度和精度。

Abstract:

Free space optical communication systems can be severely affected by a tmospheric turbulence which causes optical wavefront distortion and degrades comunication l ink performance.In order to achieve real-time compensation of wavefront error cause d by atmospheric turbulence and improve single model coupling efficiency,the free sp ace optical communication system based on adaptive optics technology is adopted,and an adap tive gain stochastic paraell gradient descent (SPGD) optimization algorithm is proposed.Th e results show that the blind optimization adaptive optics technology has good correction effec t and the adaptive gain optimization algorithm is better than the fixed gain optimization algorithm.